What do you think of this engine performance upgrade?

[Cesardajr]

I came across this website that does performance upgrades on hummers, do your think this would be a good set up? do you think the price sounds fair?
Check out the site
http://www.dynotech-eng.com/h2_6_liter.htm

[robb]

I think its funny that you pay almost $6000 for the upgrades but they want to charge you $46.95 for a 160 degree thermostat!!!

[tomp]

It's basically just a head upgrade, cam and come cleanup work with custom mapping. You'd be much better off springing for the supercharger for close to the same price.

[HUMMERcustoms.com/TAZ]

I agree with tomp you would be better off with Magnuson supercharger at 5 or 6 lbs. of boost which will not hurt a H2 at all. What they are offering is a really good air flow improvement but, you got to flow more air to really get the great benefit from the kit. It would help if You could go to ram air but, that is a completely new set of difficulties. What they offer is something I would do at some point after I added a supercharger to push more air and fuel to justify their kit. Play with a supercharger for a little while then go and have their kit done and run your boost from 5 or 6 lbs. up to about 15 plus lbs. of boost and see the screamer you will be strapped to. I suspect though You will for the money be happy with supercharger.

You can search and find suggestions I have made many times but, Dragon and I are running the stock 6.0L engine with supercharger at around 5 to 6 lbs. of boost along with some good tuning, good air intake, and header catback system with true dual exhaust, 160 degree T-Stat, electric fans from a 3/4 Gm truck and get around 550HP at the ground. This is with no internal mods and no tranny add-ons yet but, they are coming soon. Just aftermarket add-ons but, will improve a great deal more once i get my hands on it and do some real good tuning once Dragon is finished with the electronic upgrades. What he is doing is important to Our working to get as close to 1000HP to ground with no internal mods just stock except for add-ons. Will of course be adding water/methanol inj. and co2 spray to aftercooler as well as an old fashion ice bucket with fuel line running through it.

Lot's of tricks to get whatever a person is looking for but, requires dedicated study from leaders in performance industry or at least having good people in town that do not mind sharing info. If need be to get to the 1000HP We will most likely go with a ported LS6 set of heads, LS6 cam and some more compression pistons that have been introduced by Performance Products who made the Diablo programmer as well as many other niche type items.

Well You know the old saying anyone can go as fast as they want but, they just have to spend the money or know how to do it yourself.

Follow tomps advice i would say.

TAZ

[Boar-Ral]

What I found amusing was, "This performance package will increase power significantly, while still maintaining the OEM drivability and fuel mileage that you expect and still leave room for future performance enhancements at a later date."

What fuel mileage?

[HUMMERcustoms.com/TAZ]

Boar-Ral
I love Your comment it is on the money. Not just what is the factory performance. Anytime You make a change to an engine that let's it breath better and which in turns requires more fuel or you run to lean and burn pistons's you will lose fuel economy. Guys if You are looking for more power and better MPG that is the Holy Grail. I have not been able to run the numbers on Our rig to even see that it is able to be done yet but, I will try.

Do not get me wrong the manufacture has ways to get power and MPG it is not to their benefit quite yet to spend the extra money but, if You do it the aftermarket way it is not likely You will gain MPG just due to the basics on how an engine functions. Small = MPG Big = bad MPG.
Make engine able to flow more air means more fuel, only way it can work or it is to lean and blows up and it hurts small engine MPG also.

It is why i have to look at running 120 octane, change to colder spark plugs, adding water/methanol inj. and cool down the supecharger aftercooler is because i'm forcing more air and more air needs more fuel and you have to mess with timing as well as all the other stuff so the engine does not detonate. I'm guessing but, when i get to that point for speed runs may run pure methanol by then also but, MPG will be -20 who knows. But, if You work with people who know what they are doing they can do as i'm doing and use tuning software that costs more but, i can store tunes for pump gas with supercharger to the most extreme and all i have to do is add water/methanol inj. or co2 spray on aftercooler and anywhere in between. I'm going to even see just how much i can down tune the H2 with software for travel on HWY. as supercharger has bypass valve so that if no boost is required it takes only about 1/3 of a HP to turn supercharger. Do not get on it runs like factory sort of maybe better. I'm going to play with it. But. as Roar-Ral I'm sure is thinking hey with the H2 You are starting in a hole to begin with. Do not get sucked into thinking there is a magic cure for poor MPG on large engine in a 8000lb. rig unless they add diesel or go to the 4-6-8 engine cutout on the H2. Those of Us with what we have now live with the 10 to 12 MPG unless someone comes up with a miracle.

Me i just want to see what the H2 can do when pushed hard if all the sponsors fall in line as they say they are. If not I will still most likely do it if I can get it together in time. Dragon and I have a few sponsors We are tied to this summer so will steal time from Us, then it will be free to just show for Motorsportsauthority/HUMMERcustoms and blow it up if we want.

Go to HPTUNERS.com and read what the tuning software did with just tuning on a stock car he has. When You see the pic I think the right front wheel is off the ground and he is running in the 10's. He did it to prove what good tuning can do for a stock vehicle and they have kits for laptops to go with any level you want to go to. With mine I'm having to add tuning with a full time wideband logger and 3 bar density that let's us run up to 30lbs. of boost so you fool the PCM into thinking it is getting the air and stuff the MAF would be telling it is but the MAF will not read the amount of air flow we pull through. It takes a little time to learn it but there is a great forum that the owners actually help monitor and answer questions. MSD liked the tuning enough that they made a deal to help them with Ford and Dodge tuning which MSD has patent on and asked them to put the new tune that will be or may be already in the Superchips programer because MSD bought superchips or owned them, they are a seperate division. HPTUNERS provides tuning for them. There has been questions as to what tuner anyone would buy. I know which hand held I would buy knowing about the laptop serious tuning i have been using and getting up dates almost faster than i can download them. HPTUNERS stays on top of business.

TAZ