Sleeperls

What gears and combo are you running. Mine will be s475 with th400. The rear i purchased has a cracked spider gear and chipped the very edge of the ring gear. They where 373's and i was going to use them to get by.

Ill be running a 27 inch hoosier qtp.

mrstepheneades

Im going th400 as well. I built my 9" with a 3.18 gear because I wanted the top end for the 1/4. 28" tall tire and that gear with a tight converter should put me around 165mph. More mph if I wanna rev to 7000 and beyond.

Sleeperls

I forgot to add my car will be a slow 600ish rwhp turd. Ill be happy if it runs high 9's low 10's

dezlfrek

iTrader: (1)

my car, 3400lbs, 3600(9.5 ptc) stall leaving on the 2 step at 3500, #'s say 625 to 640rwhp, ran 9.54@141.6 with a 1.47 60'..
3.25 gears and 28" tire(mt 275 pro) crosses the line around 5500 rpm

RonSSNova

iTrader: (3)

I have th400 and 3.73 gears, 30" radials.
@144 mph I'm at 6800
The converter slip plays a role as well.

No clue where I'm at power wise.

3.73 prob fine for you. I'm planning on 3.42 or 3.31 down the road.

Ron

98Camarod

iTrader: (43)

I ran 3.25's which worked out decent for the street as well.

shawnc16

28" tires with a 3.50 gear

Forcefed86

iTrader: (4)

For a good guess...

Put the power you think you'll be making and weight in a 1/4 mile calculator.

http://www.wallaceracing.com/et-hp-mph.php

Then select the closest gear to get you there with a little wiggle room. Don't forget to figure 4-7% or so for converter slippage.

http://www.f-body.org/gears/

LASTLS1

iTrader: (7)

3.50 never changed

MUSTANGBRKR02

iTrader: (91)

You are still running the 3.5?

a98ws6

iTrader: (48)

I have 4.11's but they will be changed out. That was for a nitrous setup. Also i will be running 1/8 mile so im sure that will change things?

lsx1

I have 3.25's and a 28" tall radial, they work great for street driving and still have managed to cut 1.24 60's at 3800lbs.