F1 Stage 2 Clutch - Miata Turbo Forum - Boost cars, acquire cats.

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Old 03-12-2013, 09:04 AM   #1
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Default F1 Stage 2 Clutch

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.
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Old 03-12-2013, 09:48 AM   #2
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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/
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Old 03-12-2013, 10:18 AM   #3
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You buy cheap **** on ebay, don't be surprised when sometimes it turns out to be cheap ****.

Now buy a real clutch.
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Old 03-12-2013, 11:02 AM   #4
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i bought it when i was na and hoped it would hold, as some have found it would. 1.8 clutch and flywheel are a direct replacement are they?
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Old 03-12-2013, 07:58 PM   #5
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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.
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Old 03-12-2013, 09:22 PM   #6
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I had an F1 racing carbon clutch in my Honda civic - it sucked. It made horrible smells if you even thought about slipping it, and was pretty weak after only 1000 miles. I wouldn't ever buy one again.
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Old 03-13-2013, 05:58 AM   #7
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Quote:
Originally Posted by Animus21 View Post
Buy the FM1 or the 949 racing supermiata clutch.
Do i need to swap my flywheel for a 1.8? Will iit make a hug difference to Acceleration?

Last edited by rhysmate; 03-13-2013 at 06:09 AM.
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Old 03-13-2013, 09:52 AM   #8
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I'd assume getting the FM1 you would get the happy meal. And with the 949 clutch. It only comes with a flywheel, unless you're getting their girly version.
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Old 03-13-2013, 09:58 AM   #9
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Yes, the current FM1 (or 2) clutch requires a 1.8L flywheel. You could contact them and ask if there is anything for your 1.6L flywheel.
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Old 03-13-2013, 11:06 AM   #10
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949 Racing makes a 1.6L clutch or a 1.6L ACT XTSD would be fine.

I still prefer the 1.8L flywheel and clutch. Then I'd recommend the same but throw the FMI or FMII into the mix.
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Old 03-13-2013, 07:59 PM   #11
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I'd just be worried about the extra weight of the 1.8 flywheel. but if you guys say it's good i'll give it a go..
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Old 03-13-2013, 08:09 PM   #12
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Quote:
Originally Posted by rhysmate View Post
I'd just be worried about the extra weight of the 1.8 flywheel. but if you guys say it's good i'll give it a go..
What exactly are you worried about? Go with a stock 1.8 flywheel and the FM1 clutch and be done with it.
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Old 03-13-2013, 08:14 PM   #13
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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)
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Old 03-13-2013, 08:55 PM   #14
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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.
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Old 03-13-2013, 09:26 PM   #15
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Quote:
Originally Posted by Animus21 View Post
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.
I put an OEM MSM disc and PP in my 94 before I sold it. Buyer installed a turbo and it juuuuuuuust started to slip at 200hp. This was an older BEGi kit with a genuine Garrett GT2554R. There are better options than OEM MSM parts, just sayin'

Quote:
Originally Posted by rhysmate View Post
Do i need to swap my flywheel for a 1.8? Will iit make a hug difference to Acceleration?
"hug difference?" Doubtful. Whats the actual weight difference between the 1.8 and 1.6 OEM flywheels? If you are super worried about it, you should also be able to find a 1.8 Exedy lightweight 11-12lb steel flywheel (Exedy PN ZF505) in your neck of the woods. F1 also makes a flywheel for the Miata, but I've heard mixed reviews.

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?
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Old 03-13-2013, 09:56 PM   #16
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Quote:
Originally Posted by rhysmate View Post
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)
If you can find an ACT HDSS clutch for cheaper in Ireland go for it. I only recommend the FM1 over the ACT because it is slightly cheaper and holds more torque.
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Old 03-13-2013, 09:58 PM   #17
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Default F1 stage 1 2 3 clutches

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

Exedy cover
Attached Thumbnails
F1 Stage 2 Clutch-exedy_kmz03.jpg   F1 Stage 2 Clutch-exedy_mzc610.jpg  
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Old 03-13-2013, 10:02 PM   #18
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Another thing about the f1 is that the travel is identical to stock but is slightly stiffer which is nice.

My stock '99 clutch with 120k+ on it, held up pretty well at 9-10psi, but I don't think it would have very much longer.
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Old 03-13-2013, 10:03 PM   #19
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Quote:
Originally Posted by flounder View Post
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.
This isn't good or acceptable, FYI. My ACT would hook all 200+ft.lbs from the first go.
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Old 03-13-2013, 10:19 PM   #20
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I hear ya sav.

Living with it until I find the motivation to yank it all out again.

FWIW, I would guess that I'm around 250whp or so.
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