Originally posted by NAPARM
Has anyone here considered putting a supra 5 speed in their falcon? And has anyone had any quotes or does anyone know roughly how much it would cost? And how much horsepower are they rated to?
I investigated this as an option to upgrade the gearbox in my EL XR6 rally car. The concensus was that the Supra five speeds are rated to about the same as T5. The twin turbo boxes / 6 speed boxes are a lot stronger, more expensive and harder to fit, and if you had sufficient HP to warrent something stronger than a T5, then the tremec (and not the tremec T5 fitted to many late V8 Falcons, which is a regular T5 with a tremec badge) is the go. It's easy to pick the difference, the tremec weighs about twice as much as a T5, and is a lot bigger.
A T5 will do the job in a standard or mildly worked Falcon, unless you are really hard on the box. The I6 and V8 boxes are different, and can't be swapped.
I hope I have solved the problem in the rally car by getting a close ratio straight cut gear set put into the standard box. The first three gears are all about 4-5mm wider, so hopefully they will hold together. It's not in the car yet - hopefully will be this weekend.
Whiteryder, can't you please pass on the details for SVO - thanks.