Originally Posted by chip-3door
Originally Posted by Redkop
Agree with Dave and Alvyn.... I have about 370bhp on my Esc Cos and have had 2 rebuilds. The last one was after totally destroying the box.
Seems to be a bit of a lottery, Si B has similar power, trackdays his car at every opportunity and absolutely hammers up and down the box reguarly on the road, and hasnt had a failure at all yet.
I've driven an Escos on standard gearbox with 400+bhp and very agressive antilag and after 2 hours of trashing around the track sideways and kicking the clutch it was still there. It broke it once or twice but only whenracing from lights.
Depends very much how much mechanical sympathy you have during shifts and a bit on luck. AFAIK MT-75 usually fails due to flex of one of the shafts on 3rd gear bearing. It used to be big problem on grp.N rallycars, so 3rd gear wheel and bearing was rebuild after each rally, but in a road car it can last a while or nothing depending on your style.
I wonder if someone found a limit at which mere aplication of full throttle will brake the box?
Bythe way - it's not the power but torque thatbrakes the box so you can have quite a lot of power but further up the rev range and still get away with that.