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Old 07-19-2008, 12:23 AM   #1
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Default Lightweight Flywheel

Who makes a lightweight flywheel for our cars?

do flywheels from different models work as well?

thanks - Justin
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Old 07-19-2008, 01:15 AM   #2
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In speaking to my mech, while the flywheel is heavy it does provide some of the torque. In other words LTW fly= less torque.

Does this make any sense to anyone else?

I have driven another Ti with lightweight fly but it was also DASC stage 3 and had some torque to lose prolly.
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Old 07-19-2008, 02:49 AM   #3
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if you go to understeer.com i pretty sure they show 318ti with a fidanza flywheel on it. for a e36 m3. im guessing that could work
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Old 07-19-2008, 03:30 AM   #4
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Quote:
Originally Posted by 96cali View Post
In speaking to my mech, while the flywheel is heavy it does provide some of the torque. In other words LTW fly= less torque.

Does this make any sense to anyone else?
yes this is true, the flywheel provide some of the rotating mass of the engine therefore it is easier to accelerate from a stop. however this extra mass also slows down the speed at which the engine rotates. so though a lighter flywheel may impede daily driveability, it improves acceleration on a performance oriented car.
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Old 07-19-2008, 04:19 AM   #5
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A lightweight flywheel will free up the extra horsepower it takes for your engine to spin the heavier flywheel. The stock flywheel is good because it holds the RPMs for a few moments between shifts and whatnot, but a LTW flywheel will allow the engine to reach those RPMs faster. While a LTW flywheel won't increase horsepower, it will free up lost horsepower. On the 4 banger, I'd say it's a waste because our cars tend to show more power around 4000 RPM. On a 6cyl, LTW flywheels make a huge difference. I just bought an 8.5lb flywheel for my s52 and I'm a little worried about the driveability around town or in stop and go traffic. It's not a deal breaker by any means, I'll just have to learn to deal with it.
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Old 07-19-2008, 04:23 AM   #6
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8.5 lbs? wow jess, that little baby is going to be a handful on the street... you'll have to drive it like you stole it

It seemed to help the 4bangar a LITTLE bit with my LTW flywheel, but probably just on the ass-dyno. Did feel like a little lose of low-end on the uphills though... but it definitly felt abit quicker.

FWIW, Fidanza makes a 13lbs one for M3 clutch, which is what I have... I believe Ireland Engineering makes one thats around 8lbs... UUC makes a couple different ones too.... I think the 13 is a nice balance.

Probably not worth it though unless you go for the M3 clutch, imho.
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Old 07-19-2008, 06:00 AM   #7
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so an m3 clutch and flywheel will work on my m44 with stock gearbox?
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Old 07-19-2008, 01:00 PM   #8
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The one on understeer.com is 11.5 pounds and it's paired with the M3 clutch too.
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Old 07-19-2008, 09:01 PM   #9
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Quote:
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so an m3 clutch and flywheel will work on my m44 with stock gearbox?
Yeah dude, flywheel bolts right up to the motor. Bellhousing fits right over, and gearbox works fine.

Although you may want to consider getting a M3 clutch slave cyl as well if you go this route.

My kit was $700 or so on Ebay... kit included a heavyduty M3 clutch and pressure plate, release bearing, and 13lbs fidanza flywheel.... I think they still offer the kit, seller to look for is "Gripforce"
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Old 07-21-2008, 01:02 PM   #10
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Contact Metric Mechanic - they have a light flywheel + M3 clutch package for $780 (or was it 870 - not sure, but disleksia sure sux LOL)... good company - decent price.

Quote:
Originally Posted by the tech View Post
Who makes a lightweight flywheel for our cars?

do flywheels from different models work as well?

thanks - Justin
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Old 07-21-2008, 02:05 PM   #11
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Quote:
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The one on understeer.com is 11.5 pounds and it's paired with the M3 clutch too.
This is the car I drove. Felt awesome but like I said it was stage 3 Dasc, so a little different hp than stock.
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Old 07-21-2008, 08:01 PM   #12
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Oh yea you drove the Understeer.com car? How was it?
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