pianoprodigy

So last night I went to the track and could do NOTHING due to a slipping clutch. The slipping got extremely bad, and I definitely need a new clutch. I'm running an ACT Street/Strip Clutch. It has at least 10k miles on it, but I'm not 100% sure it was new when I bought the car.

Right now, I'm making 410 whp at 16 psi. 95% of my driving is on the street at 13 psi which is about 360 whp. Soon, I'll be cranking up the boost to around 20 psi and hope to make around 500 whp.

With that said, I want my car to remain somewhat streetable. Soon, I'll be able to start driving the FC as a daily driver, but I don't want my car to be a garage queen. I've driven a puck clutch before (6 puck, unsprung) on a Turbo Eclipse. It wasn't exactly fun to drive. The pedal was VERY stiff, and the grab was quite sudden.

I don't want to buy another Street/Strip clutch if it's going to **** on me when I start to run higher boost. It seems like a 6 puck, sprung clutch is the way to go.

What do you guys think? I read about twin-plate clutches, and they seem to be very expensive. I'm not against spending the money if that's what I need.

Thanks for the input!

AL

racer1

Twin plates are the way to go if you have the money.

particleeffect

well, i have the ACT extreem. it's rated for 450tq... it's pretty slippable but the stiffness gets tiring in heavy traffic.

Scrub

iTrader: (25)

Are you sure it isn't rated for 450 ft.lbs of torque?

particleeffect

you're right i had a brain error there.

Scrub

iTrader: (25)

Thats also what I have...the ACT street strip clutch with extreme pressure plate which should hold up to 450ft/lbs of torque, which should be more then enough for 500 hp....since we all know Rx-7s aren't torque monsters.

Wargasm

Yup I'll chime in and say the same thing... ACT street/strip + extreme PP is the way to go for street driving. I've got 415 rwhp and 350 rwtq and it holds fine on my car.

mad_7tist

is that a puck style? what is engagement like

3RotorRocket

the ACT 6 Puck Clutch is a bitch driving around town in traffic

WHIPSrx7

Well, I have the Spec 4 puck clutch and i am hoping to be pushing close to 500whp after my car gets tuned. Definitley is the most streetable race clutch i would say.

Craig

pianoprodigy

Thanks for the input everyone.

I didn't know the difference between the Street/Strip and the Extreme setups until now. Apparently, the disks are the same but the pressure plates are different. It seems that the Extreme holds about 50 more torque than the regular Street/Strip (Heavy Duty) pressure plate.

Now, with the Extreme pressure plate as compared to the Heavy Duty (Street/Strip) pressure plate, the pedal will just feel stiffer, correct? I think that would be the difference. Other than that, the engagement should be similar.

Keep the responses coming...

Scrub

iTrader: (25)

Exactly right, It's not really all that stiff......the only difference you will notice is your left leg will be ripped and your right one will be scrawny.

pianoprodigy

What are you saying? Just because my name is pianoprodigy doesn't mean I have scrawny legs!

Any more input guys? Is there a 6 puck SPRUNG clutch available for the FD?

rynberg

Pineapple Racing offers a sprung 6-puck clutch, I know there are others but I can't remember them at the moment.

EDIT: Mazdatrix also sells one.

BMike

I just picked up the pineapple 6 puck sprung/ACT extreme setup from RX7store, it's not installed yet but it should be up to the task without being quite as abusive...

Howard Coleman

iTrader: (6)

i spent much of my spare time for a month looking into our clutch options...

for anyone running around 400 rwhp it is a pretty simple deal. an ACT HD pressure plate will hold 400 rwhp running the stock organinc disc. lots of nice transition before lockup (think traffic) etc. if you need a bit more you can run the ACT XT, a somewhat more juice up spring pressure. the ACT HD is very reasonable on the leg... the XT is noticeably harder to push.

from about 450 rwhp up things get lots more dicey. based on a conversation w the ACT tech guy i was going to buy the ACT XT and run the organic disc. the tech guy said the torque #s are the amount the clutch will lock up on engagement... i thought that would work. fortunately i had a discussion w my engine builder, Judge Ito, and he said no way would the XT w an organic disc hold my motor. he told me that he had finished a medium streetported setup for one of his customers w the XT and organic disc and the motor slipped the disc at 15 psi.

the reason i go through all this is that i am leading you somewhere... Daikin is a billion dollar a year japanese company that makes oem clutch and drivetrain packages for Mazda, Toyupes

Howard Coleman

iTrader: (6)

sorry hit the send button....

toyota, GM etc etc. they have a racing division named Exedy. Exedy is known for their twin disc clutches however the make a clutch, the Exedy Hyper Single, for the fd that is really slick. i spoke w the head tech guy at Exedy and he said the twin setup is too harsh as to engagement but the single disc is much better. it holds 600 ft pounds of torque. the pressure plate is forged aluminum!. this allows them to use more leverage to offset the higher spring pressure because the forged pressure plate cover doesn't deflect. also better cooling
as the sides of the pressure plate are open and there are air vanes on the back side of the pressure plate.
the disc is there own patented cerametallic w lots of springs. it comes w a chromemoly 11 pound flywheel and the pressure plate is 3 pounds lighter than the usual stuff everyone runs.
this baby is a jewel and can be bought (including flywheel of course) for under $1k.

one qualification... while i have it, it will be about a week before i drive it, so there's a bit of speculation on my part. i did converse w someone on the forum (Fish) in the U K who runs it and he said that the clutch pressure was similar to oem.

when i get my rig running i will post my impressions.

howard coleman

Nameless

Mind letting me know where you got it for under $1k? I've been looking at the Exedy hyper single as a possible option for my clutch needs.

Howard Coleman

iTrader: (6)

do a search for: MorePower Racing... everett wa 877 438 3939.... talk to Neil Ghuman and tell him you want the same price as Howard Coleman.

the problem may be availability in the country.. they had 3 and i bought one and another person who i talk w bought one. BTW, the disc weighs the same as oem which is unusual for a solid disc, making it not draggy as to shift speed.

howard coleman

MR_Rick

iTrader: (7)

Same here. I had the Spec 4 puck sprung hub and loved it. It was very easy to use and streetable. When I got it, I got it from the RX-7 Store and Jason told me is the same one he has on his. If this is true then it will serve your needs.

Nameless

Mr. Coleman: Thank you!