e36m42 flywheel? twin mass or single mass?

[selespeed]

hi;

I am running an e30 with a/c with a motor from e36m42. at the moment I am using m40 single mass flywheel. I would like to know what the original equipment for e30 m42 is? some say twin mass and some say single mass.

I do not have any desire to modify. I use the car for everyday use and hence acceleration. I just want to keep the engine as original as possible!

according to http://bmwfans.info/parts-catalog/E36-C ... #1739315_1
only vehicles with A/C would use twin mass. but is this important?

thank you.

[mcspike]

Is there a problem now?

[selespeed]

Engine vibrations up to 3000 rpm.

[Andyboy]

They are all single mass on the M42 despite all that 'twinmass' nonsense on Realoem. Only very late M43 and M44 1.9's with AC had a dual mass flywheel.