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Micke · Post by **Micke** » Fri Jun 22, 2007 5:55 am

I just got my new clutch and shot some photos.

There has been discussions about lightening the rear flywheel. In the pics my old lightened flywheel is in comparison to the new one. For records the old one is lightened from 7.5 to 5.2 kg. The assys and the disk plates are there as well.

I didn't decide yet whether to use the 4.5 or 5.5" clutch. Both are capable of 1100 Nm

The 5.5" I'll machine down to 2 disk and the smaller probably as well. Neither is a bolt on but can be made to fit with pretty decent work. The flywheel weighs 952 g for the 5.5" clutch and the smaller one will be just under but I don't have it yet. I won't bother you with inertia but is is LOW.

TS_turbo · Post by **TS_turbo** » Fri Jun 22, 2007 9:33 am

Micke exelent work

what material and what thickness of 900 gr flywheel ?

Micke · Post by **Micke** » Fri Jun 22, 2007 10:50 am

Flywheel is steel. Thickness varies all over the thing.
Available from here:
http://racingclutches.com/content/product.asp

Mats · Post by **Mats** » Sat Jun 23, 2007 4:36 am

will it even be drivable with that?

Micke · Post by **Micke** » Sat Jun 23, 2007 4:53 am

NO! I chose it to get the car lighter to push around

BTW, This topic should be moved to the racing department. This is definitely nothing for street driving. 7.25" clutches are still OK for that.

Barry · Post by **Barry** » Sat Jun 23, 2007 7:37 am

Barry · Post by **Barry** » Sat Jun 23, 2007 7:39 am

Micke,ever welded a clutch together like that??
Did so on a 24v turbo at an all tar rally..new 7"AP Racing..welded plates ..

Micke · Post by **Micke** » Sat Jun 23, 2007 9:52 am

Welded?
I don't follow. What did you weld?
I'm pretty sure I didn't do any welding on the clutch though.

Barry · Post by **Barry** » Sun Jun 24, 2007 12:23 am

You slip them sintered plates with enough torque for long enough you weld the whole shebang solid!
Simply asking...

Micke · Post by **Micke** » Sun Jun 24, 2007 12:49 am

With 1100 Nm capacity in my 1.86 NA engine I don't think it will slip a lot

The only problem i foresee is standing start. I already had it with the old one. I tend to spin the wheels too much. Guess I need to practise starts.

Mats · Post by **Mats** » Sun Jun 24, 2007 2:29 am

Oh, you used to have rolling starts? That explains a lot actually.

Micke · Post by **Micke** » Sun Jun 24, 2007 5:56 am

No, we do have standing starts. But only one per race

TS_turbo · Post by **TS_turbo** » Sun Jun 24, 2007 9:32 am

Micke wrote:With 1100 Nm capacity in my 1.86 NA engine ...

1.86 ? 155 1.8/1.7 ts 80mm stroke crank + overbore pistons or somethink more exotic

Mats · Post by **Mats** » Sun Jun 24, 2007 11:07 am

Micke wrote:No, we do have standing starts. But only one per race

If you're lucky...

Micke · Post by **Micke** » Sun Jun 24, 2007 12:00 pm

Never had more than one start. If there are two it's called "2 races"... .. .

75 TS. 85x~82

Light clutch + flywheel