mx5cartalk.com

I am after definitive clutch/flywheel recommendations for a n/a NB, with the works. Estimate 110rwkw, but torque less than a turbo.

I am leaning towards a NA1.6 clutch and flywheel package. I dont want a \"puc\" , button or ceramic clutch. Just a heavy duty organic clutch with normal to slightly heavier feel than stock, with a \"matching\" flywheel in the vicinity of 9lbs.

Id like recommendations on brand, source, and cost please, particularly from those who have done the same modification.

toda flywheel

4.5kgs for 1.8
3.5kgs for 1.6

http://todaracingusa.com/category?secti ... d=12&id=51

Dam the NA one is lighter...

Can I install the smaller lighter 1.6 clutch and flywheel onto a stock 1.8 NB8B?
Or will it slip because its too small?

Or do I compensate this with more clamping force?

wun911 wrote:Can I install the smaller lighter 1.6 clutch and flywheel onto a stock 1.8 NB8B?

Yes

wun911 wrote:Or will it slip because its too small?

Or do I compensate this with more clamping force?

The racing boys who run the 1.6 flywheel run the 1.6 clutch assembly with uprated clamping force.

Cheers,
Danny

Wun,

The clutch that went into the Fatty mobile is a 1.6. If it can cope with his turbo engine I think you will be fine for your car. Have a chat with James about where he got his from, then talk to FFG about installing it ....

http://todaracingusa.com/category?secti ... d=28&id=58

why not just get the kit - seems pretty reasonable price wize and i would say it would handle quite a bit of power.

Exedy sports clutch should handle 110 OK and still be good as a daily driver. Also ask yourself if yoiu really need a lightweight flywheel. It's easy just to shave the lip off the standard flywheel. This places it midway between stock and $400 alloy ones.

yeah the stocky 1.6 flywheel with a bit of a shave still should be pretty good i reckon. and a damn lot cheaper.

the exedy sport i have is handling 160wkw fine

Ohhh I like the toda they even tell you the inertia, looks like they removed the most weight from around the edge where it counts

Anyone know the weight and inertia rating of fidanza 1.6 and 1.8 flywheels for comparasion?

How is the exedy sport? Would your recomend it for a daily driver? Is it a pain in traffic and for parking? Or did you 'learn' to live with it?

Hey FFG when my car comes back.......

In the coming months I will be ordering a 1.6 Fidanza Flywheel for my Clubman, they are not only lighter than the Toda but also alot cheaper (JDM Tax ). As for clutch im going to run something with a bit more clamping force, due to the smaller 1.6 flywheel. Ill go either a Stage 1 HD Exedy 1.6 clutch, or a 1.6 ACT Heavy Duty Modified Clutch kit.

I have also read on Miata.net that a few people run standard Exedy 1.6 clutches with lightweight 1.6 flywheel, on the 1.8 with no slipping problems. Im sure this would be fine if you car was mostly standard, and you were not looking at running bigger power in the near future.

Here is some Flywheel information for you..

FIDANZA

90-93 MX5 1.6 Fidanza 7.3 lbs = 3.31122 kg

94-05 Mx5 1.8 Fidanza 7.9 lbs = 3.58337 kg

VS

TODA

90-93 MX5 1.6 Toda 7.7lbs = 3.49266 kg

94-05 Mx5 1.8 Toda 9.9lbs = 4.49056 kg

VS

STANDARD

90-93 MX5 1.6 stock 17.5 lbs = 7.93786 kg

94-05 Mx5 1.8 stock 19.5 lbs = 8.84505 kg

Fidanza Flywheel



Toda

honestly the only difference from the stock clutch is that it does not slip. other then that it is no heavier or more difficult to use.

I am also looking at a clutch replacement.
But have a couple of clamping force questions.

The Exedy 1.6 HD has a clamping force of 616Kg as quoted by a local supplier which is deemed 40% strogner than standard.
That is with an organic disk (I am not entertaining puck or ceramics).

For comparison i rang another shop which has done some matchups for me in the past (nissan/datsun clutch combo and holden/toyota) he can modify a new OEM pressure plate but only about 40% stronger again.
Not an Exedy but a local PBR brand.

The latter shop knows my driving habits and expects it to be able to handle the turbo up to 10 maybe 12 psi.

Would the increase in clamping pressure be a direct correlation to power/torque increase?

its got more to do with the friction - if the friction co efficient is linear to pressure then yes if not then no. appart from that I can tell you no more. one of the members with a higher level of mathmatical eduction would probably be able to tell you (orx626)

Getting complicated...

So its a combination of clamping force, frictional materials and the surface area.

Are the combinations trial and error (we dont want to do this more than once) or is there a formula we use to predict how much power it can handle and how it will 'feel'?

So what are the 'stats' of the OEM clutch and what/where are the stats of the aftermarket ones?

sorry for the nube quesions...