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Gleb
07-08-2006, 01:37 AM
What do you guys think of a lighter flywheel for a '87 325i. What brand? Any side effects? My car is mostly track.
Also check out www.signaturemotoring.com and please tell me what you think.
Thank you.

static
07-08-2006, 12:06 PM
not going to be much difference with stock e30 Getrag tranny. I heard it's got light (singlemass) flywheel already.
In my case the stock dualmass flywheel was around 30lb, so it was amust to go for something lighter (11lb in my case).
There was a bit of a difference between my old (M20) tranny feel and the new light flywheel.
If your opening the tranny anyways, some people just machine the stock singlemass flywheel (i heard impossible for dualmass) so do this if you can find a person who can do it for cheap.

flywheel is good and noticable for first 2-3 gears. You can also do the pullies with similar effect.

Jordan
07-08-2006, 01:05 PM
I had the stock flywheel (19lbs) machined down to 11 or 12lbs.

Made a huge difference.

ZiMMie
07-08-2006, 01:55 PM
buy another flywheel and get it machined. m20 flywheels can be shaved down as jordan said. u will have a shitty idle but it will improve ur acceleration.
Go see Doug @ Competition Automotive. tell him Mike sent u from PartSource l
its about 60-80$ to get it done. last time i spoke to him.

395 Red Maple Road,
Richmond Hill, ON L4C 6P3
Tel. : 905-889-0486

Jordan
07-08-2006, 01:58 PM
u will have a shitty idleNo you won't.

ZiMMie
07-08-2006, 02:09 PM
No you won't.
From wat ive read, a lighter flywheel has a louder idle due to material removed from the flywheel which absorbs most of the gear chatter from the transmission. so will that makes is car idle lke shit since u can hear a bit of gear chatters?

Jordan
07-08-2006, 07:40 PM
Do you have one in your car?

I had a shit ton of mods done to my car.

The idle was still a nice solid 750rpm +-10

ZiMMie
07-08-2006, 09:02 PM
Do you have one in your car?

I had a shit ton of mods done to my car.

The idle was still a nice solid 750rpm +-10
Good for u.

No i dont, but will soon have one in, ive driven cars with lighter flywheels which had a louder idle due to the lightend of the flywheel.

Some do expericece idle issues others dont. So good job for makin ur car idle that low.

static
07-08-2006, 11:56 PM
the idle issue with lightweight is the gear chatter/rattle, not erratic idle

it can be muffled halfway with heavier (gear) oil used in tranny

Jordan, you don't have an e30 anymore, what are you still doing on this forum?
BTW, what do you think of e36's numbness?

Jordan
07-09-2006, 12:39 AM
Jordan, you don't have an e30 anymore, what are you still doing on this forum?BTW, what do you think of e36's numbness? Just because I don't currently own a e30 doesn't mean I don't still have interest in them. I have great plans for the future... This e36 isn't numb, don't know what you are talking about.

Gleb
07-09-2006, 01:15 AM
Thanks guys, but what do you think of buying one from a performance parts specialist? Also what do you think about this heat shield www.signaturemotoring.com

Jordan
07-09-2006, 11:29 AM
Don't waste money on a aluminum flywheel, just have the stock single mass flywheel machined down.

Stop plugging your website, that heatshield is garbage.

d.maczko
07-09-2006, 12:16 PM
what type of flywheel comes on a 325e?

single or dual mass?

Jordan
07-09-2006, 02:48 PM
big heavy dual mass, and you can't swap it out in favor of the single as it has sensor pickups on it.

Luke318is
07-09-2006, 04:32 PM
Jordan, what would you suggest doing with the flywheel in my m42? Mine has a dual mass, correct?

will a single mass fit right in?

I dont know much about this, but its something ive wanted to get done for a while.

Thanks

Gleb
07-09-2006, 06:09 PM
Don't waste money on a aluminum flywheel, just have the stock single mass flywheel machined down.

Stop plugging your website, that heatshield is garbage.

That is not my website, I was just asking, take a pill.

The Sly
07-10-2006, 01:00 PM
From wat ive read, a lighter flywheel has a louder idle due to material removed from the flywheel which absorbs most of the gear chatter from the transmission. so will that makes is car idle lke shit since u can hear a bit of gear chatters?

Your both right
THe idle should be the same but could be noisy
I had some issues with a lightweight flywheel with the noise at idle..
I would suggest to make sure it is balanced..
And yes get a single mass, go and get it shaved then balanced
Don't forget to check the bearing in the crank at the same time..

My first engine rebuilt had a crank from a auto and i forgot to put one in.
That will make the tranny noisy at idle.


Sly

Febi Guibo
07-14-2006, 12:54 AM
For my M42, I had an M20 single-mass flywheel machined down to around 10# ...it idles as normal and takes-up like stock ...I drive in NYC traffic.

It makes a big difference in power and acceleration

ACHTUNG
07-25-2006, 01:25 PM
My flywheel is shaved down to 12lbs. It idles the same, there is no chatter. It revs so much faster now

Luke318is
07-25-2006, 02:57 PM
I had the stock flywheel (19lbs) machined down to 11 or 12lbs.

Made a huge difference.


What parts do i need to put in a flywheel from an m20 into my m42? and how much does machining it usually cost?

craz azn
07-25-2006, 06:28 PM
I had the stock flywheel (19lbs) machined down to 11 or 12lbs.

Made a huge difference.

Stock m20 flywheels are Cast Iron right??

I've heard that you can turn cast iron but then it won't be as strong.... there was a Datsun 240z at Mosport a couple weeks back and the flywheel blew up, somebody suggested because it was machined... this true?? BTW that person said that only steel flywheels can be machined with no adverse effects... any opinions on this?? Jordan?

Jordan
07-25-2006, 06:48 PM
They are steel, not cast iron... I don't know what moron told you that.

craz azn
07-25-2006, 06:59 PM
wheeeeee..... I was getting worried there for a bit about machining mine... good, got that sorted. Thanks Jordan

Luke318is
07-27-2006, 11:00 AM
LOL cast iron betty crocker flywheel.