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  #1 (permalink)  
Old 10-02-2005, 08:42 PM
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GM Gen III/IV V8s

I know what the differences are between the Gen I and II small blocks and the differences between the Gen I/IIs and Gen IIIs is a no brainer but do any of you know what the difference is between a Gen III and a Gen IV? Like how is a Gen III 6.0L different from the Gen IV 6.0L used in the C6 Corvettes, 05 GTOs, etc...

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Old 10-02-2005, 09:04 PM
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the most I could find was this: "Subtle differences include the crankcase vent moved to the top of the valley, relocated knock sensors and the cam sensor moved to the front of the engine."

Last edited by Ghetto Jet; 10-02-2005 at 11:15 PM.
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Old 10-03-2005, 10:11 AM
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diferent HP and torque numbers. i believe 1 has a reverse flow cooling system. i think. not too sure on that one. but other then different little tweaks and mods nothing major.
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Old 10-03-2005, 01:39 PM
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GEN III Vs GEN IV

One of the major differences is the bore spacing. I believe that has changed slightly. Also they have gone from 24X to 58X crank shaft encoders. The control logic has completely changed as well.

FYI - You can not put a L76 (high flow head) on a GEN III!
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Old 10-03-2005, 01:48 PM
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hmm... sounds like we need a GM rep to answer this one... i'll see what i can dig up....
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Old 10-03-2005, 05:52 PM
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It was in hot rod or car craft last year, and I didn't think the changes justified calling the engines a different "generation", but then, I'm not a GM engineer. I'll see if I can dig something up.
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Old 10-03-2005, 05:55 PM
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Here you go:

http://www.hotrod.com/techarticles/e...ls2/index.html
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Old 10-03-2005, 09:47 PM
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GM customer service is supposed to email me tomorrow on the major, and minor, diferences of the Gen 3 and Gen 4 6.0L. after i get the response i'll post it....
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Old 10-04-2005, 09:28 AM
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Contacts Contacts

To further the search for the truth I contacted a few friends: One is the small block dyno lead, one is lead calibrator, and one an emissions calibrator. Let see what we can dig up!
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Old 10-04-2005, 10:51 PM
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WELL! i have just decided that the GM engineers were stupid and dont know anything. here is what they told me about the diferenc e between the Gen 3 and Gen 4 6.0L engines......Dear Mr. Ross,

Thank you for contacting the Chevrolet Customer Assistance Center. I appreciate
you taking the time to write us in regards to your 6.0L engine inquiry.

I apologize, but this information is too broad for a specific answer. Also,
some of the differences are inconsequential or a matter of opinion. For public
information available on our engines, I recommend looking around on
www.gmpowertrain.com and www.media.gm.com.

We here at the Customer Assistance Center do not have access to technical
information. Our function at the Customer Assistance Center is to act as
liaisons between the dealership and their customers in the resolution of vehicle
concerns. We rely on our dealerships, which have first-hand knowledge of a
particular vehicle, to answer technical questions that are specific to a
vehicle. They would be your best source for information.

If you are unable to find the information on the web, then I suggest contacting
Public Relations. They would be better able to either answer your question or
direct you to whom you need to speak. Please write to our Public Relations
Department at the address below. I apologize, but there is no direct e-mail
address for that department.

Chevrolet
Public Relations
100 Renaissance Center
Communications
P.O. Box 100
Detroit, MI 48265-1000
..........


too specific????? ***... are these people stupid??? they just lost a chevy customer... im switching to Ford. at leasty they know whats going on in their developments.....
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Old 10-05-2005, 12:08 AM
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Quote:
Originally Posted by 97Z28
WELL! i have just decided that the GM engineers were stupid and dont know anything. here is what they told me about the diferenc e between the Gen 3 and Gen 4 6.0L engines\..........


too specific????? ***... are these people stupid??? they just lost a chevy customer... im switching to Ford. at leasty they know whats going on in their developments.....
That's not the engineers, it's the PR folks who use generic cut-n-paste messages. Perhaps we need to infiltrate GM to access the engineers.
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Old 10-05-2005, 12:29 AM
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lol... they TOLD me it was the engineers... thats what i what going on...
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Old 10-05-2005, 02:18 AM
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I would be willing to bet that if you contacted ford's customer service, they would be unable to answer specific technical questions or put you in touch with engineers, either. I posted a link to a Hot Rod article where the differences are laid out pretty well.
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Old 10-05-2005, 11:34 AM
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yeah. i read that articly. its very informative. your right... ford or dodge customer service is probably the same way. it just made me mad that they would tell me the question was too specific...
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Old 10-05-2005, 08:44 PM
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I know the block has had some oil galley changes around the rear cam bearing. I think they eliminated the windowed mian bearing saddles as well.

I think.
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