Hi, new to the board and planning to purchase a H3 in the summer. Does anyone know if there are any plans to offer a Chevy small block V8 in the 2007 model year?
Thanks.

Hi, new to the board and planning to purchase a H3 in the summer. Does anyone know if there are any plans to offer a Chevy small block V8 in the 2007 model year?
Thanks.

Search the forum.....there was thread awhile back all about that. From what I remember there will not be a V8 for 07.

From what I recall, nothing definite on a bigger engine but the '07 will have more HP out of the same engine.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by NJH3:
Hi, new to the board and planning to purchase a H3 in the summer. Does anyone know if there are any plans to offer a Chevy small block V8 in the 2007 model year?
Thanks. </div></BLOCKQUOTE>

I doubt it. You run much more hp or torque, the H3's going to need substantially upgraded drivetrain components. A well built V8 will break anything less than one ton gear off road. The H3's weight, combined with locked diff and axles means that one tire and axle shaft would be subjected to the entire torque of the engine. They'd have to move the whole drivetrain from the H2 to the H3. Anything less than the 6.0 from the H2 wouldn't interest me. I'm sold on the current features of the H3. With it's awesome gear reduction, the engine available will pull it until it's so steep that only velcro will help. A great balance of horsepower and gearing is already engineered into the H3. You get more horsepower with the current drivetrain, you're going to be breaking stuff. It'll go faster but for me, and that's the important part of my statement, for me, that's not what I bought the H3 for. Considering the package, as a whole, as it was designed by Hummer, they must've thought the same way. They had other engines available, MANY others, and they chose the 3500. It works. It's not glitzy, it's not exciting, it's not fast, it works. Kinda like a hammer.

Will the 07 use the same block with a different head/cams/ compression/ and intake and exhaust manifolds to generate more power ? Or will it be an add-on like a Turbo or SC? Thanks.

Don't know exactly how they are getting the added HP but I would say no on it being a Turbo or SC. I think it is only going up about 25hp. fstop has driven one but I don't think he is allowed to say any more than that.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by HummerNewbie:
Don't know exactly how they are getting the added HP but I would say no on it being a Turbo or SC. I think it is only going up about 25hp. fstop has driven one but I don't think he is allowed to say any more than that. </div></BLOCKQUOTE>

I was told that in 08 the 5300 v8 is going into the H3 with 295 HP.Diesel in 07 V8 in 08.

Damn First Hummer, who told you that?
http://hometown.aol.com/f5fstop01/im...orlaughing.gif

To the original question, you won't see a V8 in '07. Maybe a diesel late in the model year. As for the disbeliever on the drivetrain components, if, and I do say if (small if), a V8 is installed, it will have the same axles and Tcases; won't mention the trans, but if it is different it is not due to torque, but for fuel mileage...all I will say on that. And guess what; they can handle the additional torque and HP. The drivetrain components are a lot heftier than people think.
Ask me how I know. But I can't say. (I believe we have already had this discussion, and we hopefully, we both agree to disagree.)

As for the statement about the H3 having a great balance of HP and gearing already, that I agree with 1000%. In my opinion, the reports of it being underpowered for on-road use, and for off-road is greatly exaggerated. No, it won't do over 99 mph, no it won't do 0-60 in under 8 seconds, but then again, it is a large vehicle that has enough power to pull away from a light with dignity, merge on an interstate with authority, and climb mountains like a Rocky Mountain Big Horn Sheep; and it does it in great comfort. That is all I ask for in this vehicle.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by f5fstop:
Damn First Hummer, who told you that?

To the original question, you won't see a V8 in '07. Maybe a diesel late in the model year. As for the disbeliever on the drivetrain components, if, and I do say if (small if), a V8 is installed, it will have the same axles and Tcases; won't mention the trans, but if it is different it is not due to torque, but for fuel mileage...all I will say on that. And guess what; they can handle the additional torque and HP. The drivetrain components are a lot heftier than people think.
Ask me how I know. But I can't say. (I believe we have already had this discussion, and we hopefully, we both agree to disagree.)

As for the statement about the H3 having a great balance of HP and gearing already, that I agree with 1000%. In my opinion, the reports of it being underpowered for on-road use, and for off-road is greatly exaggerated. No, it won't do over 99 mph, no it won't do 0-60 in under 8 seconds, but then again, it is a large vehicle that has enough power to pull away from a light with dignity, merge on an interstate with authority, and climb mountains like a Rocky Mountain Big Horn Sheep; and it does it in great comfort. That is all I ask for in this vehicle. </div></BLOCKQUOTE>

fstop,I was talking with the service Manager a few weeks ago about the V8 and he told me that you will see the 5300 V8 in 08.You can take that as far as you can throw a BCM Module oh **** wait i need that.

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by First Hummer:
fstop,I was talking with the service Manager a few weeks ago about the V8 and he told me that you will see the 5300 V8 in 08.You can take that as far as you can throw a BCM Module oh **** wait i need that. </div></BLOCKQUOTE>

Only kidding. I believe it was already mentioned on this site. I just cannot either confirm or deny.

the thing is.....if ya want a v8 in this thing, ur basically looking at a smaller h2 with a little better gas mileage.
i think everyday driving were getting 16-18mpg maybe? what will ya get with the v8? between 12 and 14 maybe?
not to mention when u put bigger tires on it like me....i already cant afford the gas.
i like to see more options for vehicles, but i wonder if the same people who are beating their chest now for more power will be some of the same people whining abt gas mileage later on..

evomind,

See your point on gas mileage, yea it looks like many of us are seeing around 15-17mpg (my personal experience over 8000 miles so far) on a regular basis with our H3's. More cubic inches will definitely mean more gas consumption. And GM financially is a debt-ridden disaster with limited resources for spending on nice to have projects.

If I wanted a faster on-road SUV, there were plenty of choices when I bought the H3 and traded my faster Highlander.

Steve

<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:
evomind,

See your point on gas mileage, yea it looks like many of us are seeing around 15-17mpg (my personal experience over 8000 miles so far) on a regular basis with our H3's. More cubic inches will definitely mean more gas consumption. And GM financially is a debt-ridden disaster with limited resources for spending on nice to have projects.

If I wanted a faster on-road SUV, there were plenty of choices when I bought the H3 and traded my faster Highlander.

Steve </div></BLOCKQUOTE>

Man, I'd love to see 15-17mpg from my H3. I can't seem to break 13mpg. Am I totally in the minortiy here or is anyone else getting lower than expected mileage?

I generally get about 14.5 in city and 17.5 on the highway. I can't complain too much about that.

The lower milage on a possible V8 doesn't drive me away (so to speak) it's more the additional cost of a larger block engine. If I was doing any towing maybe my opinion would change, but I'm more than happy with the I5, I think it gets the job done.

Do not think that the V8 has to mean less mileage. The new Tahoe is rated at 20mpg on the highway with a V8.

i get about 200 miles from full to warning light. i think i was getting 220'ish b4 the lift and bigger tires. im not sure what 200 miles equates to in mpg, keep forgetting to check.
as far as tahoes being rated at 20 on the highway, all that rating means is that its humanly POSSIBLE to achieve that. real world its probably closer to 17.5 cause ur not gonna drive at 55mph steady the whole time.

Point is that it is poss to get ratings that are decent for a V8. The DOD system really helps.

DOD can really help only the highway mileage. Tahoe 4wd is rated at 15/19 which is pretty good considering 5200 pound curb weight. But it has better aerodynmaics, taller gearing, and all season street tires. Tahoe is not a Hummer.

You want a fast and economical SUV, check out the upcoming Toyota Rav 4 with the 268 hp V6. But Rav 4 is not a Hummer.

It would be interesting to see how a 5.3L V8 could be crammed into the stubby front end of an H3. Maybe a custom builder could do it to build a sleeper road SUV. But I can't imagine what that lump of cast iron would do to the offroad dynamics of the H3.

Re: H3 w/ V8 in near future?
 

So IF GM were to use a different transmission, IF they were putting in a 5.3L V8, would they bump up the transmission from 4- to 6-speeds to improve fuel economy?

Michael

Re: H3 w/ V8 in near future?
 

Re: H3 w/ V8 in near future?
 

Hey the V8 might happen in the H3 just in time to coincide with $4.00+ per gallon gas prices.:D Not necessarily the path to significantly increased sales.

S.

Re: H3 w/ V8 in near future?
 

WHy? :D http://elcova.com/eve/forums

Re: H3 w/ V8 in near future?
 

Atleast it wasn't me.:D :D :p

Re: H3 w/ V8 in near future?
 

For a while I thought I was going crazy....Glad to hear others are suffering from these ancient threads appearing out of nowhere.:D

Re: H3 w/ V8 in near future?
 

I always get over 300 miles and my light has not gone on yet.
My wife dont think it works:eek: It does because it takes less than 20 gallons .:D

Re: H3 w/ V8 in near future?
 

I get 225 miles....

Re: H3 w/ V8 in near future?
 

I got 362 once, and I was sweating...:D

Re: H3 w/ V8 in near future?
 

...that's it, I'm going back to stock form!!!! :mad: :D

Re: H3 w/ V8 in near future?
 

Eastbound Colorado/Kansas, speed was between 75 and 80, best fuel mileage of the trip:D Kept telling my kid that he was young and strong and that pushing a H3 on flat ground would not be too bad.:D

Re: H3 w/ V8 in near future?
 

23 gallons w/3.5L I5 is a decent sized tank compared to some setups.

S.

Re: H3 w/ V8 in near future?
 

my best was about 350 or so. Last tank was 246 (towing a trailer for most of that tank), usually around 300 or so.

What bites is my brother just got back from a trip to Tahoe. He's driving a 2007 GM 1500HD w/6" lift and 37" tires. His average mpg for the whole trip was ~15.5 mpg. As good or better than my H3. wtf?:mad:

Re: H3 w/ V8 in near future?
 

Returning from Tahoe at 6300 feet is all almost all downhill and the howling tires make so much noise that his wife makes him drive slow.:D Good for an isolated case of good gas mileage. I've hit 18mpg in my H3 just by keeping it below 70mph and that was in hilly terrain.

S.

Re: H3 w/ V8 in near future?
 

I agree. If you ever wonder why the H3 downshifts so much from 4th to 3rd, it's because of the shift speed versus %TPS data. Here is this data from a colorado I5 (which is very similar to the H3). It's complicated, but if you look at it enough it will break apart. Assume you are applying 19% throttle, you'll shift into 2nd gear at 17.9 MPH, then into 3rd at 32.6 MPH, then into 4th at 44.1 MPH. If you blip the throttle by about 12 - 13% (to 31% throttle) the H3 will kick down to 3rd. This is why the H3 downshifts so much - not saying good or bad design - just saying why it does. It takes a bigger throttle blip (20% or more) to downshift from 2nd and 3rd. With a 5.3L, the downshift %TPS can be moved higher and the upper gears (lower engine RPM and lower parasitic losses) can be reached at lower RPMs. I feel that the 5.3L could have the same or better fuel economy as the I5 especially with DOD. I'd even consider 4.11:1 diferentials and a lower low range gear for better fuel economy and the same off road gearing.

Re: H3 w/ V8 in near future?
 

In short a V8 has the potential for slightly better highway mileage, that would be great. No way it's going to have better city or combined mileage though.

S.

Re: H3 w/ V8 in near future?
 

This data is directly from the Chevy website for Silverado 1500 trucks. The 4.3 L V6 (195 HP, 260 lb-ft) 4x4 with a 4-speed auto gets 15/18 MPG city/highway.
The 5.3 L V8 (295 HP, 335 lb-ft) 4x4 with a 4-speed auto gets 15/19 MPG city/highway.

This is just one example of no loss in city MPG but better highway MPG.

Re: H3 w/ V8 in near future?
 

Good to know about possible similar mediocre gas mileage with a V8. Key word is possible since Hummer aerodynamics and tire selections are unique which impact highway mileage. And all the 4wd trucks listed above have lower city mileage than the H3.

Note 2006 H3 EPA mileage (all H3's have 4wd as standard for a reason):

16/19 auto
16/20 manual


S.

Re: H3 w/ V8 in near future?
 

I was told by a friend of mine that the H3 will definitely get a V8 engine in Fall 2007. My friend works for GM in Detroit at the tech center, and he confirmed this information from the program manager for this line. Also there will most likely be another engine upgrade, E85 option, in 2010.

Bill

Re: H3 w/ V8 in near future?
 

displacement on demand people!!!:dancingbanana: