e flywheel vs. i flywheel

[E30Alex]

Does anybody know the difference?

Can an e flywheel be used with an i engine and clutch?

[golde30]

e is dual mass, clutch is solid center. i is single mass, sprung center. clutch and flywheels are not interchangleable, must be swapped together. you dont wanna run an E flywheel on an I car anywayz, thats just stupid.

[SamE30e]

You don't want to run a e flywheel on a e either but thats just how BMW rolls... Curse my e to hell!

[E30Alex]

e is dual mass, clutch is solid center. i is single mass, sprung center. clutch and flywheels are not interchangleable, must be swapped together. you dont wanna run an E flywheel on an I car anywayz, thats just stupid.

Still have your flywheel for sale?

[golde30]

Still have your flywheel for sale?

yeah i still have a flywheel for sale. i had 2 sold 1. the one i have is freshly resurfaced, the only problem is that i left it at the shop for like 6 months, and still havent picked it up. its paid for, i just never got around to picking it up...LOL.

[E30FreaK89]

when i did my 5 speed swap i took all the parts from an 85 325 and it had a single mass flywheel....

[rThor432]

84-85 etas have single mass flywheels that weigh in at ~23ish lbs. The "i" flywheel weighs about ~19 lbs. Late eta dual mass flywheels weigh something like ~28-29 lbs. Horrible weight.

I have a early single mass flywheel in my '87 eS.

I weighed all of the different flywheels a couple of weeks ago because I was curious.

[h82crash]

I flywheel in e tranny?

I've been searching but I can't find a difinitive answer, so sorry for bumping this thread.

I'm building a stroker and I'm wondering if the i flywheel will work on the eta transmission. I always assumed the trannys were the same but someone here said they were different.

So, can I put the i flywheel on my super eta block/crank and put it in my stock eta tranny?

[Aptyp]

Not all E's have dual mass, only the last year of production. I think they started 5.86.

My 4.86 eS had a single mass flywheel.

[h82crash]

Well, mine was built 5/87. Will there be a problem? If so, what could it be? I guess I have to wait until I get my motor out and see.

[Aptyp]

deff. dual mass.

Put the I flywheel on, and since you're building a stroker, convert to 1.3 motronic while you're at it. I imagine you're using I head as it is.

Difference is that E has those 2 reference sensors in trans bell housing. I has sensor on the front of the engine and one on ignition wire.

Use I flywheel and I clutch and you'll be fine. if you want to use same bell housing sensors you can, but make sure that flywheel has reference marks or dowel pins.

[h82crash]

THANK YOU! Yeah, I got a whole complete i engine with harness and I'm putting a seta block under it all. So I can just put the i fw and clutch on and disconnect the tranny sensors if I use the 1.3 harness, cool. Just thankful there aren't any dimensional differences.

[Sean]

84-85 etas have single mass flywheels that weigh in at ~23ish lbs. The "i" flywheel weighs about ~19 lbs. Late eta dual mass flywheels weigh something like ~28-29 lbs. Horrible weight.

I have a early single mass flywheel in my '87 eS.

I weighed all of the different flywheels a couple of weeks ago because I was curious.

You weighed a late I style flywheel, and it was only 19lbs? are you sure it hasn't been lightened, that doesn't sound right to me... Interesting.

[Aptyp]

wait a second, sounds bad.

My I flywheel was 16.8lbs. weighed it, my dual mass E flywheel 23.9lbs.

How did you weigh them?
I never weighed early single mass flywheel, but there's no way in hell it weigh 1 pound under dual mass. It's about the same size as I flywheel minus 2 pins.