tried doing a search...but no luck.

how much can the stock clutch handle?
350whp?

me --> evo 8
boosting 23psi
evo 9 turbo
turbo back exhaust
LICP
intake
fuel pump...

I auto cross, and want to do some C.A.R.T racing soon...

don't drive daily on 23psi... usually around 18.5psi...daily

 

Stock is a single disc, approximately 2200lb pressure plate, 240mm disc. Let's do the math together:

NxRxFxP = Clutch torque capacity
N is number of surfaces. In this case 2
R is the radius of gyration in feet (average radius of friction material). 240mm is about .33 ft.
F is coefficient of friction (dynamic, not static). .25 is what we use for most organic materials in our calculations, but it actual varies depending on condition making it impossible to be real accurate.
P is pounds of clamping force (2200lbs).

Based on this information here the result is:
2 x .33 x .25 x 2200 = 363 ftlbs

This assumes peak clamp load. Clamp load varies with disc wear.
Torque capacity is rated at the flywheel. Torque capacity measured at the wheels will be significantly less (due to driveline loss, etc).
Torque capacity when clutch is slipping. A clutch usually has a higher break away torque capacity (abilty to get clutch to start slipping).

 

Thank you sir!

 

nice info ACTman i use ur clutches also A+

 

I dyno'd 320ft-lbs on a Dyno Dynamics with stock clutch... by my calculations, that's over 400ft-lbs at the flywheel.

I've got ~14,000 on the stock clutch, with two trips to the drag strip and maybe a dozen launches on it, two of which were really bad burn ups