Clutch Choice for M52B30

Mon Dec 12, 2016 12:43 pm

So I'm looking to purchase a clutch for the M52B30 build. Looking at offerings from Helix, CG, Spec etc...but a Sachs E30 M3 clutch seems more cost effective. It's the same diameter as an E30 325i clutch - will it work with my M20 flywheel?

Few other forums suggest it will - and that people have used them without issue for S5x swaps too - but thought I'd question on here - zone rarely lets me down

Sat Dec 24, 2016 12:25 am

Sachs Performance but expensive. Maybe only get a new god brand pressure plate + disc with kevlar friction material (better than ceramic for daily use)

Sat Dec 24, 2016 10:16 am

For your car id be looking at a sprung paddle plate clutch, CG do a dual friction plate which is ok to use on the road too, they are modified LUK or Sachs clutches so the base parts are good quality, and for under £300

Sat Dec 24, 2016 1:05 pm

I like Sachs 618 pressure plates. With an organic disc they can hold 500nm, or 700nm with a sintered type paddle clutch.

http://server.pure-pf.com/webshop2/en/p ... plate.html

Sat Dec 24, 2016 5:51 pm

Cheers for the suggestions guys. Dan - it's the CG dual friction jobbie I was eyeing up. There does seem to be a fair amount of negative feedback floating about the web or CG though? Only thing that put me off. Anyway I've now got a new Sachs E30 M3 clutch sat on my bench now, at £200 delivered it was much cheaper than the aftermarket options. If it doesn't end up being man enough, looks like that 618 pressure plate would be the ticket

Seems some US guys have been running the E30 M3 clutch behind anything up to S54s though so fingers crossed

Fri Dec 30, 2016 12:02 am

Just make sure you get the M20 flywheel balanced. Match it to the crank, pressure plate and front pulley if you have the engine apart. it does make a noticeable difference in the smoothness. My machine shop took about 5-10g off the crank so not much. But had the fly balanced to the crank. Have a look at new M3 fly wheels and are balanced from factory and really look the same as a M20 flywheel. Just remember M3 are four pot and M20 are 6.