325i Flywheel Swap?

[FrustratedMunky]

Has anyone done this swap in their E30 before? I'd like to know how different it feels, an opinion on if it was worth it, and how much did it cost for the parts? Thanks.

[Jordan]

On a eta I'm assuming? If so no. Your eta will not start/run with a 325i flywheel.

[FrustratedMunky]

Well, whatever was listed on the Tech article that they have.

Flywheel - A major problem with the M42 was that it had BMW’s 'dual-mass’ flywheel; yes, it weighs almost twice as much as a 325i flywheel (as the name would suggest), at 28.5 pounds. This is a big problem and absolutely kills 1st and 2nd gear acceleration. Ever wondered why your 318iS’s 0-60 was so slow? Well, the flywheel is one of the reasons. There are 3 options to fix this: 1) use a 325i flywheel/clutch or 2) buy an aluminum flywheel for your M42's clutch, and 3) an aluminum flywheel for using the 325i clutch. Buying an aluminum flywheel for the M42 runs about $500-700 but is very light, and requires no modification to be fitted. M42 aluminum flywheels are about 12 pounds, and 325i aluminum fly's are about 8 pounds. The 325i flywheel requires a few other modifications to be fitted in the 318iS. Here’s what you need: 325i flywheel, 325i clutch, 325i pressure plate, 325i drive-pinion for the starter motor, and a ‘78-’83 323 throw-out bearing. Replace all these with the 318iS parts and it bolts right together. After all is said and done, your 318iS will have a LOT better acceleration in the first few gears, and deceleration will take place much quicker, which helps on the street and in the auto-x.

Along with all of that other stuff I mean.

[e30Matt]

Do you own a '91 318?

[Jordan]

Yeah, it does help us if you mention what car you have, and perhaps what engine you have.

None of us are mind readers.

[FrustratedMunky]

Sorry, I'm running an M42 on a 1991 318IS