I already know the weight of a stock S4 turbo flywheel is 26 to 27 lbs.

I heard S5 is lighter...

But what about the weight of a S4 N/A?

 

i believe it is 27.8lbs, check rx7.com for sure, but you can swap to a 12lb one

 

Yes, I like my nice aluminum flywheel. My precious....

 

IIRC, S4 N/A FWs are 22lbs.

For the record, that's Way Too Freekin Heavy.

Brandon

 

what is the difference between say a 12lb alum vs a 12lb steel flywheel? Is it heat displacment? Which do you guys think is better? I heard somewhere not to use alum on the street, but i didnt see a clear reason as to why not.

 

Steel probadly doesn't flex as much and steel holds the heat in more.. I assume so..

 

Generally, steel flywheels are heavier for a given size. Aluminum flywheels are almost always lighter, but need a seperate steel friction surface, which must be replaced instead of turned, like you can do with a steel flywheel.

Brandon

 

i know that when i took my s4 n/a flywheel out to resurface it umm it felt like it was wround 30lbs. it was pretty damn heavy.
jack

 

From Racing Beat's catlaog:

Stock Flywheel Weights

1974-1980 - 30 lbs
1981-85 RX-7 - 23 lbs
1986-88 RX-7 (non-turbo) - 24 lbs
1989-92 RX-7 (non-turbo) - 22lbs
1987-88 RX-7 (turbo) - 28 lbs
1989-92 RX-7 (turbo) - 22 lbs
1993-95 RX-7 - 19 lbs

 

Um, you are aware that you can't just swap S4 flywheels with S5 flywheels, right?

Or that you can't just throw on a 12lb aftermarket flywheel without an automatic's counterweight?

Maybe you do, maybe you don't, I'm just post whoring.

PaulC

 

how much does the S4 TII flywheel weigh? i thought that they were almost the same, just wondering.

 

damn, i just read that post with the weights after i already posted

 

Has anyone replaced their flywheel? How long did it take? Was it difficult to do? I was thinking about getting a light flywheel but I don't know who much work is involved in the switching.

 

make sure you have a massive 2 1/2 inch socket to get that ************ off.

 

how long did it take to switch them?

 

2-1/8 socket, not 2-1/2

 

54mm right?

 

yea, sure. Why not?

 

I had a light steel flywheel put on at KDR, and it makes for very quick reving, but getting that son of a bitch going from a standstill, uphill, takes a good bit of practice. I wouldn't trade it for the world.

 

My stock s4 is 24lbs. I had a lighend one in the works but the machinist had his head up his *** and made the friction surface too close to the hub so the pressure plate wouldn't engage. (gotta do everything yourself if you want it done right)

Fortunately it was the parts car flywheel and I just threw it in the shed. I'm gonna go aluminum when I do the TII tranny swap anyways.

hear that liquid? I'm running a damn 24lb flywheel... I bet she'll really pull out of the hole with a lightweight one in there.


oh, and its really not hard at all as long as you have an impact wrench and the 2 1/8" socket. getting the taper lock loose can be tricky sometimes. Why don't we share some secrets on how we all get them loose? I use the BFH method to get her to pop off.