F1 Stage 2 Clutch
#1
Junior Member
Thread Starter
iTrader: (1)
Join Date: Jan 2012
Location: Ireland
Posts: 469
Total Cats: 22
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Anybody have experience with these? I seem to be loosing grip with mine, but i cant decide whether its the clutch or the gearbox seal.
It seems to slips fairly randomly.
i'm only running 8 psi. so by rights it should be ok?
it holds for the first 4000 rpm then off it goes.
It seems to slips fairly randomly.
i'm only running 8 psi. so by rights it should be ok?
it holds for the first 4000 rpm then off it goes.
#2
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
If you are leaking oil onto the clutch, it will slip even off the line. At least my stock one did when the rear main was weeping. My first ACT clutch would start slipping at higher RPMs when I went from 6psi to 8psi. Upgraded to a stronger setup and havent had a problem since.
Also a simple search reveals others have had similar issues.
https://www.miataturbo.net/suspensio...h-issue-48728/
Also a simple search reveals others have had similar issues.
https://www.miataturbo.net/suspensio...h-issue-48728/
#5
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
To set the record for you and for everyone who will read this thread while searching
the stage 2 is known to slip with boost. stage 1 is stock replacement, and also known to slip with boost.
stage 3 f1 clutch will probably hold 12 psi, but isnt particularly fun on the street.
OEM msm clutch will hold about as much with superior driveability. That said,
Buy the FM1 or the 949 racing supermiata clutch.
the stage 2 is known to slip with boost. stage 1 is stock replacement, and also known to slip with boost.
stage 3 f1 clutch will probably hold 12 psi, but isnt particularly fun on the street.
OEM msm clutch will hold about as much with superior driveability. That said,
Buy the FM1 or the 949 racing supermiata clutch.
#13
Junior Member
Thread Starter
iTrader: (1)
Join Date: Jan 2012
Location: Ireland
Posts: 469
Total Cats: 22
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
A slower revving engine? OK I'll look into getting one. It might cost me a fortune to get it over here. It could be upwards of 500 dollars by the time I ship it and pay import tax, which might mean I look for an alternative like exedy or act to save some money. (With a 1.8 flywheel)
#14
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I have the f1 s2 on mine. It did like to let go above 4k during the first 1000 miles or so at 15psi. But lately, it's been fine. It seems to hold fine if I don't beat on it right off the bat. If I drive it around normally for 5-10 miles before getting "jiggy" with it, it holds the power just fine. On the other hand, if I pull out of my driveway after the car's been sitting overnight and try to redline 1st gear, it'll almost certainly slip.
If I could do it all over again though, I would probably go FM.
If I could do it all over again though, I would probably go FM.
![The Brain](https://www.miataturbo.net/images/smilies/the_brain.gif)
#15
Elite Member
iTrader: (37)
Join Date: Apr 2010
Location: Very NorCal
Posts: 10,448
Total Cats: 1,900
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
To set the record for you and for everyone who will read this thread while searching
the stage 2 is known to slip with boost. stage 1 is stock replacement, and also known to slip with boost.
stage 3 f1 clutch will probably hold 12 psi, but isnt particularly fun on the street.
OEM msm clutch will hold about as much with superior driveability. That said,
Buy the FM1 or the 949 racing supermiata clutch.
the stage 2 is known to slip with boost. stage 1 is stock replacement, and also known to slip with boost.
stage 3 f1 clutch will probably hold 12 psi, but isnt particularly fun on the street.
OEM msm clutch will hold about as much with superior driveability. That said,
Buy the FM1 or the 949 racing supermiata clutch.
I'm daily driving my FM1 clutch with a 9lb Racing Beat flywheel and loving the hell out of it. That's what, 5-6 votes for FM thus far?
![wink](https://www.miataturbo.net/images/smilies/wink.gif)
#16
mkturbo.com
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (24)
Join Date: May 2006
Location: Charleston SC
Posts: 15,189
Total Cats: 1,685
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
A slower revving engine? OK I'll look into getting one. It might cost me a fortune to get it over here. It could be upwards of 500 dollars by the time I ship it and pay import tax, which might mean I look for an alternative like exedy or act to save some money. (With a 1.8 flywheel)
#17
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
For the record,
The F1 stage 1,2,3 are the same pressure plate, which is Exedy's base OEM replacement $65 MZC610.
That pressure plate is from the $115 EXEDY KMZ03 OEM Replacement Clutch Kit
The disc is a Chinese made replica of the Exedy. That's it. No extra plate pressure, extra straps, heat treating, zip. Thus, folks with these clutches are slipping below 200whp. Exedy makes good quality stuff but this particular plate is their OEM replacement design. They do have higher capacity pressure plates but this one isn't it.
Exedy kit
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/70067-f1-stage-2-clutch-exedy_kmz03.jpg?dateline=1363222728)
Exedy cover
The F1 stage 1,2,3 are the same pressure plate, which is Exedy's base OEM replacement $65 MZC610.
That pressure plate is from the $115 EXEDY KMZ03 OEM Replacement Clutch Kit
The disc is a Chinese made replica of the Exedy. That's it. No extra plate pressure, extra straps, heat treating, zip. Thus, folks with these clutches are slipping below 200whp. Exedy makes good quality stuff but this particular plate is their OEM replacement design. They do have higher capacity pressure plates but this one isn't it.
Exedy kit
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/70067-f1-stage-2-clutch-exedy_kmz03.jpg?dateline=1363222728)
Exedy cover
![](https://www.miataturbo.net/attachments/diy-turbo-discussion-14/70068-f1-stage-2-clutch-exedy_mzc610.jpg?dateline=1363222728)
__________________