My car is an '87 auto with stock 2.59's. Right now im running rather consistent 13.86's with 1.9x short times and my mods are flowmaster catback, k&n, deleted AIR/EGR, and TB bypass.

Im thinkin about seeing what kind of N/A best i can get without touching the stock L98.

Thoughts are: Long Tubes, Single High Flow Cat, Drag Radials, 3000 Stall Torque Converter, Shift Kit, and 3.73's.

Anybody run this type of setup? Im thinkin it should be good for mid to low 13's with 1.7x short times?

 

A set of long tubes and a free flowing exhaust drag radials are another good idea. A higher stall converter I don't know about a 3000 rpm stall on a stock L98 though, it might be a bit much. A high stall converter will soften the shifts so a shift kit is a good idea too. A set of 3.73's for a stock L98 are too much gear I would think.

 

I agree with everything but the gear you picked...73's are too much for an L98...I have an LT-1 with the set up you describe...long tubes, no cats or pre cats, 3:73's, 3200 stall converter, transgo full race shift kit and a 52MM TB which is useless but was on the car when I got it...

I also run a Dana 44 and big DR's out back...my short times average in 1.78 to 1.84 in the winter with low DA and 1.85 to 1.96 in the summer with high DA...

My ET's range from 13.18 to 13.40 in the winter cold and from 13.70 to 13.95 in the summer heat...

 

what gear would you guys recommend? 3.07? 3.45?

 

3.07 seems to work well on the L98 unless you make big changes to boost rpm. Higher stall, shift kit, tires, exhaust, 1.6 rr's, UD pulleys (in that order).

 

i plan to swap out the tpi for a converted lt1. so 3.73 should work for the time being and should do rather decent in the future? I still havent quite gotten the hang of these cars yet, mustangs are so much simpler! lol

 

With the future intake swap, 3:73's would be nice.

 

3.07s are a proven performer in an L98. 3.73s will certainly slow you down in the quarter.

 

I once had the same thought as you. However I decided to spend a pile of money and build a 383. In saying that, I have a set of March pulleys that have been sitting in my garage now for 2 years. I am going to install those, and head down to the track before the 383 install, and see what she will do with full exhaust and pulleys. I am really hoping a can dip down into the 13.4x range with nice clean air, and a 60 foot in the 1.90 range.

 

You can get the car into the low 13's high 12's without the converter, gears or shift kit with an untouched motor. Forum member _twisted_ got his 86 into the high 12's with the stock motor, trans, rear and into the 11.70's with a little N2O.

 

i just sent him a pm!

thanks!

 

I replied to your PM, forgot to add that my car had 3.07's in the D36 - 2.59's are costing you your 60' time.

 

thanks man, im picking up a set of MT drag radials tomorrow, and im gonna order a set of hedman elites next week along with a high flow cat.
then work on gears

 

I've been as fast as 13.3 with the stock L98. Headers, catback, gears, ET streets, and McLeod clutch are my mods.

I went against the grain and went with 4.10 gears for my L98. I have a 6 speed, and I actually end up shifting into 5th gear in the quarter mile. While everyone on here will tell you that I had to get slower by going to a 4.10 gear, I picked up about .2 and about 1 MPH, even with the extra shift. With some more seat time (my 13.3 is with a 1.8 short time) and a bit better day, I think it's got a 12 second slip ET in it. With some more minor mods (under drive pulley, 1.6 roller rockers) I think it'll go in the 12's pretty easy. I've been as fast as 12.4, but that's with a 100 HP shot of N20. Again though, with some more minor mods, and improving my driving, I am pretty sure it's got an 11 second ET in it on the 100 shot, and probably an 11.6 or so on the 150 shot.

The gears make it a fun car to drive around town. The low gear, and low RPM grunt of the L98 make it fun as heck to drive in traffic. Even on the freeway, 75 MPH is still only about 2200. If you are looking for maximum ET, I doubt the 4.10 gear is the way to go. However, if you are looking for maximum fun on the street, a steeper gear is hard to beat.

With the addition of the LT1 intake (it's been in my garage waiting for install for what seems like forever) I think I'll have a 12 second car on motor, and a deep 11 car on the 150 shot. Assuming I don't break a piston or anything, lol.

 

thanks for the info!

 

But don't forget, he has an auto

 

Got the mickeys mounted this afternoon! I cant wait to try em out!!

...and yes the shop ****ed up and mounted them backwards...

 

I wish you all the luck in the world....but...please remember that the stickier the tire the more at risk your Dana 36 diff is...one good hook and kaboom...I turned the spider gears in my 36 into chicklets with one good hook and that was on street tires...

I am not trying to rain on your parade but the Dana 36 is well known for not holding up to a good hook...it is not a matter of if but when you will break it..just the way it is, sorry...

 

oh i know! When she lets go i'll have a D44 put in...just hope its one of the times i trailer it to the track and not drive it!! lol

 

I just noticed your in Norfolk, what track do you run at? VMP? Next time you are going out let me know and I'll swing up there.