Flywheel dilemma - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
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#1 (permalink) Old 03-23-2004, 06:29 PM
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I am thinking about putting in a lightweight flywheel in my 92 325i. I know lightweight flywheels are supposed to improve the throttle response and increase pickup by removing some of the rotational mass, but I also heard bad stuff like occasional stalling and gear rattle in idle. Does that also apply to the e36?

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#2 (permalink) Old 03-24-2004, 10:49 AM
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Havn't heard of the stalling but the rough idle is the same in e36 as any car. You can fix that problem with a new chip.

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#3 (permalink) Old 03-24-2004, 12:39 PM
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Originally posted by Andrewsd1985@Mar 24 2004, 11:29 AM
Havn't heard of the stalling but the rough idle is the same in e36 as any car. You can fix that problem with a new chip.
I already have an autothority chip installed... how would that fix the gear rattle?

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#4 (permalink) Old 03-24-2004, 01:27 PM
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The stalling comes from the removal of that rotating mass. It is just on takeoff and the driver can quickly adjust their driving style to prevent stalling. The gear rattle is because most lightened flywheels are single mass not dual mass. A dual mass flywheel dampens vibration transmitted through the drivetrain, A single mass allows the vibration to be transfered through the clutch and into the gearbox. For about the first 85 years of automobiles all flywheels where single mass, so it is not that big of deal. It will be a little noisier is all. I do not know if a chip will effect the rattle at all.
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#5 (permalink) Old 03-24-2004, 01:42 PM
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Originally posted by Mach 5@Mar 24 2004, 02:07 PM
The stalling comes from the removal of that rotating mass. It is just on takeoff and the driver can quickly adjust their driving style to prevent stalling. The gear rattle is because most lightened flywheels are single mass not dual mass. A dual mass flywheel dampens vibration transmitted through the drivetrain, A single mass allows the vibration to be transfered through the clutch and into the gearbox. For about the first 85 years of automobiles all flywheels where single mass, so it is not that big of deal. It will be a little noisier is all. I do not know if a chip will effect the rattle at all.
Ben
Ben, would the spring-hub M5 clutch solve the problem? The clutch itself looks like a dual-mass setup... but it's about twice the price of a M3 clutch that I would have to install... do you think it's worth it?

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#6 (permalink) Old 03-28-2004, 02:15 PM
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check this out...it might give you some ideas
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#7 (permalink) Old 03-28-2004, 03:15 PM
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Originally posted by eloff19@Mar 28 2004, 02:55 PM
check this out...it might give you some ideas
Thank you! This was indeed very helpful !!

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