Help choosing a flywheel

[blocke]

Im all confused about what flywheel to go with for my 90 325i. My clutch has started slipping bad, so while im in there replacing everything, I would like to upgrade my flywheel. Only condition is that I need to do the whole job in 1 pass, so I cant remove my stocker and take it to have it resurfaced. Need everything there and ready to go.

So the options im considering are:

1.Purchase a stock, have it resurfaced and lightened up a bit.
2.Purchase a Euro 323 thats already been resurfaced (do I need to order a different clutch kit for this? Will stock m20 starter work?)
3.Go balls out and purchase an 8lb JB racing flywheel (what disk/PP to use?)

Now I plan on keeping the M20 stock for now, but POSSIBLY plan on either going 2.7-2.9 stroker or 24v swap in the next year or so. At that point, would the flywheel I choose now still work?

Help me out here!

[jlevie]

If you want a lighter flywheel and an upgraded clutch, your option are:

1) Purchase a used single mass flywheel, have it lightened, surfaced, and balanced. Couple that with a ClutchMaster's Stage I clutch if a street car or a Stage II Kevlar if a track car. Or use a Spec Stage 1/2.

2) Go with a JB Racing flywheel (those are a real piece of work) coupled with either of the clutches above. Bimmerworld has package deals of the flywheel & clutch.

Be aware that a lightened flywheel is probably going to cause input shaft rattle in neutral with the clutch engaged. How loud it will be be is a function of how much wear is present in the input shaft bearings. This isn't a problem on a track car but can be annoying on a street car.

If this is a street car, don't go to aggressive on the clutch. I had a ClutchMaster's Stage I on my previous Spec E30. It was easy to drive on the street and is all you usually need in an E30. My new Spec E30 has a Spec Stage 3 (http://www.specclutch.com/products) and is a whole different beast. Driving it on the street requires care as the clutch has very little motion between in and out and is rather "grabby". Coupling an aggressive clutch with a lightweight flywheel will make those problems even worse.

[blocke]

jlevie, thanks for the input. The car is currently 100% street driven, and I drive maybe 15 miles a day if that..so I will not be going with a "heavy" clutch. Just want one that doesnt slip like my failing stocker, but will hold a little extra power if I decide to upgrade things a bit.

How about the euro 323 flywheel? From what Ive read, they weigh around 12 lbs, which is what they can machine the stock 325i one down to anyway. Would that be a better option? And if I go with that flywheel, what clutch and PP do I order? For a 323 or 325?

[jlevie]

I don't know anything about the Euro 323 flywheel.

If the car is strictly a daily driver. Get a single mass flywheel and have it resurfaced. Mate that with a stage 1 clutch and skip the lightening.

[imwhyteyo]

can you use an oem sachs clutch on a jb racing flywheel?.. im going to attempt this and want to know as soon as i could if its a problem... i dont launch from a dig, im very casual with my driving, im just concerned about additional wear.