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Lightweight Flywheel Yes or No?
After searching this forum, I've come up with the following conclusions:
pro's
-increased throttle response
-increased acceleration most notably in lower gears, but noticeable even on freeway
con's
-rattles when clutch is let out at idle
-possible chance of ratter at unpredictable times
-flywheel shattering
-difficult to use in stop and go traffic
-hard to go up a hill with
I haven't found a single thread regarding quantifiable objective gains from a lightweight flywheel, some people just claim it's a night and day difference while others claim it's not that much faster.
So finally, my question is has anyone had increased 0-60 times? 1/4 times?
| | Reply » Lightweight Flywheel Yes or No? |
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| | Reply » Lightweight Flywheel Yes or No? |
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| | Reply » Lightweight Flywheel Yes or No? |
Quote: After searching this forum, I've come up with the following conclusions:
pro's
-increased throttle response
-increased acceleration most notably in lower gears, but noticeable even on freeway
-reduced transmission losses: increased RWTorque and Horsepower
con's
-rattles when clutch is let out at idle
-possible chance of ratter at unpredictable times
-flywheel shattering
-difficult to use in stop and go traffic
-hard to go up a hill with
I haven't found a single thread regarding quantifiable objective gains from a lightweight flywheel, some people just claim it's a night and day difference while others claim it's not that much faster.
So finally, my question is has anyone had increased 0-60 times? 1/4 times? | I just edited your original post.
| | Reply » Lightweight Flywheel Yes or No? |
unless your car is turboed or charged, then it doesnt benefit as much for NA cars, waste of money IMO..$600 for a flywheel is absurd..for minimal gains, unless you only track it, stop and go traffic really blows
| | Reply » Lightweight Flywheel Yes or No? |
Quote: | -increased throttle response | Mostly when the clutch is decoupled; rev-matching and the like. There is an improvement while the whole drivetrain is linked up, but it's not as tremendous as it is during rev matching.
Quote: | -increased acceleration most notably in lower gears, but noticeable even on freeway | I don't have any hard data to support any performance related conclusions - didn't bother to clock the car before and after.
If nothing else, it does make a difference in how the car drives.
Quote: -rattles when clutch is let out at idle
-possible chance of ratter at unpredictable times | Note that "flywheel" chatter is actually coming out of the transmission input shaft. Mine rattles with the A/C compressor engaged or when the transmission is hot (fluid thins out). It's not particularly noticible with the windows up and the radio on. Thicker fluid will quiet things down a bit - or a new trans. A worn trans is going to generate more rattle than a fresh one.
Doesn't bother me, but it's a personal thing.
Quote: Maybe if the flywheel is a POS. A well made lightweight shouldn't come apart under any circumstances (what do you think they're running in the Spec cars and GT race cars and so forth? Certainly not dual-mass, I can assure you). I track and autocross my car on a fairly regular basis without issue.
As usual, you get what you pay for.
Quote: | -difficult to use in stop and go traffic | This is subjective and probably depends heavily on the flywheel and clutch that you're using. I don't have a problem with mine and I don't find it annoying or troublesome in traffic. The clutch I use is remarkably stiff and fairly unforgiving compared to the self-adjusting rubbish they use in the today's stock 3er and 5er, but that's how I like it.
I suspect most (if not all) of the complaints related to difficulty of use are coming from people who simply can't drive well.
Quote: | -hard to go up a hill with | Absolute myth. Anybody with an understanding of basic physics should know better.
A lightweight flywheel reduces the inertia of the entire drivetrain, which of course increases the efficiency of said drivetrain. Less energy is wasted on overcoming drivetrain inertia. The engine's power is what propels the car up a grade - increased drivetrain efficiency can only help, not hurt.
P.S. I have the UUC Stage 2 (8.5 lb) flywheel.
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Lightweight Flywheel Yes or No?