Calling all LS2 Experts
Safety Car
Joined: Sep 2006
Posts: 3,922
Likes: 4
From: Cheektowaga NY
St. Jude Donor '08
Just checked mine and its 243 and its an 2006 that was built in May of 2006. I had my car dynoed with Kooks 1 3/4 headers,cats,160 t-stat,Rt.66,and a tune ,and i had 356.7 hp and 352.4 ftlbs. My car is an A6 auto tho. Good luck to you
Last edited by Tony B4; Mar 21, 2007 at 10:44 PM.
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Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
Safety Car
Joined: Sep 2006
Posts: 3,922
Likes: 4
From: Cheektowaga NY
St. Jude Donor '08
WOW, this is NUTS
. I can`t beleive that they would make this kind of error on this kind of car,i mean, i know people make mistakes but COME-ON
, this is there flagship car,not a colbalt. 
. I can`t beleive that they would make this kind of error on this kind of car,i mean, i know people make mistakes but COME-ON , this is there flagship car,not a colbalt.
Le Mans Master
Joined: Dec 2005
Posts: 7,753
Likes: 210
From: North Western Connecticut
There is no way this was some mistake by GM... no way! They will simply say they reserve the right to change any part at any time! You aren't going to find where specfic head configuration is called for so my guess folks with 799's are simply out of luck..... Maybe it was a part supply problem or GM wanted to use up over stock of the 799 heads. My guess is you won't get GM to even comment on this situation.....
Race Director
Joined: Feb 2006
Posts: 11,733
Likes: 15
From: SC
There is no way this was some mistake by GM... no way! They will simply say they reserve the right to change any part at any time! You aren't going to find where specfic head configuration is called for so my guess folks with 799's are simply out of luck..... Maybe it was a part supply problem or GM wanted to use up over stock of the 799 heads. My guess is you won't get GM to even comment on this situation.....
Race Director
Joined: Feb 2006
Posts: 11,733
Likes: 15
From: SC
What sucks is if modding gets you less returns because these 799 heads don't flow as well. So far we have one car that as dyno'd low for it's mods, we'll have to see what other cars have 799 heads and what numbers they are putting down.
Drifting
Joined: Jul 2005
Posts: 1,533
Likes: 0
From: az
don't jump the gun yet until we know for sure.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Very interesting, earlier this week I dyno tuned a C6 with Kooks, and a Corsa cat back. I was expecting to see something in the neighborhood of high 360s to low 370s on my Mustang dyno. I have got as much as 375 with a header only C6 on many occasions but not on this particular car. This was an 05 C6 M6 car and no matter what I did I could not get there. Maybe this head issue could be a problem, I will certainly have my customer check his casting numbers.