Hey Richo,
I got the 2000lb/ft one as its not flywheel torque. I beleive you multiply by the gearbox drive ratio to see what torque is actually applied to the shaft. 1st gear, drag launch could be quite high!!! ?
any closet neards want to expand? lol
Kith Kowie's case was " I had to give them the torque my engine puts out plus the final drive and all the os giken gear ratios.
I think it worked out at about 2800 lbs so we are well under 4000 lbs" (His manufacturer is rated to 4000lbs)