Dmax for the H3?

[Huck BB62]

Anyone convert this stuff? Baby D-max These guys are the same people that decided the I-5 was suitable. I'm wondering what the hp, torque, and better yet, the mileage would be with the baby dmax in the H3. I really wouldn't mind the slowish engine if I got 25mpg or better but our Denali gets within one mpg of our H3 and it's engine is a hoss. The I-5 is adequate but it just doesn't make sense.

[Huck BB62]

I did some homework, the 3.0 Dmax is rated at 146 bhp @ 3600 rpm and 214 ft/lb @ 1400 rpm. Properly geared, it'd do ok, but no better at performance on the road. Offroad, it'd be killer, you could lug it like no tomorrow. The question is this: What kind of mileage will it get?

No thanks, don't need a slower motor in my H3 on the road, where most H3's get used 90%+.

S.

[Ma\'Deuce]

I'm a long way off from beeing a "gearhead", but my opinion is that a dmax would be as slow if not slower on the road, but as stated, would be unstopable off road. I agree Steve, i don't want anything slower. With the weight of the truck, the I-5 decision was just plain weak. gets you where you want to go, but not very efficiantly. I don't like any of the six's gm has to offer so the vortec 8 gets my vote. There was never a lack of power when needed in previous trucks and an avalanche. I would even argue that an 8 would be more efficient than an I-5 in that it wouldn't have to work as hard to get your H3 from point a to b. does that make any sense? my $0.02.

[Huck BB62]

I agree wholeheartedly. Our '03 Yukon with the 5.3 got a mile and a half worse mileage than our '05 Denali with the 6.0. The 5.3 would be a great engine in the H3, the 6.0 would be better! (it takes the same room) The H2 needs the Dmax, but it'll never get it because it needs that big honkin' tranny to live and would intrude into the passenger compartment too much.

What the H3 REALLY needs is a 5 liter six cylinder Dmax with the equivalent hp and torque per cylinder as it's big brother. Now THAT would be sweet!

Huck and Ma'Deuce,

Yea I do have the defect of being a bit of a gearhead roadie type. And you guys bring up valid points about how an understessed big V8 gets only slightly lower mileage than the I5 which is forced to run at higher revs via a heavy foot.

But keep in mind that the H3 is true to the Hummer offroad criteria. Putting a large lump of lead (I mean a big cast iron V8) into the front end of a relatively small SUV does terrible things to the overall balance/weight distribution, approach angle, front overhang, etc. But would make a mean bling-bling street sled.

S.

[Huck BB62]

So just how much does an 6.0 all aluminum LS2 weigh compared to the 3500? How long is the V8 compared to the I-5?

Originally posted by Huck BB62:
So just how much does an 6.0 all aluminum LS2 weigh compared to the 3500? How long is the V8 compared to the I-5?

Good question and that would be nice, but we know it's longer and heavier and it's got to fit in that little H3 engine compartment with a lot of other resulting bigger/beefer stuff. How much, maybe somebody knows or can look it up...

S.

[TNTH3]

I am sold on the Duramax after an event the other night. A large wrecker weighing 52000 lbs ran out of fuel while towing a cab over tractor on fairly steep grade. The guys couldn't get the truck back going. They had a new Duramax and hooked the chain to the big trucks. The tires slipped 2 or 3 times on the initial start and after that they chugged on up the hill. It would have made a great commercial.

[Huck BB62]

Originally posted by Steve-SanJose-H3:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Huck BB62:
So just how much does an 6.0 all aluminum LS2 weigh compared to the 3500? How long is the V8 compared to the I-5?

Good question and that would be nice, but we know it's longer and heavier and it's got to fit in that little H3 engine compartment with a lot of other resulting bigger/beefer stuff. How much, maybe somebody knows or can look it up...

S. </div></BLOCKQUOTE>

Just wondering because one of the very first things a lot of people do is add almost 200lbs to the front of their H3s with a brush bumper and winch. How'd a V8 be longer? Physically, I think it's very doable, I own both engines. Just eyeballing it, the 6.0 is a compact engine. It's no big block, it's short, not very wide. Heavy? The danged H3's a boat anchor already. Change or torque the bars on it, done.

I keep bringing this up because I drive my H3 a LOT. I live in the mountains. I have to pass people a lot, and I drive from near sea level to 4200' every day. If I were on my own, no other traffic, I don't think it would bug me that bad but I have to torture the little engine to death. My last tank was 15mpg. Our Denali gets that good a mileage. When you read the news about the 3500 they talk about one of the reasons for it being better mileage. That isn't the case at all. Same driver, same route, same habits, the H3 gets worse mileage than an '05 Denali and MUCH worse mileage than an '02 Sierra 4x4. When they resolve this issue, I'll be first in line at trade in day.

Yeah, it's complaining but remember this before any of you tell anyone to quit whining about the engine, unless GM knows it's not good enough, it won't get better, sales will suffer, and they're gonna go away. Our local Hummer dealer is being kept alive by the H3 sales. The H3 gets better mileage than the H2, but that isn't saying much. What's needed is some minor thinkin' here. GM has the engines, they have the H3, put the two together. Exceeding expectations is what sells, not being adequate.

How happy would you be if you had a nice aluminum 6.0 LS2 in your H3? It'd flat haul butt and have gobs of low end torque to boot. Sign me up.

Originally posted by Huck BB62:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Steve-SanJose-H3:
<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Huck BB62:
So just how much does an 6.0 all aluminum LS2 weigh compared to the 3500? How long is the V8 compared to the I-5?

Good question and that would be nice, but we know it's longer and heavier and it's got to fit in that little H3 engine compartment with a lot of other resulting bigger/beefer stuff. How much, maybe somebody knows or can look it up...

S. </div></BLOCKQUOTE>

Just wondering because one of the very first things a lot of people do is add almost 200lbs to the front of their H3s with a brush bumper and winch. How'd a V8 be longer? Physically, I think it's very doable, I own both engines. Just eyeballing it, the 6.0 is a compact engine. It's no big block, it's short, not very wide. Heavy? The danged H3's a boat anchor already. Change or torque the bars on it, done.

I keep bringing this up because I drive my H3 a LOT. I live in the mountains. I have to pass people a lot, and I drive from near sea level to 4200' every day. If I were on my own, no other traffic, I don't think it would bug me that bad but I have to torture the little engine to death. My last tank was 15mpg. Our Denali gets that good a mileage. When you read the news about the 3500 they talk about one of the reasons for it being better mileage. That isn't the case at all. Same driver, same route, same habits, the H3 gets worse mileage than an '05 Denali and MUCH worse mileage than an '02 Sierra 4x4. When they resolve this issue, I'll be first in line at trade in day.

Yeah, it's complaining but remember this before any of you tell anyone to quit whining about the engine, unless GM knows it's not good enough, it won't get better, sales will suffer, and they're gonna go away. Our local Hummer dealer is being kept alive by the H3 sales. The H3 gets better mileage than the H2, but that isn't saying much. What's needed is some minor thinkin' here. GM has the engines, they have the H3, put the two together. Exceeding expectations is what sells, not being adequate.

How happy would you be if you had a nice aluminum 6.0 LS2 in your H3? It'd flat haul butt and have gobs of low end torque to boot. Sign me up. </div></BLOCKQUOTE>

Sign me up for the 6.0 too, I will gladly pay the gas bill too And I hope I live to see that option. GM is a the verge of going bankrupt and the H3 is one of their few current success stories, so I doubt that the 6.0 will be a near term priority. They've got some bigger problems to fix throughout entire divisions.

Obviously the H3 is biased towards offroad capability and the onroad performance/highway efficiency suffers as a result.

S.