Clutch issue?

stew_7mgte

New Member
Jun 12, 2011
73
0
0
Fontana, CA
In 1st through 3rd gear i can go WOT with 14 psi boost no problems. 4th and 5th though my clutch slips before i even hit 10 psi. Doesnt make sense to me as first gear should produce a lot more torque then any other gear. Am i missing something?
 

Dan_Gyoba

Turbo Swapper
Aug 9, 2007
1,836
0
0
Alberta
www.gyoba.com
First gear produces more torque at the wheels, yes, but this actually means LESS torque at the flywheel. The engine has to produce LESS torque in order to accelerate the flywheel, since the lower gears give the engine a greater mechanical advantage over the driveshaft.

In higher gears, the wheels gain a greater mechanical advantage over the flywheel, which means more torque through the union at the clutch.

Want proof? while your transmission is out as you do the clutch, put it in first and try to spin the input shaft with your hands. Then try it again in 4th. Which requires a stronger grip?
 

stew_7mgte

New Member
Jun 12, 2011
73
0
0
Fontana, CA
I see your point. Still weird that i can break the tires loose in first when boost hits but can barely boost at all in fourth. I would think the clutch would slip somewhat. Whats stock clutch setup good for power wise?
 

wardog

R.G.V WARDOG
Jan 19, 2006
564
0
16
ALTON, TX
If you gonna be running around 400 rwtq , my suggestion to you is

Stock TOyota Oem Pressure plate $75
Ebay 6 puck $75 or if it makes you feel better Act 6 puck $150
Toyota Throw out bearing and pilot bearing

I have used this in more than 10 cars making 400 + horsepower and always has hold the power, at least to 430rwtq. I used the ebay 6 puck ceramic and i held very well, i figure the act should be better. Well good luck with the clutch issue and don't forget to resurface the flywheel. Please take it to somebody that knows how to cut the toyotal flywheel.