Howdy,
Ran my 89 IROC with 98 ls1 / t56 in it at the track recently. stock ls1, using a restricitve tpi cold air intake (haven't gotten around to messing with it yet). Best 13.30 @ 106.xx with a 2.0 60' (245 street tires). It has been a daily driver, has about 5600 miles on the swap, several drag strip days, auto-x, and drift event. No issues, been happy with it.

 

list your WHOLE slip...
im really intrested in your 1/8th numbers, 330 (if you have it), and 60.

since the swap, ive only been to the local 1/8ths, but back when it was stock, thru a stock 99z28 muffler, she ran consistant 8.2s on street tires... and 8.0s on DRs.

 

13.3? you should be running way faster then that man. i ran a 12.8 at 109 in the quarter

.089
1.964
5.496
8.353
87.19
10.811
12.882
109.55

this run was with nitto's 555r

 

hes on relatively small rubber, street rubber, driver ability, and jsut about 100 other variables..

good times, get a tenth or two of you r60 and youll be in the 12s

 

I'm have a 3.42 rear, and i'm using a restrictive intake. I'm using the stock tpi snorkle intake (dynoed at 300 rwhp / 313 trq with the tpi intake, without the tpi intake it dynoed 317 rwhp / 326 trq). I was planning on making another intake, but haven't bothered with it. 7k miles on the street, been very happy with it

 

Awesome!!! I am want to find a nice shell and do a swap myself.


The MPH is impressive with the restrictive intake. My old TPI 350 Formula ran a 13.52@100. Interesting how my TPI would EAT LS1's to 60-70mph. After that, that would walk past me like I was standing still.

LS1 is easily the best production motor even made.

 

What mods did you have done to the TPI car? That's a pretty good-time.

Around here, stock LS1 4th Gens run high 13s (13.6s-13.9s). A little slower than the average, but were are at around 2000" elevation. I'm thinking that with the Hawks LTs, a cat-back, and a high flowing CAI my swap should be a low 13 maybe high 12s (once I get used to the T56). Does this seem acheivable?

 

Ummm...Best production GM motor ever, until the LS6, LS2, and LS7 were produced.