fc3sfreek

iTrader: (6)

I've heard from some people that a lightweight flywheel really doesnt help out an Rx-7 too much and its really not worth it? Is that true?

sunshine

iTrader: (3)

No, thats wrong. Its perhaps one of the best mods you can do.
However, depending on you mechanical ability and resourses, it can be a challenging job.
-a

fc3sfreek

iTrader: (6)

yea thats what i thought. now would you recommend light steel? or aluminum? because i heard that even though aluminum is lighter, it can break easier that a light steel one can. and also do the N/A and Turbo models use the same clutch and flywheel?

bingoboy

i have an aluminum flywheel, and it's great. i have no idea why people say it makes the car harder to drive. it has really woken the car up and it's so much more fun to drive. i have a friend with the ACT pro-lite on his car and he says the same thing (similar weight to the RB aluminum flywheel, except for T2's but he has a T2 drivetrain on his NA). i also have a friend with the RB lightened steel flywheel, and he says he wishes he'd went with a lighter one than that. i installed the lightened flywheel with a centerforce dual friction clutch at the same time and have absolutely no complaints about either. so much of an improvement over the stock flywheel and worn OEM clutch

-=1OneShotNO2=-

How light is too light though? Ive heard that really light flywheels are bad off the line but better for top end? not sure if thats right or not. i wanted to get one that was 11.5 lbs and aluminum, trying to find out what weight and material would give me optimal low end performance.

fc3sfreek

iTrader: (6)

ok cuz ive seen some on ebay for around $300 which were the 8.5 pound flywheel but i dont think an 8.5 flywheel would hold up too long in a daily driver. and i need to know if i can take my ACT stage3 clutch out of my n/a and put it in a turboII because im getting the T2 swap with the tranny but i dunno if i can use my clutch

vicious525E

one, no the turbo's use a larger flywheel (226mm? maby, not too sure) and as far as the flywheels go, most aluminum flywheels range from t6 to t3 tempered aluminum, t6 being stronger then the t3. most also use friction plates (i wouldnt recomend getting a flywheel that doesnt and is aluminum.) that are usually carbon alloy or some other semi hard steel. aluminum flywheels are nice because usually if the friction plate gets hurt in any way you can usually just replace that and keep the flywheel. most solid aluminum flywheels that dont use friction plates can only be resurfaced so many times before it is trash. as far as steel flywheels go, i dont know too much about them, all the ones i looked at where too heavy for my driving style. btw: mine weighs in at 9.5 lbs

bingoboy

T2 clutches and NA clutches are not interchangeable. the T2 and NA trannies have different size input shafts. also remember that with an aftermarket flywheel you will need the counterweight from an automatic rx7 since the aftermarket flywheel will not be weight balanced like the stock flywheels. the counterweight will add another 4 lbs when you have it bolted to the aftermarket flywheel. you will have to source your own if you buy one that does not come with one.

ddub

The 8.5 lb one you're quoting also doesn't include the counterweight in that. I think the ACT ones are 9.5 lbs before counterweight and like 11.5 with counterweight? Something like that. But those are only for TII also.

I use a Racing Beat aluminum flwyheel, 12 lbs after counterweight and I daily drive my car. It's no problem at all, very easy once you get used to it. I wish I could have a lighter one to be honest

bingoboy

yes lighter one would be better, i agree . my friend got used to driving his 20b NA w/superlight flywheel and triple plate and he drove the NA with the aluminum flywheel and said the revving felt so sloooww heheheh. to tell you the truth, after driving the rx7 like that for a week or so it felt like that was how it was *supposed* to drive and i can't recall how it drove before. i just know sooner or later i'm gonna drive someone's stock NA and be like "ewww".

fc3sfreek

iTrader: (6)

yea ive seen some from racing beat btu damn there expensive which is why im looking at the fidanza one off ebay and just buy the counter weight seperatly

banzaitoyota

you get what you pay for..............

I had the RB AL Flywheel with Counterweight, disk and pressure plate the whole assembly wieghs in at 34lbs., it was OK; however my new engine will be spinning 10K so I went and bought a quartermaster 7.25" Twin disk. Whole assemly wieghs 23.5 lbs wit counterweight.

The important thing to remember its not the reduction in wieght (per say) that is giving you the benefit it is the reduction "moment of inertia, in respect to rotation" that is providing the gains.