magnacharger

[h2fan]

anyone have any info on the radix supercharger

[h2fan]

anyone have any info on the radix supercharger

[whipplecharged]

The radix supercharger by Magnacharger is a good kit and is intercooled.I have had customers run it on the dyno and have made good hp and they also run the Whipple on the dyno and made 36 more hp than the Magnacharger.

Overall the Mgnacharger is a good kit and everyone That I have talked to with one is happy with it.

But if your after an intercooler supercharger it is a good way to go. Whipple is also making an intercooler upgrade that you will be able to add to existing kit. It's supposed to be ready sometime this summer.

[h2fan]

would that extra hp from the whipple come from some one who knew how to programe that unit better then the magnacharger i wanted the whipple but my tuner said he would rather go with the eaton/magnacharger with the intercooler so kinda of shopping for price seen them for around 5k

[whipplecharged]

The vehicles were 2 different H2's both with the Xtremeflow exhaust and cold air intake. The only tuning difference was thay the Whipple Supercharged one had the Power Flash to take out the torque management. What is the best price you have found on either unit I might be able to get you a good deal on either unit. Whipple will have the intercooler later that you can add on.

[h2fan]

4900.00 for the mag

[h2fan]

4850 for the mag

[whipplecharged]

I found it for $4700.00 plus shipping

[whipplecharged]

h2fan,

Any better luck?

I found it for $4675.00 plus shipping

[h2fan]

got a price installed for 6800.00 with there own programing. for the polished unit with new valve springs and 3/36 warrenty i know the installers will do it right. they have one of the best programers in the country. i have a z06 that they worked on http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by h2fan:
"got a price installed for 6800.00 with there own programing. for the polished unit with new valve springs and 3/36 warrenty i know the installers will do it right. they have one of the best programers in the country."<HR></BLOCKQUOTE>
Why new valve springs? Heard about pinning the crank, and transmission upgrades...

What about the $200 extended drive-train warranty from Magnuson. What does it involve and is it worth it?

Ed

[whipplecharged]

h2fan,

Thats great. I'm not sure why valve springs. Sure its not rockers? Also, make sure on the programming. The Magnacharger comes with a flash programmer for their supercharger.

TW,

The warranty is worth the $200.00 if there i a prolem you won't have to eat it.

[h2fan]

should have the magnacharger on by july4 thinking of exhaust system -- they are pushing the valve spring because of boost. should be cool with some extra hp http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by h2fan:
"should have the magnacharger on by july4 thinking of exhaust system -- they are pushing the valve spring because of boost. should be cool with some extra hp" http://www.elcova.com/infopop/emoticons/icon_biggrin.gif<HR></BLOCKQUOTE>
Good luck with the Magnacharger, will be interested to see how well you like it!

Pushing the new valve springs "because" of boost? Of course it is because of BOOST. That is what a supercharger does is boost the air/fuel mix... But, WHY does supercharging the engine require new (stronger?) valve springs --- is my question.

I would imagine that completely rebuilding the engine wouldn't hurt either? Stronger valves, rods, pistons, cranks, etc... Rebuilt, beefier transmission too? But tearing apart a brand new engine to beef it up seems just a little bit on the extreme side of sensible to my conservative values. http://www.elcova.com/infopop/emoticons/icon_smile.gif As it is, $7,000 for the extra HP seems a wee bit expensive?

Cruising in my H2 at 75mph on the interstate, my tach reads about 2,250rpm when not pulling any trailers. Would a supercharger really be doing anything or just loafing along? I know, if I punch it and accelerate the supercharger will really make a big difference. But I rarely ever need to do that...

But, pulling a travel trailer? That would be quite helpful then? But, say I use my H2 10 days a trip, twice a year, for three years. Total of 60 days of towing. The supercharger cost would work out to average more than a hundred bucks a day for each days use when towing... Over a thousand bucks per travel trailer trip?

I can pull a travel trailer without a supercharger... but not as easily. Do people think it is worth that much money to be able to jerk that travel trailer along faster? I didn't include the cost of premium fuel over regular fuel either. About 13% more in fuel costs?

The more I think about it, the more I think I will just drive in the right-hand (slow poke) lane and take a couple hours longer each day to get to wherever I am going. Maybe spend the 7 grand for a nicer travel trailer instead of a supercharger?

Decisions, decisions! http://www.elcova.com/infopop/emoticons/icon_confused.gif

Ed

[KenP]

The only things in the 6.0 that are strong enough over time with a SC are the crank and rods. Better replace or rebuild everything else w/ heavy duty parts. Especially the trans.

I do not trailer for long distances, but I believe there have been posts about the poor towing ability of the H2. This is primarily due to wheelbase and height. Check it out...

Black Lingenfelter Lux

[whipplecharged]

Remember, that with a supercharger you can get more HP and TORQUE out of the motor but also increase your fuel milage when towing. You will be using less throttle to do the same job as a n/a motor. You can get superchargers for less than $6800 no matter how conservative you are. There is always a good deal to be had.

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by KenP:
"I do not trailer for long distances, but I believe there have been posts about the poor towing ability of the H2. This is primarily due to wheelbase and height. Check it out."<HR></BLOCKQUOTE>
Ken,

That would be like closing the door after the horse got out... A little too late for reports about poor towing ability. Before I bought the H2, word was that it would be good for towing.

Tearing apart brand new engines and transmissions to rebuild them isn't my idea of being sensible. Might as well install a supercharger and tear everything up before rebuilding it all? Plus, maybe if you don't use it for a drag racing machine, it might last for a while with stock engines and transmissions after being supercharged?

Or, maybe the "smart" thing to do is to do nothing...

Ed

"If you must choose between two evils, pick the one you've never tried before."

[Grim_Smoker]

But Ed, maybe we don't want to leave it stock. Maybe the smart thing to us would be having my H2 pump out more power then my Z06, hows 1000HP sound? Heh, just kidding but just remember, to each his own.

-Grim

2003 Sunset Metalic Orange H2 - Breathless Stage 2B, HID's, Gobi Rack & Ladder.

2003 Millenium Yellow Z06

[h2fan]

h2 goes in the shop next week let you guys know how it runs soon. will post dyno # before and after i don't think it would make more hp then my Z06 http://www.elcova.com/infopop/emoticons/icon_razz.gif

[h2fan]

h2 goes in the shop next week will post dyno# don't think it would be more then my Z06 http://www.elcova.com/infopop/emoticons/icon_wink.gif

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Grim_Smoker:
"But Ed, maybe we don't want to leave it stock. Maybe the smart thing to us would be having my H2 pump out more power then my Z06, hows 1000HP sound? Heh, just kidding but just remember, to each his own."<HR></BLOCKQUOTE>
Grim,

Soon as I read your reply I realized how badly my comments could/would be misunderstood. I sure didn't mean it isn't SMART to do mods, any mods, to your H2 or other vehicles... I just meant, smart for me to do it. REALLY!

I have owned bikes and cars that were high performance, in the past. Loved them too! But I've gradually gotten over the "need for speed", but I haven't forgotten how much I enjoyed it. For me to even suggest it isn't smart for you or others to do whatever they want to increase the H2's power would be very hypocritical of me.

I have been thinking about adding a Magnacharger to my H2 to improve its towing capabilities though, and the $7,000 it would cost to have one installed was enough to cause me to think twice. Then, when I started hearing about it voiding the H2's warranty and also needing to rebuild the BRAND NEW engine and transmission on my H2 --- that remark about it maybe not being too smart --- slipped out. http://www.elcova.com/infopop/emoticons/icon_smile.gif

I've replaced old engines with rebuilt, higher powered engines and replaced worn out transmissions too. But somehow, spending almost 60 grand to then tear apart perfectly good (and new) engines and transmissions just won't float.

If others do this I wouldn't think it has anything to do with how smart THEY are. I'd probably be the first to admire the changes and say WOW when I saw how much difference it made to the H2's power! But, to be honest, I think I would be more inclined to buy an old muscle car and rebuild it before spending the money on boosting the H2. Maybe someone already has both? And, in any case, just like you said: TO EACH HIS OWN. http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

Ed

Too bad there isn't a middle of the road mod that would add enough low-rpm power to help towing, but not require rebuilding the entire drive train on the H2.

[Patriot]

I don't think that by just adding a supercharger you need to "rebuild the whole engine". There are plenty of SC's on stock engines that last a LONG time stock.

Just drive sensible and don't try to "spin all four tires"...

I'm having a whipple installed and everyone told me there was no need to rebuild or change anything.

[Grim_Smoker]

I figured you didn't really mean it like that Ed, Just pickin on ya http://www.elcova.com/infopop/emoticons/icon_wink.gif http://www.elcova.com/infopop/emoticons/icon_biggrin.gif I love muscle cars, and would love to own one, but I like new cars as well, so the Z gives me the best of both worlds!! http://www.elcova.com/infopop/emoticons/icon_cool.gif But I would still love to own a red Judge, Orange Charger R/T, or a 70 black Chevelle with two white stripes, 454, and my own personal 1 million gallon gas supply http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

-Grim

2003 Sunset Metalic Orange H2 - Breathless Stage 2B, HID's, Gobi Rack & Ladder.

2003 Millenium Yellow Z06

[TheGoodHummerMan]

Okay, so will the REAL supercharger expert please stand up?

KenP said in a message dated 6-18 in this thread:
:The only things in the 6.0 that are strong enough over time with a SC are the crank and rods. Better replace or rebuild everything else w/ heavy duty parts. Especially the trans."

Patriot said in a message dated 6-21 in this thread:
"I don't think that by just adding a supercharger you need to "rebuild the whole engine". There are plenty of SC's on stock engines that last a LONG time stock."

What does "over time" mean?

What does "a LONG time" mean?

While it doesn't seem like you can BOTH be right, I would guess that IS exactly the case? If you install a supercharger on a stock engine/drive train and proceed to really USE it hard, the stock engine will probably not be able to handle it for too long? But, if you don't stick your foot in it and WOT everytime the light turns green, maybe a stock drive train and engine will be able to handle it without self-destructing?

My question, a while back was: when I'm not pulling a trailer, my H2 engine usually CRUISES along quite happily on the interstate at about 2,200 to 2300 rpm. Except for very rare instances, I do not accelerate extremely. Under these circumstances, a supercharged engine really would not be too stressful or for that matter even really be of much help?

But, say I hook a 5,000 pound trailer on the H2 and take it out on the interstate. The engine will definitely be working harder to pull the added weight but with the supercharger's help --- it won't need to run at EXTREMELY higher rpm's in order to go the same speed as when I don't pull the trailer??? Or does it?

You see, my comment about me being "smart" wasn't an exaggeration! Or should I say my NOT being smart? http://www.elcova.com/infopop/emoticons/icon_smile.gif

Ed

What does "below the curve" mean, anyways?

[Patriot]

Ed,

I did a lot of on-line research. Superchargers online has a good tech forum.

I also know several people who have installed superchargers to stock engines. They wanted more power out of their stock engine and some better performance. Not always "getting on it" but nice to have when you need the power. More peppy all around.

Also, if every engine needed to be rebuilt, do you think mfg's like Whipple would still be in business? If motor's were crapping out after every SC install, wouldn't you see a back lash?

Check out some SC Mfg sites...they will give you the facts. I doubt they would totally mislead for fear of law suits.

I know H2Bill here has several SC's on stock vehicles...some with many miles. Maybe he could add to this?

[TheGoodHummerMan]

Patriot,

Thanks... I've researched superchargers a little and read about theory and how they work, different "types" etc. It sounds like the roots type (Eaton) is a good choice because it is effective at lower rpm ranges than some other types. I now understand what an intercooler (or aftercooler) does... but one thing I'm not sure about is what "more power under the curve" actually means.

Anyone have any ideas? http://www.elcova.com/infopop/emoticons/icon_smile.gif

Also, if a supercharger requires using premium fuel instead of regular that's about a 13% increase just in fuel costs (or roughly about $200 more per year).

Rambling on like a mad man...

Ed

[Patriot]

Ed,

Yes, you have to weigh all the pro's and con's and decide if it's worth it for your situation.

Here in Pa, we have a lot of hills. All my driving is backroad and under 45mph. The H2 just struggles. Low power and TM keep it always looking for the right gear. I'm getting the SC to make it a bit easier on both me and the H2!

I'm not sure about your quote but if I had to take a stab at it...more power under the curve means just that..you are raising the HP and torque curve from the get go. Looking at a graph of HP and torque...you are putting "more" under the curve???

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Patriot:
"Here in Pa, we have a lot of hills. All my driving is backroad and under 45mph. The H2 just struggles. Low power and TM keep it always looking for the right gear. I'm getting the SC to make it a bit easier on both me and the H2!"
<HR></BLOCKQUOTE>

You're the perfect person to ask! Since superchargers "kick in" and are most effective between certain rpms, for example between 2700 and 5500 rpms --- how will a supercharger help you if you drive a lot at 45mph? No, I didn't mean to ask a stupid question, it just popped right out! http://www.elcova.com/infopop/emoticons/icon_smile.gif

Lets say you are driving on a relative level section of that Pennsylvania backroad and the engine is not reving very high at all. At that point, the supercharger is doing pretty much nothing, right? But then, lets say you come to an uphill portion of the road. As you begin to climb the hill, the engine downshifts, revs jump and the supercharger starts "working". Instead of laboring up the hill, the H2 engine is comparatively loafing (as compared to me following you in my non-supercharged H2). Then as you crest the hill, the rpms fall back, the supercharger stops boosting and you glide downhill, almost coasting...

The WHOLE point of supercharging in THIS case, is that because the engine is getting a "boost" of air/fuel and is developing more horsepower and torque --- the engine doesn't have to strain to make it up the hill?

Is this why you "sometimes" get increased fuel mileage? Because it is developing more horsepower, it can pull a heavy trailer but not need to drop into a lower gear to do it --- thus using less fuel than given the same situation without a supercharger?

If these questions border on the far side of stupid, please excuse me. I never told anyone I was a member of Mensa... http://www.elcova.com/infopop/emoticons/icon_smile.gif

Thanks!

Ed

[MAC]

Do they offer supercharged Hummer for test drive? $5K is a lot of money. If we can test drive a supercharged Hummer, I think we can pretty sure to tell if it is a fraud or for real or just maybe. I climb steep hill everyday and my Hummer is full of power, if I can test drive a supercharged Hummer, it won't go any faster (twisty roads) but maybe I can feel the surge of power that pin me to the seat, that would be good enough. I wonder if any Hummer dealer has one for testing?

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by MAC:
"Do they offer supercharged Hummer for test drive? $5K is a lot of money. If we can test drive a supercharged Hummer, I think we can pretty sure to tell if it is a fraud or for real or just maybe. I climb steep hill everyday and my Hummer is full of power, if I can test drive a supercharged Hummer, it won't go any faster (twisty roads) but maybe I can feel the surge of power that pin me to the seat, that would be good enough. I wonder if any Hummer dealer has one for testing?"<HR></BLOCKQUOTE>

Good question. http://www.elcova.com/infopop/emoticons/icon_smile.gif

I'll admit that I don't know much about superchargers (and that is an overstatement) but I think I can pretty much guess that you don't really "need" a supercharger, Mac. If while climbing your "really steep hill" everyday, your H2 is "full of power" --- you would probably not "appreciate" the extra horsepower and torque available to you from a supercharger.

But, I'll bet that if you check around, you should be able to find someone with a supercharged H2 for you to ride in? http://www.elcova.com/infopop/emoticons/icon_smile.gif

Ed

[H2 Bill]

As Patriot mentioned, I have had and still own a '94 454 Suburban with the Whipple supercharger that is totally stock except for Doug Thorley headers. I installed it when it had 50k miles on it and it now has over 102k miles on it and it runs better than new! No, I don't go out racing every weekend, but it is really nice to have the power when you need it for towing, passing, etc. I was one of the first to install the Whipple on my H2 (before Whipple had the solution for the torque management problem) so I had the pcm custom tuned by Ed Wright. He eliminated the T/M, raised shift points, firmness,etc. and it runs now like it should have from the factory. From my experience with s/c's, for a number of years, they will not effect the dependability of your stock engine if you are not constantly "putting your foot in it"! The only downside if you can call it that is that you have to run premium fuel with the s/c.

2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Edelbrock ceramics, catback,18" Ambush w/mudders,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo's, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev 454 Suburban, Blown, Doug Thorley
1970 Trans Am, balanced, blue printed, Hooker ceramics

www.4swimwear.com (http://www.4swimwear.com)

[TheGoodHummerMan]

H2 Bill,

What is Torque Management, anyways? Is it too complex an issue for a dummy to understand? Maybe you could explain it for me and assume I am completely ignorant? http://www.elcova.com/infopop/emoticons/icon_smile.gif

It sounds to me as though T/M is nothing but a big pain in the BACKSIDE? Why does GM use it?

Or, is T/M really useful for "some" reasons???

I appreciate your comments very much. They are helpful to me in deciding whether or not I really want and/or need to get my H2 supercharged --- and if I will fully enjoy it after spending a considerable amount to have it installed...

But, I must say, the more I hear people talk in general, the more I hear comments about how the 6.0L engine is underpowered for such a heavy vehicle. It does seem to make a lot of sense to add a supercharger which will increase the H2's power??? Especially if someone plans on towing something which will add even MORE load on the engine...

If torque management is NOT for dummies, just say so, I'll understand that I wouldn't understand... http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

Ed

[H2 Bill]

Actually torque management is fairly simple. It is part of the computer program that "reads" how much torque your engine is producing and once it gets to the programs' max torque setting it backs off or retards your ignition thereby reducing the strain on your drive train. GM has been using this method of reducing drive train and transmission problems for several years now on their vehicles. Most other vehicles it happens right at the shift point but on the H2 it also occurs right when you need the torque the most. When you install the supercharger and don't eliminate the T/M it actually "magnifies" the problem.
This is certainly a simplified explanation but I hope that it helps you get the idea!
Bill

2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Edelbrock ceramics, catback,18" Ambush w/mudders,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo's, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev 454 Suburban, Blown, Doug Thorley
1970 Trans Am, balanced, blue printed, Hooker ceramics

www.4swimwear.com (http://www.4swimwear.com)

[TheGoodHummerMan]

Bill,

Perfect! That was what I needed, a simplified explanation!!!

It sounds to me like the H2 can really benefit from re-programming the computer AND having the added horsepower and torque to "play" with?

I don't care at all about making my H2 quicker in the quarter-mile, but having the added power for towing or even for normal driving in hilly/mountainous areas sounds more and more tempting.

Thanks a lot for the info!

Ed

[H2 Bill]

Ed,
That's exactly why I did it. It makes it so much more fun and enjoyable to drive!
Bill

2003 H2 Hummer, Yellow,Polished Whipple Supercharged, Edelbrock ceramics, catback,18" Ambush w/mudders,lots of goodies!
Y2K Corvette Millennium Yellow Convert/Blk/Blk, B&B headers, B&B Tri-Flo's, H-Tech MAG,GMS MAF, RM Racing TwinFlow.
1994 Chev 454 Suburban, Blown, Doug Thorley
1970 Trans Am, balanced, blue printed, Hooker ceramics

www.4swimwear.com (http://www.4swimwear.com)

[TheGoodHummerMan]

Bill,

Thanks... I started out looking into this and thought it sounded ridiculous. Then I started thinking it would be a good idea... THEN, after listening to several people here, I once again flip-flopped and decided NOT to supercharge my H2.

Now, hopefully once and for all, I have decided it really is a smart move and will increase my enjoyment of this fantastic vehicle! Your comments were indeed helpful.

Thanks again, Ed

[KenP]

Ed: After being away for a few days and reading all the posts I realize I should have been more clear at the beginning.
When I stated everything had to be rebuilt I should have stated that many other performance modes were done to my rig. Just the custom ground roller cam and 2800 stall converter alone are worth alot of power.
Maybe my rig did not need to be completely rebuilt. But I have a warranty to back the work done by LPE. I do not mean just the 36/36 offered by Magn. on the SC alone, but a drivetrain warranty from LPE good for 24/24. Much of the work can be done at the dealer for LPE.
I will say this, if you go with just the SC you will probably have minimal problems as heve been expressed here. But, remember the transmission is a very weak link and it would be in your best interest to have it upgraded.
I say Go For It. You will be amazed at the difference. http://www.elcova.com/infopop/emoticons/icon_biggrin.gif

Black Lingenfelter Lux

[whipplecharged]

Ed,

When you take off from a dead stop and the vehicle doesn't take off right away that is the T/M and when it shifts and the vehicle does the same thing that is also T/M. The stock programming takes out 15-22 deg og timing neg. That GM's way of trying to save drivetrains. Instead it is a pain.

On superchargers, most have been set up for stock motors. Like the Whipple they run about 5 1/2lbs of boost to bring the HP from 316 stock toto about 435. You do have to run prem fuel but it does burn better and keeps eveything cleaner. This making the vehicle perform better and helping with increasing your fuel milage, even if not supercharged. When you use a twin screw supercharger like the Whipple you are going to get the power down low and you will use less throttle to do the same job you are doing now. This helping you increase your fuel milage and also getting the T/M out will help you to.

[TheGoodHummerMan]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by KenP:
"I will say this, if you go with just the SC you will probably have minimal problems as heve been expressed here. But, remember the transmission is a very weak link and it would be in your best interest to have it upgraded.
I say Go For It. You will be amazed at the difference." http://www.elcova.com/infopop/emoticons/icon_biggrin.gif<HR></BLOCKQUOTE>
Ken,

Thanks for the extra info... I see what you mean and that helps lessen my concerns. From reading about Lingenfelter, it sounds like THE first class way to go... http://www.elcova.com/infopop/emoticons/icon_smile.gif

I have seen prices of something like $3,000 (I think that's close?) for rebuilding the transmission and beefing it up for handling the extra strain imposed by a supercharger. That seems like a LOT?

How much would it cost to rebuild a transmission and beefing it up if after using the supercharger the transmission fails? Why not take the chance and just hope and wait? http://www.elcova.com/infopop/emoticons/icon_smile.gif

I think I have definitely decided to add the MagnaCharger supercharger!

Ed

[DocH2]

What does "below the curve" mean, anyways?[/QUOTE]

Horsepower and torque are usually draw in a curve configuration relative to RPM's.

Power "under the curve" as I understand it means that the curve is drawn higher up on the chart therefore said engine has more power "below" that curve line. If the line was drawn lower along the coordinate axis, there would be "less power under that curve".

Someone jump in here if they can make it simplier.

As for the SC question of too much strain on a stock 6.0? The stock engine isn't "engineered" for a SC. Therefore, with hard driving the system will fail sooner than without a SC. However, 5-6 psi of boost with the Magnacharger, Whipple or the Kenne Bell (which by the way looks like the best set up in some respects) is not much as my stock Volvo 740 Turbo ran 14 psi with a little tinkering (it was only 5 psi from the factory).

You probably can blow darn near 5 psi from your mouth into a stout ballon before it begins to expand. No need for extra valve springs unless you like to see 6000 rpms alot.

Just my two cents.

V

[DocH2]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by MAC:
Do they offer supercharged Hummer for test drive? $5K is a lot of money. If we can test drive a supercharged Hummer, I think we can pretty sure to tell if it is a fraud or for real or just maybe. I climb steep hill everyday and my Hummer is full of power, if I can test drive a supercharged Hummer, it won't go any faster (twisty roads) but maybe I can feel the surge of power that pin me to the seat, that would be good enough. I wonder if any Hummer dealer has one for testing?<HR></BLOCKQUOTE>

Mac,

I drop a friends H2 with the magnacharger about 6 weeks ago. Compared to mine...night and day. My stock 6.0 H2 still has it's tail between it's legs. I think, besides towing, the real difference is noticed with driving with the AC on at 65 mph and having to floor it to get ahead of the big rig that decided to merge into your lane when there isn't enough room to move sideways or hit the brakes without scraping the trailer.

Believe me, that 5 psi of boost makes a big difference (along with the reprogrammed computer).

V

[PARAGON]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by DocH2:
...Power "under the curve" as I understand it means that the curve is drawn higher up on the chart therefore said engine has more power "below" that curve line. ...<HR></BLOCKQUOTE>

I think you have nearly simplified it yourself. The curve is relative to RPM and power under the curve means that you get additional torque or horespower at lower RPM and that creates a "new curve" that shows more power generated at each RPM level in reference to before.

Think of a chart. On the vertical is RPM and and on the horizontal is your power ratings. Since it normally takes higher RPMs to reach the same level of power, the new curve after a positive modification shows more power at lower RPMs and therefore is under the original curve.

This is a layman's description from a layman. I am no car, engine, dyno, etc. expert nor am I an engineer, but this is just what I get out of the description of more power under the curve.

[DocH2]

Thanks Paragon. Horizontal and vertical were the words I was at a loss for. I wanted to use the "Y" and "X" axis but didn't think that would be appropriate for the forum as I get them confused all the time also due to lack of consistent use.

[H2 Passion]

H2 Bill

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> GM has been using this method of reducing drive train and transmission problems for several years now on their vehicles. Most other vehicles it happens right at the shift point but on the H2 it also occurs right when you need the torque the most. When you install the supercharger and don't eliminate the T/M it actually "magnifies" the problem.
<HR></BLOCKQUOTE>

I am a new searcher to buy a supercharger, do you mean here that we need to eliminate the T/M ?? or no ?

Elie

[H2 Bill]

H2 Passion, yes you want to eliminate it, and this is done through re-programming the PCM. If you don't and you install a supercharger it will not perform well at all. Most of the manufacturers include this reprogramming in their package, some at extra cost.

[H2 Passion]

H2 Bill,

I live outside US and my dealer told me i will be the first one who will install a supercharger. Wow, means he doesn't have experience!!

He has a Whipple SC in the stock and he can order a Magna SC if i want.

first i still confused which one i want, Whipple or Magna. I prefer the one with less problems and less visiting to the dealer everytime as he doesn't have experience with SC.

Maybe i will chose the magna as a it is a full kit like i saw in this forum...! your advise will be very appreciated.

Second: As i will be the first one who will install, so i will be the tester person for the dealer, i am afraid if he knows all the tips and tricks that needs with the SC, would you please tell me what i have to tell him and what i need to do or to buy additionally to the SC?
do we need to Better replace or rebuild everything else w/ heavy duty parts. Especially the trans. as KenP said?

Where i live, we have a lot of mountains and high speed road too and i do off-road.
I heard about the torque converter, do we need it also?


Thanks for your help

Regards
Elie

[HUMMERcustoms.com/TAZ]

Hi before stepping way out try these mods. Not like SC but if You are like me I needed a little more power and low end aceleration and got it. Plus about 1.5 MPG.
1)Cold air intake
2)Helix power tower throttle body spacer
3)ProFlash programer - it offers perf. mode, rv/tow mode., stock, and economy mode. I've tried all except economy which i will do soon, the programmer said it is not worth using that mode unless you are taking a long trip and then it will be a big help. I'm running perf. mode and it runs quicker. All these except stock do away with torque management control problem. I do not have all those weird done shifts and up shifts.
4)True duel exhaust. cut pipe at cats eliminating the x pipe and go with ?
(my choice was 2-40 series flowmasters with 3" all the way out from cats, except when I got to axle I had to drop to 2 1/2" to get over axle with 2 pipes. Which made Flowmaster tech happy.
5)I have ordered headers that will be jet hot covered to hold done engine compartment heat.
6)I'm checking into Granetelli MAF.
7)Bypass coolant to throttle body. Any good suggestions on doing this without buying all the kits You see?
8)Checking into 160 degree thermostat. Does H2 need this. It helped my truck but 2 totally different rigs. Need advice as to who i should get this from?
9)If Your a drive it a little guy like I do as I have a different every day driver and building it to compete in shows as I am (I know BO BO) If I want to go offroad I have good friends to let Me ride with them and I'm speaking of the people on this forum I'm sure would let me tag along on an outing. What every melts a guys butter it is your hard earned money. I'm looking at electric cooling fans. Do not use if offroading as I have been warned already on this site. Also let Me know what brand and model # I should use. I have used flex-a-lite in the past. I think KenP may answer this one.
You will be absolutely surprised how the beast will run!!!
Do the first 4 items first as they are the quickest to do.
I'm acually having problems with getting MAF as 05 models software is all new and they do not have a MAF to work yet. If you know different let me know. This was the same problem with programer. It just came out this month. I do not think Hypertech even has a programer ready yet for 05 H2.
All this is stuff that I did to My 99 Silverado with 5.3L If I took all the crap out of the bed and tool box no telling what it would do. It is a 2 wheel drive and I have the biggest tires I can get for it and i can smoke the tires for as far as I feel like it. It has HP's.
Hey if anyone sees anything I may want to try different please let Me know. I have a plan but it is flexible. Please You veteran's and guru's step up and fine tune my plan before I get our new member off in the wroung direction if you feel there is something new I do not know about, if you feel that may be happening
PLEASE HELP!!!! make sure We go in the right direction.
Thanks Very Much
Rick

[H2 Passion]

Rick,

Wow, it seems a rich solution but i think what you are doing is more complicated and less cheaper than a supercharger?

My target is: I want more speed and more torque power, because i like speed and also i like to by-pass the X5 and the Cayenne.

Elie

[HUMMERcustoms.com/TAZ]

H2 Passion
It is way cheaper and not really complicated. Intake took 30 min., throttle body at same time took 15 min., programer took 10 min., and exhaust took 1.5 hours. Header pro tells me about 2 to 3 hours. It is all he does is specialize in header application and install. Alot of the other I'll do myself. If You put it all together I guess a good 8 hours on it all. You let the pro do the work just tell him what you want. It will take a couple of months maybe not (could be by end of Dec.) to finish and then I'll get it dinoed. Nothing is as good as SC but I'm estimating less than 2 grand and pro's here are estimatimg going from 325 HP to 425 or 450 HP and they are leaning heavily towards the 450hp and a vast torque improvement, no up and down shifting anymore. These are estimates based on manufacturer HP gain and we shaved it down by rounding down numbers from factory. I feel confident I will get it in around 2 grand. Dino only rely knows hp and torque. In the first 4 items I have spent $960 and it made it feel like I was driving a different H2. Friends who had been in it before could not believe how it put them back in the seat. Out of the remaining the real help will come from the headers.

I really would like some input on the MAF, coolant throttle body bypass, and the 160 degree thermo.

I know electric fans will help as I noticed a big difference on My silverado when I put it on this past summer.

Guys jump in here and help me with the questions I have on MAF, Throttle body bypass and 160 stat. I know someone has had experience with those things.
Thanks
Rick

[KenP]

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> By Rick:
Guys jump in here and help me with the questions I have on MAF <HR></BLOCKQUOTE>I have been told, point-blank, not to waste my time or $$$ on that. Now that comes from folks in the Know http://www.elcova.com/infopop/emoticons/icon_cool.gif

[HUMMERcustoms.com/TAZ]

Ken I want your advice so I'm going to make sure I understand.
Your saying do not waste money on MAF,Throttle body spacer,and 160 degree stat. Did I understand correctly?
Thank You So Much for Your Input!!
Please write back if You have any other ideas and to confirm my understanding.
If you would like PM me on this.
Rick