Shave the stock flywheel or leave it alone?
#1
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Shave the stock flywheel or leave it alone?
I believe turbo cars generally benefit from a heavier flywheel (relative to an na engine) but I think 20lbs is retarded heavy and since I'm doing the clutch and need to resurface it should I also get it shaved a few pounds?
Will it even make a noticeable difference if its only 3-5lbs? Or is it just a waste of money?
Will it even make a noticeable difference if its only 3-5lbs? Or is it just a waste of money?
#2
You can't just grind off a substantial amount of material from the surface of the flywheel. It has a minimum safe thickness. I think those who have removed weight from an OEM flywheel have done so by profiling the back side. You'd be better served if you were to purchase a lightweight flywheel from the start instead of having the OEM flywheel lightened. Probably save money in the long run, and the aftermarket lightweight flywheel is still going to be lighter.
#3
Cost me and my girlfriend about $170 to shave the ring down on her 1.6 Flywheel.
We replaced the clutch with an exedy stock replacement that only had a couple hundred miles (cheaper than buying a new one, got it for free) so we had the flywheel machined while it was all apart. Three day turn-around at a local machine shop, $170, and it was about 7-8 lbs. lighter.
Noticeable improvement on accel, and it's not super-stupid light.
-meaty
We replaced the clutch with an exedy stock replacement that only had a couple hundred miles (cheaper than buying a new one, got it for free) so we had the flywheel machined while it was all apart. Three day turn-around at a local machine shop, $170, and it was about 7-8 lbs. lighter.
Noticeable improvement on accel, and it's not super-stupid light.
-meaty
#4
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You can't just grind off a substantial amount of material from the surface of the flywheel. It has a minimum safe thickness. I think those who have removed weight from an OEM flywheel have done so by profiling the back side. You'd be better served if you were to purchase a lightweight flywheel from the start instead of having the OEM flywheel lightened. Probably save money in the long run, and the aftermarket lightweight flywheel is still going to be lighter.
#6
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Either way I'm sure I can deal with the driveability characteristics, I'm more concerned about the trade offs with the turbo and the effects the flywheel will have on boosting.
I am under the impression that lighting the flywheel will negatively effect boost response, something about less load but I'm sure the benefits of lighting will outweigh the boost issue.
#7
I say shave it. I spent $40 to shave the ring off the back of my flywheel and dropped almost 5 lbs, and IIRC I ended up with a flywheel that weighed around 12lbs. The ring on the back of the flywheel is toward the outside of the flywheel so it's exactly where you want weight removed.
So what you end up with is a lighter flywheel that helps with rev matching/etc... without the buzzing/drivability/cost of an aluminum one. Granted it doesn't make as big a difference FI compared to NA, but still worth $40-50 IMHO.
So what you end up with is a lighter flywheel that helps with rev matching/etc... without the buzzing/drivability/cost of an aluminum one. Granted it doesn't make as big a difference FI compared to NA, but still worth $40-50 IMHO.
#11
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just shave it..... i spent 400 on a lightened spec flywheel on my 240sx for the sr20 swap, I loved it to death but 400!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!! way too much to spend for better throttle response IMO
#13
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thats why i might do a DIY gsxr IRTB setup this summer if im bored.. lol im too broke for a turbo right now.
If you have the money, and have purchased a nice clutch... go for it, but on the DIY cheap side... shave it
If you have the money, and have purchased a nice clutch... go for it, but on the DIY cheap side... shave it
#16
I've got a ~8lb flywheel in the car and I can't even tell its there anymore. Could when I first put it in, but after a couple months driving it I don't really notice it anymore.
If I have to replace my clutch I'm selling it and going with a stock 1.8 flywheel.
Gary from the Miata club had his 1.8 flywheel done, get in touch with him and see what his experience was.
If I have to replace my clutch I'm selling it and going with a stock 1.8 flywheel.
Gary from the Miata club had his 1.8 flywheel done, get in touch with him and see what his experience was.
#17
If it's as inexpensive as you guys say about shaving off the weight from the back of the OEM flywheel, then go ahead and do it. I assume that price includes resurfacing the friction surface. $400 for a Fidanza flywheel, you were ripped off unless it was a recent purchase, then I think the falling dollar had a hand in the price. I paid less than $300 for mine about 1.5 years ago. BTW, I don't seem to have a problem with driveability on my car that has a Fidanza 1.8l flywheel and SPEC aluminum clutch. It has excellent street manners.
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