3500 stall & 28" slicks on LT1 good combo?

Well im trying to achieve a 12 second pass in Denver and am wondering how well a hot cammed lt1 with long tubes etc would perform with a 3500 stall paired with 28" slicks? I know a lot of ls1 guys are running similar combos with great succes and am wondering if i would benefit.

what rear gears?
more then likely you will go slower with the 28's to a "taller" rear gear ratio.
26" tires would be better,unless you have 4.10's or more

Right now its got 323 but that can change very easily. So if i upped the gear ratio to 4:10 would it be benneficial?

with a 28" tire the 4.10's would be more like 3.73's. it's a tough choice,but i still think a shorter tire would help you get the ET you want.

That is similiar to my combo: 3600 stall and 28" ET Streets. I went from 26 to 28 inch tires to slow me down last season because I was getting too deep into the 11's to be able to dial 12.00 for street class. MPH went up one, and ETs went up a tenth or two depending on the launch. My goal was to slow the car down and be real consistent for bracket racing.

This year I have opened up the exhaust so I will have more power and it may be a different story.

I was running some numbers in conjunction with the f-body.org gear calculator and NHRA's altitude adjustment numbers. With my 323 gears, 28" slicks, and 6000 redline i would be at the top of 2nd at the end of the quarter mile. Would this be good to pick up some et/mph or not worth the effort? However, if i were to go to a lower elevation track i would be shifting right before the traps.

2nd!!!!

I hit third just before the 1/8 mark and stay in it until the end of the 1/4...

The stall sounds cool. I ran a 3000 stall with 4.56 gears and 28" tall slicks and Redbird would mid 1.5X's on cool days.
Denver = NO AIR so you have to mechanically make up for it and gear ratio or tire height are two of the ways to try.

When you jump, my advice is jump TWO gear numbers higher. You won't hardly feel the difference with only a one number change. My biggest dissappointment was going from 3.23 to 3.73.
The car never responded as I hope to that change, way too mild
and we have AIR here in MICH.:D ;)

My combo goes back to a 4.10 gear and a 4200/2.77 TSR this year. Tires outta be comin' up more than 3-4 inches now! :death:

Could you send some of that Michigan air my way :D

So how would bad would 4.10 gears be on the highway? That would be my only concern with going to this setup. I do about a 45 minute highway drive to work everyday and i plan on taking the camaro on nice days.

Other than that i think hitting up some 4.10's and 28" slicks paired with a stall would be the way to go. Now if the 4.10's worked out with the 28" how much would stall come into play? Could i getaway with a lower 2800 or is a high stall gonna be a necessety?

Thanks for insight!

With a 4.10 and A4 she will be hummin'! You are looking at 2500+ at 65 or so with a 26" tall tire. BUT... Waddaya want?
A drag car or a street car? Drag car = 4.10 Street car = 3.73.

I used to run the 4.10 in my street days but with a tall 295-50-16 tire, to kill some of the RPM on the highway.

There are compromises to be made especially when you want a fast street car, even in a full on drag car! Youz make your choices based on the 5 W's. Sometimes you have to do things different a second time, THAT is a car thing! GOOD LUCK with your decision!:cool:

P.S. Something in the 3000 range works well on most LT1's.
Don't worry about matching a converter to a gear ratio.
If you put a 3000 stall in, it may stall at 2800 with a 4.10 gear or 3200 with a 3.73 gear. GENERALLY a lower NUMBERED gear will work the converter a little harder allowing it to stall a little higher. Seems funny but it true.:confused:

Also take weigh out if you can, -weight is LIKE free HP! That is a good thing!:D

That's going to be a tough choice to make. The way i look at it it might benefit me more to swap to a TH350 that i have and keep the lower gears. If im going to have to drive slow on the highway either way i go might want the benefits of the th350. What are you opinions on this? You info has been great too!

MY best advice is to put the 3000 converter in the 4L60E trans
FIRST and drive it with your current 3.23 gears and see what kind of a kick you get. ONE step at a time! A torque converter is one of the biggest improvers of automatic performance. Talk to a converter maker for your application. If you like, I can give you a number.

DO NOT put a TH 350 trans in it at this point. Only put the trans in when needed for strength. I EXPECT to run high 10's on my 4L60E and 7-5/8" rearend this year. For how long is the only question!! :D :) :cool:

HInk

You're going to be over-tired with a 28" slick! Not only will you kill gearing, but the tire swell on the top-end will be pretty brutal for your car. You need to be making some really big power to run a 28" slick in an A4. I'm pulling 1.4x 60' times on 26" ET Drags with 3.73's. A heads/cam M6 car could certainly benefit from 28" slicks, but 4.30:1+ gearing works best.

I'd go with a 26" tire and 3.73's. Hoosier makes a 26x9x15 that would work really well. A wider tire will just be added drag for you, and you'll hook just fine on the 9" tire. I pulled numerous 1.5x 60's on that tire!

Trevor