Author Topic: Part # for Single Mass 318is Flywheel? (Read 5042 times)

mach schnell · « **on:** February 09, 2009, 08:25:12 PM »

Anyone know what it is?

I was looking around on RealOEM --- is it 11 22 1 739 315 ?

I want to order one.

Thanks!

colin86325 · « **Reply #1 on:** February 10, 2009, 09:54:25 AM »

Yep, 11 22 1 739 315.

You will also need special flywheel bolts (shorter length than for twin-mass flyweel) and a clutch kit specific for the single-mass flywheel.

mach schnell · « **Reply #2 on:** February 10, 2009, 10:58:25 AM »

Quote from: colin86325;66268

Yep, 11 22 1 739 315.

You will also need special flywheel bolts (shorter length than for twin-mass flyweel) and a clutch kit specific for the single-mass flywheel.

Ok thanks!

eric16v · « **Reply #3 on:** February 10, 2009, 02:31:25 PM »

where do you get the clutch kit for the single mass m42 flywheel? what cars had these?

colin86325 · « **Reply #4 on:** February 10, 2009, 03:12:43 PM »

The Euro 318iS had these. For example, look at the Euro 1989 318iS.

FYI the bolts you neeed are 11 22 1 717 841
And the clutch kit is 21 21 1 223 570

I ordered these parts are from the dealer. The flywheel I bought off a guy on another forum.

eric16v · « **Reply #5 on:** February 10, 2009, 05:44:28 PM »

collin you remember how much you had to pay for the clutch kit and bolts?

colin86325 · « **Reply #6 on:** February 10, 2009, 07:13:23 PM »

The clutch kit was something like $230 (?), and the bolts are only about $1-1.50 each (they're cheaper than the normal twin-mass bolts).

Froos · « **Reply #7 on:** February 11, 2009, 01:25:17 AM »

btw that flywheel is the same as any euro e30 318i m40 flywheel, those are plenty over here, but i bet shipping would be a killer

JoeDellio · « **Reply #8 on:** February 14, 2009, 01:08:22 AM »

How much does that single mass FW weigh?

robweenerpi · « **Reply #9 on:** February 14, 2009, 01:42:27 AM »

Quote

http://photos-a.ak.fbcdn.net/photos-ak-snc1/v2109/196/3/1260932318/n1260932318_30269336_7960.jpg

Here is my Euro/M40 setup. I bought my clutch here in the US, some of the bigger retailers like SSF or KW keep them in stock...or used too. You save about 5 pounds from the stock US setup by installing it, but it's still rather heavy. The flywheel has a big ring of weight on the outside edge. The idea is to keep the mass out far to give some more inertial energy. I had all this shaved off my flywheel, and had clutch masters build me a custom stage one clutch off my stock core. The result is a nice sporty 26.5 pound (about the same as a Bimmerworld/JBracing/Clutchmasters E36 M3 lightweight setup) total mass setup. It's a nice peppy setup for my club racing car and would be great on the street.

mach schnell · « **Reply #10 on:** February 14, 2009, 07:19:36 AM »

Quote from: robweenerpi;66496

Here is my Euro/M40 setup. I bought my clutch here in the US, some of the bigger retailers like SSF or KW keep them in stock...or used too. You save about 5 pounds from the stock US setup by installing it, but it's still rather heavy. The flywheel has a big ring of weight on the outside edge. The idea is to keep the mass out far to give some more inertial energy. I had all this shaved off my flywheel, and had clutch masters build me a custom stage one clutch off my stock core. The result is a nice sporty 26.5 pound (about the same as a Bimmerworld/JBracing/Clutchmasters E36 M3 lightweight setup) total mass setup. It's a nice peppy setup for my club racing car and would be great on the street.

That's really cool!

How much do the single mass flywheels weigh?

robweenerpi · « **Reply #11 on:** February 14, 2009, 10:51:12 AM »

I just told you....

You only save about five pounds off the stock clutch and flywheel by using the single mass. It's around 40 something total pounds stock. But you can easily shave off another 10 or so if you want to lighten it, something you can't do with a twin mass.

mach schnell · « **Reply #12 on:** February 14, 2009, 11:49:50 AM »

Quote from: robweenerpi;66509

I just told you....

You only save about five pounds off the stock clutch and flywheel by using the single mass. It's around 40 something total pounds stock. But you can easily shave off another 10 or so if you want to lighten it, something you can't do with a twin mass.

Yeah - sorry - I read back through and found it.

Will a standard OE / stock clutch be able to handle the lightened single mass flywheel (I understand it needs a different clutch to the dual mass flywheel) ?

Or do I need a PP w/ extra straps?

colin86325 · « **Reply #13 on:** February 15, 2009, 05:24:10 PM »

FYI, http://www.bmwfans.info lists the weight of each part in KG.

robweenerpi · « **Reply #14 on:** February 15, 2009, 05:47:33 PM »

Yes the clutch is totally different. I have a stock one I could take comparo pictures of if you wanted, but it's moot because they aren't interchangeable.

You aren't changing the engines power or the grip at the tires, so the stock clutch is probably fine. My car runs bigger stickier tires, will have more power, and good suspension so I went ahead and had the clamp load increased and added extra straps. Clutch choice is important, the wrong material or the wrong construction can make it suck to drive or not last long, or both. This stage one I have is good for general purpose use, but I will probably put a JBRacing/PTT ultralight setup on it at some point to save even more weight.