Th400 people what rear gears are you using?
#1
Th400 people what rear gears are you using?
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.
Ill be running a 27 inch hoosier qtp.
#2
TECH Fanatic
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.
#4
TECH Apprentice
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Join Date: Oct 2013
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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
3.25 gears and 28" tire(mt 275 pro) crosses the line around 5500 rpm
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#8
8 Second Club
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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/
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/