Im supposed to be getting my 1680 inj. this week i'm then going to be doing a large single very shortly after. I am expecting 550+hp t the track. I have a act s/s but it is starting to slip a little (i really liked the way it felt when i first got it) I need to know from you guys making 500+ what clutch you went with or if you would recommend redoing the s/s. Note: I drive this car EVERY day so I need something that is somewhat streetable, i can deal with something difficult but my friend has a 4 puck on his 800hp Supra and it is almost ******* impossible to drive.

 

drivability is all ur oppinoin... id go for perhaps the exedy triple puck... its supposed to be nice... i havent used it.. or go for the step up in the act line up... if u want the power.. u have to make the sacrifice...

 

I have the ACT 6-puck with HD pressure plate. It is really not so bad, and once you get used to it, you can drive it very smoothly. Everyone else who has driven my car tells me it's a bitch to drive, but I kind of like that 'cause it keeps them from asking me drive it all the time Just don't get caught in rush hour. I remember when I had to take the car for emissions, the inspector stalled the car at least like 10 times trying to back it out of the parking space and drive it up on the emissions dyno.

I believe clutch's are rated for their torque capacity, not horsepower. The ACT 6-puck kit is rated at 514 lb.-ft. engine torque.

 

drivability with 4/6 pucks can be painfull
have you thought about a EXEDY dual or triple plate?

 

514 lbs of torque is more than enuf for ur car at 550 whp

 

has anyone tried the RPS carbon carbon's?
They offer a single and dual setup.
According to the supra guys, the dual one is the best of both worlds. Relatively easy on the street, easy to slip and holds huge amounts of power. As well, the fact that its completely rebuildable for around $400 whenever it does go (they claim it lasts MUCH longer than conventional clutches)

 

astro i have an RPS in my car now.... it works so far.

 

there really is no free lunch as to balancing clamping pressure and pedal pressure with a single disc clutch.. you need lots of pedal pressure to hold 500 hp... it will not be fun in stop and go. notice i said single disc. double disc is the way to go. racers found this out long ago. a double disc greatly increases the friction area so it will hold 2x at the same approx/oem pedal pressure. win win. in addition, most double discs are able to concentrate a bit more mass to the center of the flywheel thus decreasing inertial force. they also have beautiful pedal feel. i believe Exedy, HKS and Tilton offer double dics... there is a triple also.
howard coleman

 

ACT Extreme PP with a 6 puck disc is streetable, and will hold 400ftlbs easily. Tons of Supra guys run single discs on the street at much higher torque numbers (500-750ftlbs)than most of us will ever see in a seven. The key to these singles is learning to drive them. There is no free lunch, but an extreme plate with a bronze disc, can be slipped a little, and will hold far more than 500ft lbs. Probably half the street driven 700hp+(~600+ftlb) Supras run an ACT, or RPS plate with a broze disc. The Supra is a pull type clutch, I do not know if that makes a difference.
Regards, Carl Byck

 

where is a good place to go on the internet wjen looking to buy a clutch?

 

What brand? Carl

 

Give me a couple of different sites so i can compare and choose if you can

 

What about the mazdaspeed twin plate clutch?? Isnt that supposed to have lots of horsepower capability, yet have only moderately higher pedal effort than stock? I thought the point of twin plates was to have 2 streetable discs hence 2x friction, but only a marginal increase in pressure so easy on the legs. I believe its $1500 with flywheel from Corksport.....

Graham

 

I could never go back to a single plate clutch.

Pedal is a little heavier, but for the increased realiability and strength, its worth it

 

Pedal is heavier on a twin plate? You lost me. Everyone go buy a carbon Tilton twin plate, and never replace your clutch again (only 4500.00). Carl

 

mmmmm sounds good. lemme jus take a trip to the money tree in my backyard

 

You can put 950+ to the wheel's with the RPS carbon carbon clutch.

Peter Blach's supra did at the houston meet. but thats for a supra

But my friend has the ACT stage 2 plate with the organic street disk on his 93 R1, can hold up to 600 hp, i drove it and its very easey to work with.

 

Sorry, I meant the pedal is slightly heavier than stock...

 

I use the ACT stage 3 unsprung 6 puck with HD pressure plate. I am pretty go with it and dont regret buying it. It chatters on rare occasions but most of the time I can stop and go around town without too much difficulty. I had the ACT Street/Strip prior to this and I did the clutch upgrade when I put my single turbo on. I put down over 400+ hp at the wheels. 365 ft pounds of torque. Holds it no prob

 

There's a limit to a single disc clutch. Once you start making some serious power it just won't hold. Get a twin disc and you will never go back to a single disc setup.

 

Enzo you are right, the limit on an Arizona clutch is around 750ftlbs of torque (that would be a single bronze disc w/an RPS, or ACT Extreme pressure plate). Are you making that sort of power???

 

Everything is rated to something

Just because it works on one thing, means **** all on something else!

The last single plate I had, I killed in a month.

The same clutch/flywheel combo is in a mates RX3 that makes the same sort of power as mine and he has had it for ages. He shifts alot harder than I do and thrashes his car at every opportunity. Go figure

 

All true, once again, the driver makes all the difference. That said most Supras dump it at 6000 rpm so they're in the power when they hook. Point is single, double, triple all have plus's, and minus's. If you can afford it nothing beats a good multi plate, that said, I would use the smoothest disc available on a multi plate. A multi plate with pucked discs other than carbon can be BRUTAL (exedy,etc). There are single plates that will handle the power, but they take practice to drive. From a cost stand point a strong single plate will set you back 500.00-800.00, a multi disc will be three to ten times that. For my money I'll take the single, and learn to drive it. In the end, to each his own. Carl Byck

 

I have seen singles fail at much less hp that your mentioning carl. In a street car on the street i guess you can say that they should hold up fine. On the track in a car that is going 1.2 60ft times. It doesn't work so well.

 

Thinking of buying HKS Tilton twin disk, does anyone have it or know good/bad things, your guys feedback is great