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Any chance of a V8 or 6 Cylinder for the H3?

14 messages,  Last post on May 03, 2007 at 8:17 AM

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What is this discussion about? HUMMER H3, SUV


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#1 of 14
Any chance of a V8 or 6 Cylinder for the H3? by marka2k
Oct 26, 2006 (7:53 am)
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Last discussion I could find stated that a V8 was possible for the 2007 model year obvisouly has not happened yet. This is the only thing keeping me from purchasing a H3 can any confirm or deny any plans to add the V8 to the H3 model? and if so when can we expect it?
 
My first post so if I added this discussion to the wrong forum please accept my apologies
 
Thanks!
#2 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [marka2k] by steve_ HOST
Oct 26, 2006 (9:38 am)
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Replying to: marka2k (Oct 26, 2006 7:53 am)

Welcome Mark.
 
5 cylinders is sort of different. You could always go this route if more HP is what you are after:
 
Geiger Hot-Rods the Hummer H3 up to 325 Horses
 

 
I've seen scuttlebutt for a V8 next summer or for 2008. Nothing reliable though.
#3 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [marka2k] by leeharvey418
Nov 01, 2006 (8:50 am)
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Replying to: marka2k (Oct 26, 2006 7:53 am)

The 5.3 L V8 will be available sometime in MY 08.
#4 of 14
Thoughts by tired_old_dave
Jan 05, 2007 (8:43 am)
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Just came from a (diesel) turbo, no thanks. Supercharger uses hp to make hp, but hp is needed at top end anyway. v8 gets messy under the hood. And then there are the weight problems and that squashed exhaust pipe. Let's hope that smart engineers are in control at gm.
#5 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [leeharvey418] by tired_old_dave
Jan 08, 2007 (8:14 am)
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Replying to: leeharvey418 (Nov 01, 2006 8:50 am)

Will the v8 be the aluminum version used in the 4x4 trucks?
 
Will the torsion bars and leaf springs be increased and be able to be back fitted for '06 mods?
 
Is the I6 too long for the H3? With more hp/torque is a 4.10 or 3.73 diff coming?
#6 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [tired_old_dave] by bigd1960
Jan 08, 2007 (7:18 pm)
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Replying to: tired_old_dave (Jan 08, 2007 8:14 am)

HI, TO ANSWER YOUR QUESTION ABOUT A V 8 H3. THE PLANT WILL BE RUNNING A COUPLE OF NON SELLABLE UNITS WITH IN THE MONTH. THEN WILL START PRODUCTION IN FEB OR MARCH. THE V 8 WILL BE A 300 IRON BLOCK 5.3 LITER. IT WILL NOT HAVE THE CYLINDER DEATIVATION LIKE ON THE NEW SILVERADO. THEY MAY ADD IT LATER.
#7 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [bigd1960] by tired_old_dave
Jan 09, 2007 (6:53 am)
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Replying to: bigd1960 (Jan 08, 2007 7:18 pm)

Thank you. Also read other forums and their posts including those from the nikon camera professional.
 
Test drove a new tahoe before the h3 purchase-didn't think it had the right gas pedal feel(cyl deact?). Never drove one while at the cadillac dealer last year, but like another post somewhere, the cadillac tahoe with the 6.0 must be a nice combo. Never drove a trailblazer with the 4.2 either.
 
I assume all caps is for emphasis and is taken that way.
#8 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [tired_old_dave] by bigd1960
Jan 09, 2007 (8:24 pm)
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Replying to: tired_old_dave (Jan 09, 2007 6:53 am)

Sorry, I gave you some wrong imformation on the v-8 spec. it is 300 hp., but its aluminum, not cast iron.
#9 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [tired_old_dave] by leeharvey418
Jan 23, 2007 (5:44 am)
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Replying to: tired_old_dave (Jan 08, 2007 8:14 am)

I think your engine questions have been answered.
 
I can't speak to the torsion bars themselves, I would imagine that they have indeed been upgraded. I would be very surprised if you couldn't retrofit H3 V8 torsion bars to an I5 model, though GM probably wouldn't recommend it. As for the leaf springs, there is no difference in mounting hardware between I5 and V8, so even if the spring rates have been increased, retrofitting would be no problem whatsoever.
 
The I6 has to be too long for the 345/355, since that would be the obvious and easy way to upgrade power (if it did fit).
 
I haven't the foggiest idea what GM's product planners have in mind for axle ratios, but given Hummers reputation for poor fuel economy, I would be shocked if a production vehicle was sold with anything other than an extremely tall rear end. If anything, more power would prompt them to go even taller still.
#10 of 14
Re: Any chance of a V8 or 6 Cylinder for the H3? [leeharvey418] by tired_old_dave
Jan 23, 2007 (7:44 am)
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Replying to: leeharvey418 (Jan 23, 2007 5:44 am)

Thank you. Probably will leave better_half's daily driver alone. Maybe do intake/exhaust mods later. From the factory only have 853lbs of capacity remaining on the chassis as it stands. Need those bars and springs. Will not crank up the torsion bars.
 
Wanted to wait for the new 2wd silverado with a locking rear but our previous ride was eating our lunch and not trustworthy and so the H3. Old school-like body on frame, push rod, and etc.

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