Opinions twin disc clutches

**Halon** · 02-12-2013

I'm sure you already know, but act redesigned their PP's and discs awhile ago. Thus if you happen to be using mismatched disc and PP's, they will likely drag at lower rpms. Just throwing that out there in case you didnt already know.

As for twin discs, I never ran one because I heard the harmonics they create are hard on the transmission. Which so is clutch drag, so pick your poison I guess.

**Tachyon** · 02-12-2013

Quote:

Originally Posted by Halon

I'm sure you already know, but act redesigned their PP's and discs awhile ago. Thus if you happen to be using mismatched disc and PP's, they will likely drag at lower rpms. Just throwing that out there in case you didnt already know.

As for twin discs, I never ran one because I heard the harmonics they create are hard on the transmission. Which so is clutch drag, so pick your poison I guess.

Actually I did not know this. I have a PP that is probably pushing 8 years old, and use their new discs. Hmm.

Jack's transmissions seems to have a solution for the broken hub springs that the twins can cause. Being I am building a different gearbox for 2013, I might give 'em a try.

I don't mind replacing internal transmission parts, but I do get a bit flustered when you wind out 1st, but have to let your RPM settle to
about 5500 before it will go into 2nd. Hoping a twin would help with this.

Thanks for the information thus far everyone... I appreciate it.

JET, you have PM.

**Kracka** · 02-12-2013

Quote:

Originally Posted by Tachyon

Actually I did not know this. I have a PP that is probably pushing 8 years old, and use their new discs. Hmm.

Looks like you found the problem. ACT should have included a notice with the revised clutch discs to prevent issues like this from even occurring in the first place.

**goodhart** · 02-13-2013

Quote:

Originally Posted by Halon

I'm sure you already know, but act redesigned their PP's and discs awhile ago. Thus if you happen to be using mismatched disc and PP's, they will likely drag at lower rpms. Just throwing that out there in case you didnt already know.

Do you happen to have a link on this? or know when it changed?