My best was 12.1@119 on 315 street tires. This was with my shiny new th400 with a trans brake that I couldnt even look at without spinning the tires and a 3600ish stall. Mods are in sig. I had to take it very easy in first and could get a best of 2.03 60'. The tires just let go at more than 1/2 throttle in first. I could usually launch very easy and keep a little traction untill about 80' in. I shifted at 5300 in first and 5800 in 2nd and 6400 into 3rd. I think I can trap about 124 or so if I could get some traction in first and be able to shift a little higher. I guess I will find out when I get some better tires. Oh yeah it was about 98deg and 80% humidity. BTW I did not have a run where I didnt spin the tires for about 100' in first and second.

 

those really are some good times IMO, what psi are u at and are u on stock block........

 

Sounds like fun!

 

Sounds pretty damn good man, you're wasting that hard earned power spinnin the tires, get some stickies and run it! I think you should be able to hit 124 mph in the 1/4. Nice times man.

 

that is pretty good


what size turbo and how much boost


I have a PTS kit as well with a 6 speed and a t-67 precision
at ~ 7 to 9 psi it has ran a 11.70 at 118 and a 11.98 at 120
that was on nittos and the 11.98 was on the stock clutch,tranny,rear,2.0 60ft
I dynoed 475 at 4900 with ~ 8 PSI which seems kind of low to me
on that dyno run it peakde at 9 psi at 3400 and boost started falling off to less than 7 psi at 5500 or so
I have a been fighting this boost drop from day one

the 11.7 was on nine inch, spec stage 3+, built t56
my turbosmart e-boost II showed 10.0 psi at the end of the run but it
has been falling off about 2 to 3 psi on the street from peak boost of around 8 or 9 PSI

I am working on a 2 Bar set up right now

 

I am running about 7psi on a t70. Stock shortblock and heads right now aswell. 410ci, big turbo and a dana 60 on the way soon hopefully.

 

have you had it dynoed
do you have boost falling off or is it holding steady


I have a stock engine other than LS6 valve springs

it seems like no mater what boost level that I run,
when i make a 3rd or 4th gear pull from ~3000 to ~6000 it loses 2 to 3 pounds of boost
and I have tried to hold it with the boost controller but no luck with that yet

 

As far as i know I am holding boost fine. Wastegate issue maybe?

 

You're right. It sounds like a WG issue or a pipe issue... Maybe a silicone coupler holds tight but pops a small leak under high boost and then the boost falls?