I ran a best of 13.327 with just free mods and tires. Now i added the kooks 1 7/8 longtubes and true duels. Sounds awsome love it.

 

I'd rather take a chance hitting a random chick guessing my odds if she has HIV then take a guess at your improvements from adding headers/exhaust...

If I HAD to take a guess i'd say a few 1/10s.

 

Considering it's true duals, if you had a LID to go with it, probably a flat 13, maybe even dip into a 12.9 ... LS1's respond very nicely to breathers...

 

i would love to hit that 12.9.

 

On my one good launch, I ran an 8.33 out of a manual with similar mods. That's a 13.0-12.8.

And I did it on Skreet tires.

 

Im going to say 13.00s on street tires.

 

Well it's not far fetched at all. I know there are a few bone stock LS1's that were able to run flat 13's no mods, albeit most of them were M6's with good drivers. Most LS1's with full boltons and good tires / suspension setup can easily see mid 12's... ...go into internal motor, heads cam then they can get into mid to high 11's... anything beyond that is going to be expensive though...

OH P.S. I just realised you had a 98 (I saw it but it didn't click till now)... It would be a serious worthy investment to replace your intake with an LS6 Intake and delete the EGR... That, a lid,SSRA, true duals, and a tune should easily get you into the 12's with a good launch...

 

Yep i would definitely invest in an LS6 intake next, it will make a huge difference.

 

EGR is deleted with the kooks 1 7/8 race headers took care of that. Next mod is a fully built tranny with stall and yes looking into ls6 intake. My buddy is returning his car back to stock and selling it so i am getting good deal on tranny and stall. Got the headers for 500 from him. He just got them about a month ago and got about maybe 25 miles on them.

 

With the intake you will DEF be in the 12s.

 

unfortantly didnt get my 12 got a 13.04. I got there late and only got a total of three pass one i had to brake due to a car that decided to drive in my lane. Also had to hot lap every pass due to getting there realy late. But i believe she has a 12 in her with the setup. Tobad we wont get that slip till next season. I will have a intake and stall by then so hopefully mid 12s atleast.