? New engine in 2008
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Originally Posted by shopdog
GM Performance Parts has already released a line of performance parts for the L92. It is starting to generate quite a buzz in the race engine building community. The block is a strong design, and the (2V) heads have a favorable port configuration. The L92 is particularly well suited to supercharging. I think it will do well.
http://www.gmgoodwrench.com/perfpartsjsp/home.jsp
Which performance parts are they offering for it and where can they be found?
Advanced
Joined: Apr 2006
Posts: 96
Likes: 0
Originally Posted by DSOM Z51
The initial purchasers will be the only ones who can answer that. And it is too early for even them to tell us.
You pays your money, you takes your chances. For an additional 20 RWHP, I let them test it.
You pays your money, you takes your chances. For an additional 20 RWHP, I let them test it.
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Originally Posted by ZBoater
I'm confused - doesn't the Z51 have the exact same power as a base C6? Did I miss the memo? As far as I know, suspension, coolers, stickier tires, chrome wheels and a badge have nothing to do with power. Or is there some humor here I am missing? 
None of what you listed increases under the hood power. But some of what you mentioned, along with more aggressive gearing in the manuals, significantly improves overall performance.
The humor is that he feels that he can "trump" these by "trading up" to an '08 Vette with a new engine in it, for a 5 figure difference in the trade/sale of his "present" car and the new car,.... all the while adding a whopping 20 more RWHP in the process.
20 more RWHP that he is not going to use for performance driving himself mind you, but 20 more RWHP that he plans to use for "bragging rights."
On the conservative side of that, even if the transaction "only" cost him 10 grand, you're looking at about $500.00 per horse.
I can go out and by a "real" horse for that kind of money.
Racer
Joined: Oct 2004
Posts: 493
Likes: 0
From: Sacramento California
St. Jude Donor '06
How soon they forget....
How many people said they would never buy a new model year when the C6 came out? Do you want to be the first to buy GM's new flex fuel/DOD/overhead cam/direct injection LS-X? Good Luck.
Not me, I'll keep my '07 thank you very much.
Al
How many people said they would never buy a new model year when the C6 came out? Do you want to be the first to buy GM's new flex fuel/DOD/overhead cam/direct injection LS-X? Good Luck.
Not me, I'll keep my '07 thank you very much.
Al
Last edited by Gov'sGuy; Sep 10, 2006 at 11:22 PM.
Burning Brakes
Joined: Jul 2000
Posts: 761
Likes: 0
From: Tucson AZ
Our man on the inside!
......Thanks Shopdog, Your well laid out, unpretencious explanations of technical highlights gives the Forum a class quality. If ever there is an award given to Forum members..............
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Originally Posted by shopdog
GM Performance Parts has already released a line of performance parts for the L92. It is starting to generate quite a buzz in the race engine building community. The block is a strong design, and the (2V) heads have a favorable port configuration. The L92 is particularly well suited to supercharging. I think it will do well.
TTT, second request
I just checked over there and did not find any.
http://www.gmgoodwrench.com/perfpartsjsp/home.jsp
Which performance parts are they offering for it and where can they be found?
Please show the web location for this line of performance parts which have been released for the L92 engine, as I am quite interested in seeing what the offerings are. Are they headers, camshafts, heads, rockers, springs, intake manifolds, air intake systems, superchargers ????
Also, is there tuning available following the installation of these parts and who is offering it???
Team Owner
Joined: Aug 2004
Posts: 24,129
Likes: 1,038
From: The Beautiful Pacific Northwest
St. Jude Donor '05-'06-'07-'08-'09, '14-'15-'16-'17-'18
Originally Posted by DSOM Z51
BTW, does anyone here remember the old Cadillac V8,6,4 of the 70's? 
Burning Brakes
Joined: Nov 2004
Posts: 771
Likes: 0
From: Erie County, Pennsylvania
Originally Posted by OregonC6
Thinking back about ground pounding big block vettes of the past I think 435 hp has a really nice ring to it!
I can't wait! I have decided to buy my next C6 in 08 and not 07 due to roof thing not being fixed and engine rumors. Imagine! Anyone buying a BASE '08 with 425hp will have a faster car than any stock C6 Z51 built in 05, 06, or 07!
Chew on that one Z51ophiles. Then you will all be driving the next best thing to a base '08 C6. Oh , the humanity. Grief counseling should be immediately sought in such a situation. I want a 425 hp badge from the factory just to make the point. 425 will trump 400 even with the tiny difference in manual gears. I love it. You may want to peel off your stick on badges.
The 3V sounds good and hopefully the engine will be flexfuel or even E85. This will make the car much more forward directed. Displacement on demand would be good too. Engine advances like these will slam the resale value and desireability of 05,06. and 07 hard IMO.
I can't wait! I have decided to buy my next C6 in 08 and not 07 due to roof thing not being fixed and engine rumors. Imagine! Anyone buying a BASE '08 with 425hp will have a faster car than any stock C6 Z51 built in 05, 06, or 07!
Chew on that one Z51ophiles. Then you will all be driving the next best thing to a base '08 C6. Oh , the humanity. Grief counseling should be immediately sought in such a situation. I want a 425 hp badge from the factory just to make the point. 425 will trump 400 even with the tiny difference in manual gears. I love it. You may want to peel off your stick on badges.
The 3V sounds good and hopefully the engine will be flexfuel or even E85. This will make the car much more forward directed. Displacement on demand would be good too. Engine advances like these will slam the resale value and desireability of 05,06. and 07 hard IMO.
Can someone clue me in here ?
DG
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Race Director
Joined: May 2001
Posts: 15,324
Likes: 2,080
From: Guelph, Ontario
Originally Posted by DSOM Z51
And what of the Cross fire fuel injected '84 Vette? Didn't this engine also show up in Firebirds and Camaros before it showed up in the '84 Vette? How long did they continue with it????
Melting Slicks
Joined: Jul 2004
Posts: 3,316
Likes: 1
From: San Antonio Texas - Any sufficiently advanced technology is indistinguishable from magic
Originally Posted by Mocoso
So only a year back I was reading how the LS2 engine was going to be rolled out across multiple vehicles to absorb the rather large development cost associated with the LS2 engine development and now only after a 3 yr run its being totally dropped? no wonder GM is in such financial hell... I guess the big question is: WHY does the vette need an ALL NEW engine platform midyear through its production run - its got a 400 and 500 hp variant, decent fuel economy, no reliability issues with the engine.... somethine we arent being told about the engine??? only thing I can think of is it costs too much to produce and they want to plop a cheaper engine in there....
Melting Slicks
Joined: Nov 2004
Posts: 3,064
Likes: 6
From: Pinellas Park Florida
Originally Posted by jazzlove
Good point. Why are they dumping a great engine after only 3 years?
Le Mans Master
Joined: Mar 2006
Posts: 5,323
Likes: 2
From: Northern NJ
I say bring back the HT4100 Caddy engine. Aluminum block steel heads. Lovely combination of disparate metals. First the valves went which required a complete valve job. Then the retorquing of the heads would cause a low end knock. The knock was the main bearing going bad due to the flex of the aluminum block during the torquing of the heads. After the mains bearings were replaced, eventually the crank would start to knock.
Great engine design!!!
Great engine design!!!
Pro
Joined: Dec 2004
Posts: 530
Likes: 2
From: Colorado Springs CO
Originally Posted by Delta3-2
Correct me if I'm wrong here....but, isn't Z51 a suspension upgrade ? Why all the references to Z51 "horsepower" ? As far as I know a C6 with the Z51 option has a more performance oriented SUSPENSION, not more horsepower.
Can someone clue me in here ?
DG
Can someone clue me in here ?
DG
Gear Base C6(MM6) Ratio (:1) Z51 (M12) Ratio (:1)
FIRST 2.66 --------------------------- 2.97
SECOND 1.78 ------------------------- 2.07
THIRD 1.30 --------------------------- 1.43
FOURTH 1.00 ------------------------- 1.00
FIFTH 0.74 --------------------------- .71
SIXTH 0.50 --------------------------- 0.57
REVERSE 2.90 ------------------------ 3.28
That feature, however, is not nearly as important a factor as its handling characteristics, IMHO. But to each his own...HTH
Safety Car
Joined: Jan 2006
Posts: 4,598
Likes: 78
From: Miami FL
2020 C6 of the Year Finalist - Unmodified
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16,'17,'18-'19-'20-'21-'22
Originally Posted by longboy4
......Thanks Shopdog, Your well laid out, unpretencious explanations of technical highlights gives the Forum a class quality. If ever there is an award given to Forum members..............
I second the motion. Shopdog - better start writing your acceptance speech. 
Team Owner
Joined: Aug 2003
Posts: 38,314
Likes: 35
Originally Posted by fenderowner
There are no HP differences. However, in the Z51 MN6, the gearing is different ("shorter," or numerically larger) from the base C6 in all gears except 5th; thus, it is a "quicker" vehicle when comparing 0-60 and quarter mile times. Outside of the Z06 (due to its higher HP and torque, since it has the same gearing as the stock C6), it is the quickest Corvette you can purchase (if that is your aim). Here's the comparison:
Gear Base C6(MM6) Ratio (:1) Z51 (M12) Ratio (:1)
FIRST 2.66 --------------------------- 2.97
SECOND 1.78 ------------------------- 2.07
THIRD 1.30 --------------------------- 1.43
FOURTH 1.00 ------------------------- 1.00
FIFTH 0.74 --------------------------- .71
SIXTH 0.50 --------------------------- 0.57
REVERSE 2.90 ------------------------ 3.28
That feature, however, is not nearly as important a factor as its handling characteristics, IMHO. But to each his own...HTH
Gear Base C6(MM6) Ratio (:1) Z51 (M12) Ratio (:1)
FIRST 2.66 --------------------------- 2.97
SECOND 1.78 ------------------------- 2.07
THIRD 1.30 --------------------------- 1.43
FOURTH 1.00 ------------------------- 1.00
FIFTH 0.74 --------------------------- .71
SIXTH 0.50 --------------------------- 0.57
REVERSE 2.90 ------------------------ 3.28
That feature, however, is not nearly as important a factor as its handling characteristics, IMHO. But to each his own...HTH
Burning Brakes
Joined: Nov 2004
Posts: 771
Likes: 0
From: Erie County, Pennsylvania
Originally Posted by fenderowner
There are no HP differences. However, in the Z51 MN6, the gearing is different ("shorter," or numerically larger) from the base C6 in all gears except 5th; thus, it is a "quicker" vehicle when comparing 0-60 and quarter mile times. Outside of the Z06 (due to its higher HP and torque, since it has the same gearing as the stock C6), it is the quickest Corvette you can purchase (if that is your aim). Here's the comparison:
Gear Base C6(MM6) Ratio (:1) Z51 (M12) Ratio (:1)
FIRST 2.66 --------------------------- 2.97
SECOND 1.78 ------------------------- 2.07
THIRD 1.30 --------------------------- 1.43
FOURTH 1.00 ------------------------- 1.00
FIFTH 0.74 --------------------------- .71
SIXTH 0.50 --------------------------- 0.57
REVERSE 2.90 ------------------------ 3.28
That feature, however, is not nearly as important a factor as its handling characteristics, IMHO. But to each his own...HTH
Gear Base C6(MM6) Ratio (:1) Z51 (M12) Ratio (:1)
FIRST 2.66 --------------------------- 2.97
SECOND 1.78 ------------------------- 2.07
THIRD 1.30 --------------------------- 1.43
FOURTH 1.00 ------------------------- 1.00
FIFTH 0.74 --------------------------- .71
SIXTH 0.50 --------------------------- 0.57
REVERSE 2.90 ------------------------ 3.28
That feature, however, is not nearly as important a factor as its handling characteristics, IMHO. But to each his own...HTH
DG
Racer
Joined: Nov 2005
Posts: 492
Likes: 0
From: Gilbert AZ
Originally Posted by jaysmith
I heard a rumor that a psychological counseling package will be available with the 08 base for buyers who are obsessed with other people's cars.
Oregon c6 talk to your doctor see about some valium and chill on the whole z51 vs everything else.
Safety Car
Joined: Sep 2000
Posts: 3,572
Likes: 420
From: Taildragers rule! USA1
Originally Posted by Delta3-2
Correct me if I'm wrong here....but, isn't Z51 a suspension upgrade ? Why all the references to Z51 "horsepower" ? As far as I know a C6 with the Z51 option has a more performance oriented SUSPENSION, not more horsepower.
Can someone clue me in here ?
DG
Can someone clue me in here ?
DG
Bring back the gold chains for the privileged in their Z51 badged cars.