David Q

My heads/cam C5 went 11.40's with a 2.56 gear on the NA tune (430 rwhp). I swapped the gear for a 3.42 and then had the motor retuned (pulled 8* of peak timing for the spray). On motor is still ran 11.40's after the rear swap and timing pulled (411 rwhp). My problem now is, traction has become a major issue.

thumpinc5

How much cam and head work? I stayed kinda smallish on the cam. It's a COMP XER281. 232-234 @ .050" / .595"-.598" with a 112 LSA. Heads flow 305/220 @ .600". Bottom end is a stock crank, Probe forged 11:1s, Eagle 6.125" rods, King bearings, Mahle moly rings. Cometic .051" gaskets, COMP double roller, SLP oil pump, Scorpion 1.7s, 42# Racetronix, LS6 intake, 4L60E, and 3200 stall. Hell, I'd like to see and 11.7 on motor.

Frank

dennis50nj

I went 10.16 been 1.34 60 ft and 132 mph 4l65 a4 c6 373 gear 3800 yank hoosier 275 40 17 finished in third gear 7180 rpm about 488 rwhp NA 3260lbs

jpee

Hell.. you should see mid to low 11's just on motor!!! I have an 05 (A4) with a 2800 FTI converter, Kooks Headers, Ported intake, & a Tune by "Cartek" and I've run 11.59 in killer air (-800') in "normal air" I should run 11.7x with no problim...I have never had the heads off and the rest is stock (3.15 rear)

thumpinc5

Holy ****! That's moving.

Frank

dennis50nj

thanks Frank, if i spray it i will need taller tires or 342 gears maybe to stay in third

LS1LT1

You probably mean 2.73 gears I assume?
C5 automatics came from the factory with either 2.73s or optional 3.15s.

LS1LT1

Very cool, I'd figured you had to know him. We used to hang out at the tracks all of the time back in 2001-2004, he was like the lone LT1 guy among a sea of LS1 people, he was always a good guy.

93 ragtop

Quote:

Originally Posted by LS1LT1

I think you'll be surprised at just where those 3.15s can get you with that kind of power/torque.
I would try it.

I went 10.7/10.8s at over 127+mph with only 2.56 gears and under 400rwhp, but that was with a 6L80 (A6 with that steep 1st gear) in my bolt ons only C6 LS2.

That is very impressive to say the least.

David Q

Our setups are real close. Cam specs are the same, my heads might flow a little more. I have the stage 2.5 5.3 heads from Texas Speed. I am also running the racetronix 225 lph and LS6 intake. I have the stock rockers and a stock length pushrod. I have 1 3/4 longtubes and 3" all of the way out back. This year I am running a HKE built forged 347 with scat rods and a wiseco 3.905 piston. It now runs 10.50's at 130 on a 150 shot and 10.20's at 137 spinning bad on a 250 shot. You don't need a big motor to go fast. You just need a combo that works well and a good stall. I had a Circle D 4C+ with the first setup and a 2C now.

cv67

4.11s