Working on 12.9?
Thread Starter
Instructor
Joined: May 2001
Posts: 123
Likes: 0
From: Hampstead,MD,US
Working on 12.9?
Hey guys, haven't been to the track yet, but I'll give you the lowdown on what I've done so far.
Stock Exhaust manifolds, new fr-y no pre-cats, 3" single cat, new rear-y with crossover and flowmasters
24lb/hr injectors
TB bypass
Cut lid
Thoughts on where I should be and how to get to a 12.9? Mild Cam + Intake?
Stock Exhaust manifolds, new fr-y no pre-cats, 3" single cat, new rear-y with crossover and flowmasters
24lb/hr injectors
TB bypass
Cut lid
Thoughts on where I should be and how to get to a 12.9? Mild Cam + Intake?
Race Director
Joined: Mar 1999
Posts: 12,597
Likes: 237
From: Bartlett Illinois
Re: Working on 12.9? (89VetteWIP)
I think you may need to improve the intake with runners and a base. I also don't thinkk you could get a 12.9 with the stock 89 cam..
I ran a best of 12.82 but my car was running way to rich and I have not been back since I tuned it.
Good luck
I ran a best of 12.82 but my car was running way to rich and I have not been back since I tuned it.
Good luck
Safety Car
Joined: Jun 2000
Posts: 4,870
Likes: 25
From: Long Island, NY
Re: Working on 12.9? (steve40th)
I am assuming you have a 89, so do not get the 3.73 gears and save your money.
3.73 are great for LT1's.
First you need to base line your car, should be around 14.0 at 98mph. Next I would do an aftermarket base & runner combo. Plus you need to do all the little/free mods such as cutlid,TB bypass, port the MAF sensor, k&N filter, and pullies.
Then a nice set of Drag radials would help big time. Take a look at my signature, I have cut about .5 seconds off my ET with these mods in great weather.
Vic
3.73 are great for LT1's.
First you need to base line your car, should be around 14.0 at 98mph. Next I would do an aftermarket base & runner combo. Plus you need to do all the little/free mods such as cutlid,TB bypass, port the MAF sensor, k&N filter, and pullies.
Then a nice set of Drag radials would help big time. Take a look at my signature, I have cut about .5 seconds off my ET with these mods in great weather.
Vic
Pro
Joined: May 1999
Posts: 634
Likes: 0
From: milford,Ma. USA
Re: Working on 12.9? (89VetteWIP)
I agree with Vic... 
you would be way overgeared with 3.73.. 3.07 gears will give the best performance with a long runnered motor. You will need need head work, a cam, and improved intake to see 12's
:yesnod:
you would be way overgeared with 3.73.. 3.07 gears will give the best performance with a long runnered motor. You will need need head work, a cam, and improved intake to see 12's:yesnod:
