Problems with clutch after upgrade
 

Well.. My clutch is in great condition, my car was mainly highway miles, driving from NC to CA most of its life. I upgraded to just a few little mods in signature and now at around 80 MPH in 5th under boost my clutch is slipping. I was running bout 12 to 12.5 PSI when it slips. I set the boost to 10 or 11 and now its fine under full boost. How much HP can the stock clutch handle? Ricks estimated that I am running 300 to the wheels at 12 PSI.

It's toast.
 

Your stock clutch will not be able to handle that power.
Several years back when I first purchased my 93, I put a new OEM unit in there. A couple of months later, I added an intake, catback, down pipe and ECU. The clutch immediately started slipping under boost(12psi).
I eventually had to upgrade to the ACT unit and have added more mod's since then and have had no problems.

It will last a long time if you nurse it....but who wants to nurse it? ;)

Good luck
GEB!

Re: Problems with clutch after upgrade
 

That's strange... I have a similar setup as yours and don't experience that at all. So I don't think it's that the stock clutch can't take the power.

Re: Re: Problems with clutch after upgrade
 

Did you ever Dyno or run the 1/4? we should have similar #'s, mine was never dynoed.

BTW...

I left out a small detail,not sure if its relevant, I have 143,000 on my OEM clutch.

Re: Re: Re: Problems with clutch after upgrade
 

Nope, I don't drag or dyno my car... I do have the occassional street race, but that's it...

Also, my car has 73k miles on it, so that's probably the difference.

I think the high mileage on your clutch has something to do with it....


BTW, the OEM clutch disk itself, can handle a good amount of power. It's the OEM pressure plate that will not hold up and will eventually begin to slip under high boost. With anything over 280 RWHP, it's only a matter of time before you start seeing the OEM pressure plate begin to slip.

it sounds like your clutch. i'm running 280rwhp on a relatively new stock clutch and it handles the power fine. 143k miles on an rx-7 is a helluva lot.

At 10PSI its just fine, even 11 its just fine. when I get to 12 or 12.5 then it slips.

My engine is new BTW, the clutch is original.