updated dyno results
Thread Starter
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
updated dyno results
Well, after finally dealing with our rubbing wheel issue (which required a $1400 set of LG drag spindles and a $100 lower ball joint ... long, terrible story) we finally got to the dyno today. I think it has rained 3 times this summer in Texas, and not for weeks and weeks. The chance of rain today was 10-20% and it POURED all the way there and while we tuned. Anyway ... before we went:
Vararam
Yank SS4000
3.90
tune
326/337
This summer we added:
ARH 1 & 7/8" headers with a 3" off-road X-pipe (no cats)
Bullet Pure Stock Eliminator cam (OEM lift and duration)
UD pulley
upgraded springs
372/376
Dyno link:
http://s1248.photobucket.com/user/sa...3dyno.mp4.html
Vararam
Yank SS4000
3.90
tune
326/337
This summer we added:
ARH 1 & 7/8" headers with a 3" off-road X-pipe (no cats)
Bullet Pure Stock Eliminator cam (OEM lift and duration)
UD pulley
upgraded springs
372/376
Dyno link:
http://s1248.photobucket.com/user/sa...3dyno.mp4.html
Thread Starter
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
Here is the cam card. In IHRA Stock Eliminator (Pure Stock) we have to keep stock lift and stock duration as well as OEM pressure on the valve springs both open and closed.
Le Mans Master
Joined: Aug 2007
Posts: 6,475
Likes: 297
From: Orange Park FL
Thread Starter
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
Oh, there is no way we'll hit all the events they offer. I am a HS math teacher/varsity softball coach and am off all summer so that makes it easier to race. My wife is an elementary principal and they work M-TH in the summer so that is nice too. We have a divisional race in Dallas which is only an hour away so that's a close one. Other than that we'll try next year to hit a few national and/or divisional events in either San Antonio or Oklahoma. On top of those we go to Super Chevy in Ennis in May and bracket race in Dallas when the mood hits us. In good air we hope to be in the 11.50 range now.
Thread Starter
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
Regarding the rules all they say is that the OEM lift, duration and open and closed spring pressure must be the same. I had to get documentation from a gentleman at GM by the name of Mark Kent to let IHRA know what the stock cam numbers were.
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What about a Z06 cam? Would you have had to have a Z?
Like a Z with an auto conversion?
Regardless, nice gains and best of success with your racing.
Like a Z with an auto conversion?
Regardless, nice gains and best of success with your racing.
Thread Starter
Burning Brakes
Joined: Feb 2012
Posts: 1,047
Likes: 43
From: Longview Texas
Thanks guys. My wife and I have been working very hard this summer making changes in order to be competitive in our class. Everything that was done on the car was done by us in our 2-car garage. Many, many hours have been spent and we're happy with where we are and how the car should perform.
No Z06 cam allowed. NHRA/IHRA has a classification for each specific vehicle. The coupe is a natural B car and the Z06 is in a quicker class. It's all based on factory horsepower and shipping weight. Each car then must run cams, heads, intakes, etc. that were available from the factory on that particular car.
Regarding running the cam from a 2000 coupe since it has better numbers ... yes you can. However, you have to claim your car as 2000 which then means no LS6 intake. It's all a chess game and the racers that have been running Stock for years and years have forgotten more about to play it successfully than I'll most likely ever know. The whole system is actually pretty complicated and technical and you just have to be around it for a long time to figure out which combination is good and how to make it go fast.
No Z06 cam allowed. NHRA/IHRA has a classification for each specific vehicle. The coupe is a natural B car and the Z06 is in a quicker class. It's all based on factory horsepower and shipping weight. Each car then must run cams, heads, intakes, etc. that were available from the factory on that particular car.
Regarding running the cam from a 2000 coupe since it has better numbers ... yes you can. However, you have to claim your car as 2000 which then means no LS6 intake. It's all a chess game and the racers that have been running Stock for years and years have forgotten more about to play it successfully than I'll most likely ever know. The whole system is actually pretty complicated and technical and you just have to be around it for a long time to figure out which combination is good and how to make it go fast.