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500whp Street car what clutch are you using?

Old 07-12-09, 11:22 AM
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500whp Street car what clutch are you using?

I bought a used cusco clutch in december and managed 351whp with my stock turbos every thing fine. I switch to single turbo and manged [email protected] and still looking to get into 490-500whp. I went to the track i and felt that it started to slip.

I used my car on the street every weekend and some times during the week. I need a clutch i can live with. I don't want to spend more than 600 bucks.

Options are

Spec Stage 3 (good for over 500ft/tq)
ACt 4 puck
Act 6 puck
Act 6 puck hub.

I see that the rx7 store uses the spec stage 3 on their 500whp cars. also it is the cheapest. Any inputs?
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Old 07-12-09, 11:29 AM
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Originally Posted by janrx7 View Post
I bought a used cusco clutch in december and managed 351whp with my stock turbos every thing fine. I switch to single turbo and manged [email protected] and still looking to get into 490-500whp. I went to the track i and felt that it started to slip.

I used my car on the street every weekend and some times during the week. I need a clutch i can live with. I don't want to spend more than 600 bucks.

Options are

Spec Stage 3 (good for over 500ft/tq)
ACt 4 puck
Act 6 puck
Act 6 puck hub.

I see that the rx7 store uses the spec stage 3 on their 500whp cars. also it is the cheapest. Any inputs?
I waited for a little and got a used OS Giken twin disk here on the forum with 3.9mm(out of 4.1mm new) thickness on the discs for 450.00. Pedal feel is only slightly harder than stock and it holds like crazy....its also surprisingly very smooth when engaging.....no harsh chatter...

It was worth it...sometimes really good used stuff is better than other new stuff.

Chris

p.s.they are also re-buildable so you will not have to purchase another clutch...
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Old 07-12-09, 11:59 AM
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HKS twin disc i burnt the single ceramic disc up in a year! Works good.
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Old 07-12-09, 02:30 PM
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I've ran Spec stage 3 before. Its irritating on the street but its doable.

People also run ACT Extreme PP with street disc for 500whp.
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Old 07-12-09, 03:05 PM
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Just get the Exedy/Cusco Twin Plate clutch and call it a day. Feels close to stock and will handle the power easily.
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Old 07-12-09, 03:23 PM
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Originally Posted by WaachBack View Post
I've ran Spec stage 3 before. Its irritating on the street but its doable.

People also run ACT Extreme PP with street disc for 500whp.

what do you mean by irritating? i don't want to spend over 1,000 bucks on a twin plate clutch.
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Old 07-12-09, 03:37 PM
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well I can almost guarantee that getting a twinplate will eventually be on your list if your car is making 500whp and more. What you are going to spend on changing clutches every year, you could just buy yourself a twinplate. I was in your shoes, and opted for a twin and never regretted it.
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Old 07-12-09, 04:36 PM
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Originally Posted by janrx7 View Post
what do you mean by irritating? i don't want to spend over 1,000 bucks on a twin plate clutch.

He is probably talking about the soft feel of the spec clutch, it literally feels like you're driving a stock honda. Get the twin plate exedy and call it a day.
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Old 07-12-09, 05:13 PM
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I've had the same ACT 6-puck in my car for 5 years with a whole stack of 10 sec time slips to go with it.
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Old 07-12-09, 05:25 PM
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^^ your a special case man. We're talking about normal cars here. lol
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Old 07-12-09, 06:21 PM
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OS Giken twin used on the forum. they aren't hard to find.

The clutch you actually want, at a price you can afford.
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Old 07-12-09, 06:29 PM
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I had a ACT with a street disc take 500hp. I drove it on the street with no problem but the pedal presure is pretty high. Never had it on a track so cant tell you how it holds there.
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Old 07-12-09, 07:25 PM
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Originally Posted by janrx7 View Post
what do you mean by irritating? i don't want to spend over 1,000 bucks on a twin plate clutch.

I mean that with a 6 puck disc, there is little to no slipping. It just bites. Takes a while to get used to it.
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Old 07-12-09, 09:23 PM
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Spec sucks...I've seen a spec stage 3 slip on a buddies FD and a spec stage 3 pretty much take a **** and slip like mad in less than 5k miles on a buddies KAT 240sx.
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Old 07-12-09, 09:39 PM
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Originally Posted by zinx View Post
I've had the same ACT 6-puck in my car for 5 years with a whole stack of 10 sec time slips to go with it.

Same here. Not a stack of 10 sec time slips as I dont go to the track very often but I have had the clutch for two years making 600whp and no problems.
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Old 07-12-09, 11:10 PM
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Originally Posted by zinx View Post
I've had the same ACT 6-puck in my car for 5 years with a whole stack of 10 sec time slips to go with it.
I like the act 6 puck. I did have to replace the disk after 1 year of abuse. 8k launches over and over. Had a spec 3+ and it didnt last on the dyno. I say F##K SPEC as they did nothing about my clutch and I even spoke with the owner before I bought it discussing what I would be making and what my plans were... My advice is get a act 6 puck (either sprung or not is fine) or pay $$ for a multi disk unit..
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Old 07-12-09, 11:50 PM
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Bully Stage 5. Very street drivable clutch.

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Old 07-13-09, 07:34 AM
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i see the act 6 puck clutch is wining, but what about pedal feel? I don't have kids yet and don't want to pull a groin with y clutch
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Old 07-13-09, 08:38 AM
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Originally Posted by janrx7 View Post
i see the act 6 puck clutch is wining, but what about pedal feel? I don't have kids yet and don't want to pull a groin with y clutch
man up
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Old 07-13-09, 09:01 AM
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Originally Posted by janrx7 View Post
i see the act 6 puck clutch is wining, but what about pedal feel? I don't have kids yet and don't want to pull a groin with y clutch
If you worry about the pedal feel and want lost of grip...I will have to insist on a OS Giken Twin disc from the forum. They come and go regularly and fluctuate between 400-500 bucks, most of them with at least 80% meat still. And they are rebuildable. You will not regret it. I love the fact that my clutch will take anything I throw at it and my GF can still drive the car. Mine uses solid discs and it is not even "chattery"....its has a very smooth engagement.

I could not be happier.

Chris

p.s.Also, my fork will not bend and my pivot ball will not break...or my groin for that matter....
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Old 07-13-09, 09:21 AM
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Tilton 7.25" twin sintered metallic disk. Cheap *** to rebuild, and will take anything.
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Old 07-13-09, 10:05 AM
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I think the ACT 6-puck is annoying to drive on the street, whenever it does finally wear out i will go with a twin disc setup, but i can't be disappointed in it. It takes everything i throw at it. 8100 launches off the revlimiter over and over again. All those 10 sec passes were 1.5x 60's. Really the only thing in my drivetrain that hasn't been replaced since i've owned the car is the clutch and driveshaft, everything else from the motor to the axles is new.
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Old 07-13-09, 01:23 PM
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What difference is there between the ACT 4 puck vs 6 puck?
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Old 07-13-09, 01:40 PM
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Originally Posted by janrx7 View Post
What difference is there between the ACT 4 puck vs 6 puck?
The 4 puck is harsher engaging...its supposed to have a slightly stronger hold.

I haven't been able to tell the difference in holding power between the two and I've had both before on several different cars. I probably didn't push them hard enough. The 4 puck did engage a little more aggressively.

Chris
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Old 07-13-09, 02:05 PM
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I've had an unsprung 4 puck, an unsprung 6 puck, and a sprung 6 puck. I would never go with an unsprung clutch again. They just don't last, and the chatter is really irritating. It's especially bad during parallel parking or pulling out of uphill driveways in reverse. The unsprung 6 puck is barely liveable but the 4 puck makes the car exhausting to drive over time. Don't expect more than 10k out of a puck clutch if you drive in traffic a lot.
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