Hi I need all your expert help with flywheels

[driftin jo]

i'm really not sure now it could even be an NM 2.0 20v

[BenC30]

lol

[BenC30]

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[spink]

NM and 7a uses the same flywheel,that part number you gave IS a 7a/NM flywheel,the chance of finding an NM engine is the UK is slim to non anyway

[driftin jo]

Right , I would of helped if you had taken the photo from the top as you may be hiding the pin from the angle of the photo , however from the diameter of the ridge I don't think there is a pin so it is most likely an NG .
For reference here is a pic of the back and front of a 7A flywheel, note the pin on the back next to the ridge and the diameter of the clutch contact surface on the front.

[driftin jo]

NM and 7a uses the same flywheel,that part number you gave IS a 7a/NM flywheel,the chance of finding an NM engine is the UK is slim to non anyway

As I said before , don't trust the numbers , they may deceive you , if no pin on the back then its not a 7A/ NM .

[BenC30]

ah i see the pin now... ill have a look when i get back to work, i certainly didnt spot a pin like that, wonder if its fallen out.

[mcandmar]

and this, i beleieve is a 3b flywheel



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Just to add to the confusion, that flywheel looks like the Audi 100/200 3B engine as it dosent have the bearing. Vs S2 3Bs that have the centre bearing.

[BenC30]

Ok so our flywheel has no pin for the pulse pickup....

[20Vcqdriver]

It's been said the 3B is the lightest, anyone put and actual figure to it in Kg.
Looking at a lightened flywheel possibly next year but do not want anything radically lighter that it upsets the normal running. Cheers

[Zoig]

The 7A flywheel should be 12Kg, I also had the clutch surface reworked and backside machined down, got it to 10.45Kg, witch should be enough for daily use, whilst still beeing a lot lighter that stock AAN dualmass(ca 14KG)

[BenC30]

wow 10kg is still real heavy, id say 7kg is ideal.

If any of you guys want lightweight flywheels go to this guy!!

http://www.ccc-motorsport.de/online-shop.html?page=shop.browse&category_id=66

[Zoig]

Well total 70€ for 7A flywheel and getting it a bit lighter, compared to 399€ + shipping € for ccc motorsport flywheel, i'd say i still have a LOT more imptrant things to do than loose another 4Kg from my 10.45Kg flywheel

[BenC30]

have you seen what happens when a cast iron flywheel fails.... OUCH!!!

Anyway.. thanks for all your help folks, I may be back LOL