I went from an ACT Prolite Flywheel/6puck sprung/HD Pressure plate to a OS-Giken Twin Disc and I can't tell the difference in "reviness". I am sure the OS Giken has more total mas but it is concentrated towards the center compared to the ACT setup. Inertia wise....I think they are pretty close....I would say its at least like my old setup but with the Streetlite flywheel instead of the Prolite.

Chris

 

has anyone ever maxed out a ACT 6 puck unsprung?

i know my old fd put down a little over 600 whp without any problems........ but has anyone maxed it out?

 

Lets hear more.....

 

I bought a OS-giken metal twin plate. Iam going to be drifting so i cant really skimp on a clutch. GL.

 

I'm running the HKS GD PRO Twin Disc on my car, the thing grips like a son of a bitch but only downside is that it's noisy and sounds like a bag of marbles when engaged lol. This is on a 344 rwhp / 294 lb torque @ 14 PSI (7000 rpm) street car application by the way.

 

I am b/w the act 6 puck sprung and unsprung. I like the smoother engagement and low noise of the sprung.the
Diff b/w the two is 514 vs 577 lb/tq. How much whp is 514lb/tq in an rx7? What about 577?

 

Im almost sure its flywheel rated, NOT wheel.

 

Either way. How much whp is 514 or 577 lb/tq?

 

i bought the act 4 puck solid (unsprung). I know that it has some chattering, but i mostly drive my car on the weekends and track. Plus i plan to have a lot of 8000rpm launches.

 

worst case scenario i replaced the disc with a 6puck sprung disc since the pressure plates are the same

 

Thats pretty hard to gauge, but Ernie T roughly makes 900fwhp and 700fwtq. So, I think you're looking at around 700/750 fly wheel horse power.

 

I should update. Since the last time i posted I cut a 1.47 60' and have another handful of 10 second passes on this ACT 6-puck.

 

attn bullshitter, no he's not

 

Attn Dick:

That's what it says in his sig.

GT42R
PFSupercars built and tuned Full Bridgeport
781 rwhp Q-116
589lbs of torque -All turbo-
9.95@138mph
1.41 60'

781whp is roughly 900 fly wheel horsepower.

589wtq is roughly 700 flywheel torque.

P.S. I can deadlift more then you IRL.

 

I have. just did it this weekend at the track.. At around 620rwhp and it started to slip top of 3rd and completely let go in 4th gear. this was a new clutch with about 800 miles but i guess you can say very abused miles. Act extreme PP with a unsprung 6 puck.

 

My friend maxed out an Act 6puck unsprung. He was pushing 612whp at the time. Now he Has a 4 puck disc, which he claims holds better. This was the clutch that i installed. I am in the process of breaking in the clutch although ACT says that a race disc like this one only needs a few hard slips and you are good to go.

The box said that this clutch is not for street use, but i don't feel it that uncomfortable nor particularly hard. AIming for 525whp. Hope it holds fine with a bunch of 8000rpms launches.

 

I think 500 is the limit for the ACT 6 puck race disc. I remember last year when I raced dj and his Ls1 rx7 the clutch was brand new and I only had 501rwhp at the time.. after 3 burnouts and then the race the clutch slipped really bad in 3rd and 4th. You can hear it in the video. I think you can get away with one pass or so but back to back abuse will make it slip. This past weekend I made one run with 497hp and it was fine, the next run i turned it up to 620 and it couldnt hold the power. So anything over 500 will kill an ACT pretty quick and eventually start to slip.

 

I think it's safe to say that goes for pretty much any single disk. They can only go so far, even more so under track abuse.

 

I just began to drive my rx7 with 4 puck solid clutch on stop and go traffic and it is really annoying. I can live with the harsh pedal feel but it is very grabby. There is no slippin, so it si difficult to get off the line in stop and go traffic. Other than that the clucth is holding up fine.

 

6 pucks suck to drive on the street. I use an Exedy Twin Carbon now

 

Running a Triple OS Giken Clutch now upgraded from the twin plate, its tranferring more of the power to the wheels now as the twin plate couldnt hold the power when I was upping the boost it was slipping at around the 130mph terminals runs

 

A twin plate couldn't hold the torque from a 470 hp rotary? That seems odd to me. I was planning on getting the OS Gilken at some point because my 6 puck slips on hard shifts from 3rd to 4th. I was hoping the twin plate would hold over 400 ft/lbs

 

my cusco twin plate with ~15,0000kms on it started failing around the 370rwkw mark. slipped when boost came on. bear in mind this is with a BIG 'laggy' turbo so power comes on all at once.

HKS GD max twinplate now, no problems whatsoever - apart from removing the gearbox! What used to be a 1 hour job in and out, is now a 5hr one! (having to remove clutchcover thru the inspection holes and disassemble the locking rings to separate)

 

i went with the os giken twin dissc. as stated above but i got one for a reasonable price. the thing is that when you get these clutches the replacement for the disc is the same amount as when you would replace a act clutch so in reality you come out cheaper. Not to mention that it is driveable on the street & it last 10x longer (as in years)

 

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