Help me upgrade clutches in my REPU, rotary GLC and FB

Jeff20B · 03-02-2008, 04:53 PM

So rather than keep beating a dead horse, I'll come right out and ask the question:

Can a 20B get away with a 215mm clutch disc?

Short answer NO unless you increase the pressure plate in some way, such as with the street strip one I described above. But this is only a maybe.

I just love the way it drives though in Percent's FB. It's light, responsive, has plenty of grip. It would allow the 225mm street strip pressure plate to be used in the REPU where it honestly is needed more. Heck my friend's '77 REPU has a 7" SC with a Racing Beat light steel flywheel, HD disc and 225mm pressure plate and it tows very well and has done so since we swapped it in there several years ago. The only difference here is mine would use a stock disc since I don't like a super short friction point (the shorter pedal travel of the REPU makes the friction point shorter than an FB using identical components).

So if the 215mm street strip will work in the FB with the 20B, I'll go for it saving the 225mm stuff for the REPU.

Oh, and since the 20B needs a rebuild, I can definitely use the 215mm stuff during break in.

If it starts to slip I can always look for an aluminum Fidanza or something.

03-02-2008, 04:53 PM	#6
Jeff20B Rotary Fanatic Join Date: Mar 2008 Posts: 215 Rep Power: 18	So rather than keep beating a dead horse, I'll come right out and ask the question: Can a 20B get away with a 215mm clutch disc? Short answer NO unless you increase the pressure plate in some way, such as with the street strip one I described above. But this is only a maybe. I just love the way it drives though in Percent's FB. It's light, responsive, has plenty of grip. It would allow the 225mm street strip pressure plate to be used in the REPU where it honestly is needed more. Heck my friend's '77 REPU has a 7" SC with a Racing Beat light steel flywheel, HD disc and 225mm pressure plate and it tows very well and has done so since we swapped it in there several years ago. The only difference here is mine would use a stock disc since I don't like a super short friction point (the shorter pedal travel of the REPU makes the friction point shorter than an FB using identical components). So if the 215mm street strip will work in the FB with the 20B, I'll go for it saving the 225mm stuff for the REPU. Oh, and since the 20B needs a rebuild, I can definitely use the 215mm stuff during break in. If it starts to slip I can always look for an aluminum Fidanza or something.