What do u guys think.. Need one to hold the power but not make driving the car enjoyable..

 

the ACT extreme pp and unsprung 6 puck is streetable but requires some finesse. especially with an alum flywheel. its kindof irritating in traffic and just hilarious watching someone else try to drive it. i get chatter on most low speed starts (causes stange looks from pedestrians). i have had it for 2 years or so and am going to try a street disk w/ the extreme pp. this should be more streetable and still handle the power.

by the way this setup takes tons of abuse. i have never in two years felt slip or fad after many repeated hard starts etc...

justin

 

yea but what kind of power are you making...

 

This has been covered a million times. Try searching.

It seems a lot of people like the Exedy Hyper Single or Twin.

 

I have ACT with9.5lbs flywheel. It was cool at 497.7whp.

 

os giken twin plate

 

Yea im really liking the OS giken twin plate.. but some people are saying they are not meant for the street or they wear out very quickly for street driving. only meant for race. Anyone have this problem. I dont want to spend 2,000 and then have to rebuild it ($600) every few months.. if its like that ill just keep buying a $500 ACT.

 

I ran a OS Giken twin plate in my Nissan GTI-R (4wd 2ltr turbo small hatchback) modded to around 400bhp. bought it second-hand, ran if for 9 months of track and strip, took it out (parting out car), still only half worn and sold it on..... quite good I reckon!

 

IMHO the EXEDY twin plate is a great streetable performance clutch. This is the only clutch i suggest as the pedal modulation is still like stock. if your looking for something a little cheaper than look at the Clutchmaster units. whatever you do dont get a ACT clutch they are well known to destroy forks and slave cylinders on the 3rd gens


good luck

 

YEA Im not hearing to many good things about ACT lately...

 

ACT has been fine for me, but if you want to be safe, a multi disc clutch is the way to go, especially if you want a close to stock pedal feel.

 

My exedy twin plate i am selling works great. I think that it drives nicer than a stock clutch.
Greg

 

I have a OS Giken laying around from my brothers FC so I just bought the adapter kit to covert from pull to push type.. So I guess Ill be using that...

Anyone know the part number from Mazda for the counter weight for the FD>.

 

Sooo... OS Giken good! But I'm dropping in an Exedy twin plate 'cos it's cheaper and works just as well!

 

Never Dynoed...ran a 13.0 @111MPH w/2.35 (shitty) 60ft. (93oct 15psi)

the car weighs 3000lbw/ driver and is neck to neck (~40MPH roll-on) with a dynoed 303WHP 2000lb car. (93oct 15psi)

i estimate around high 300's at the wheels


justin

 

????? Well known destruction?? Not to us. Let me know the details please since we haven't had reports of this and our design hasn't changed. Many (most) reputable RX7 shops swear by our parts with no complaints, so I find your post puzzling.

 

Yes, many RX-7 owners are having problems with breaking clutch fork pivot ***** and failing clutch master cylinders and slave cylinders soon after installing the ACT Xtreme pressure plate. Two days after installing my Xtreme PP my clutch fork pivot ball broke and I had to spend a couple hundred dollars more just to have the trans pulled again and have it fixed.

Its a great clutch, but this is something that MANY owners have experienced. Myself included.

 

Has no one stopped to think that ACT clutches are, by a large margin, the most commonly installed aftermarket clutch in an FD? And most of these are installed in higher mileage cars that are driven hard. It only stands to reason that more failures are going to be experienced when using an ACT clutch, as they are what's installed 95% of the time. If Centerforce was the dominant clutch (there's a reason they're not), I doubt the failure rate of these parts would be significantly different.

 

Its also getting to be comon knowledge amoung fc owners that if you want a act xtreme pressure plate then go with new hydralics on installation and on a pretty regular basis after that.

 

i love my spec

 

ACT is all I've ever used and I have never had any of the failures you guys spoke of. That included my Red 7 that ran 10's and my new CYM that will hopefully run low 10's , high 9's (if Im lucky)....

 

So what's wrong with Centerforce? That what I always ran and in fact was just talking about keeping in the car today. I'm going to switch back to the .45 housings and sacrafice a little HP on the top end for more fun zipping around the street and road courses. Anyway I'm curious to hear what the recent problems have been with the Centerforce dual friction clutches. Worked for down to corrected high 10's.

Kevin

 

I tried a Centerforce clutch in my FD but it did not hold up well in my car under drag race launches. Swapped in an ACT and had better luck under these conditions, but it would start to have issues after repeated passes. Both worked great as street clutches and I thought both were comparable to stock for pedal pressure and engagement.

 

What kind of 60' 's and MPH were you getting when you had problems with a Centerforce?

 

Back in the day (1980s-90s)my CF DF clutch would not hold 325hp/265tq. I have always used ACT, but have had many the problems mentioned above on both my RX7, and my '97 Supra. That said, an ACT HD PP with a metallic 6 puck is a very strong inexpensive combo. On Supras, the ACT HD has been used with various discs to hold over 800ftlbs of torque, and survive 50 plus 1.6 sec 60ft drag launches at that power level. Not many single disc set-ups can boast that. So, I think it is certainly true that Extreme PP puts more stress on all the associated parts than one of lesser pressure, but if you need that clamping force, they have it. FWIW the RPS PP on a Supra holds about 15% less torque all other things equal. One problem with the metallic discs is that they can fuse to light FW. The solution for serious drag racing is to use a slightly heavir FW to absorb the excess heat. Carl