oldpro

I am looking for a 19# steel flywheel for my zr1 anyone know where I can obtain one

FU

I would give Jerry's Gaskets a call. He'll hook you up.

Paul Workman

Just FYI, I believe Pete Polatsidis is using a DRM, 19#(?) steel FW. However, Fidanza's aluminum FW comes in close at 13# (IIRC), and has bolt-on friction plates that can be replaced if need be. Just a thought.

IDK if there's much practical difference between the 13 and 19 pound FWs, especially when compared to the 46# dual-mass (stock) FW; the gist of the reduced mass FWs is realized by either of the two single mass (as they're reasonably comparable weight-wise, methinks). My point being, the renewable friction surfaces of the Fidanza was a selling point for me. (And, I love the added 'snap' in acceleration allowed by the reduction of FW mass, especially in lower gears!)

FWIW...

whalepirot

"Mike Norcia @ RAM Clutches will make the flywheel completely out of steel.....you just have to ask him. ", is what I was told when shopping for similar.

billy mild

What about vibration or noise?

Dominic Sorresso

If it's a single mass, the ZF-6 will rattle regardless of material.

whalepirot

Only an issue (sort-of) in neutral, with the clutch out. It is not damaging.


I suspect that the heavier steel, will rattle slightly less, simply b/c of physics. That heavier mass is slightly less affected by engine firing pulses. In my car, the exhaust mostly masks that noise.

Dominic Sorresso

WP,

The heavier steel FW will certainly have some more inertia, but don't forget the stock dual mass was significantly heavier and w DM to absorb the engine pulse. Careful idle and part throttle tuning goes a long way to minimizing the uneven engine pulse that leads to the ZF rattle.

oldpro

I have a fidanza right now . the reason I wanted to go to the 19lb ,I want to switch out my 410 gears and go back to the stk 3.45s and thought that the little extra weight would help with the take off from the stoplight . .also I don't plan on going to the drag strip much anymore.

Dominic Sorresso

I have my stock set of 3.45s for sale. In excellent shape. Have 3.73s now but thinking of 4.10s since I have 19" wheels in back. Too bad ur in CA.
I'd swap pumpkins w you.

whalepirot

Mike told me the custom steel FW I have weighs about the same as the 4+3's. I absolutely LOVE the ZF6 w/3.54s in the car for all around street driving. I still need practice launching from lights, tho. You obviously understand inertial effects on real world driving.

oldpro

yeah , I know not too many zr1s out here. I am going to bill boudreaus later this week to install a 28 lb flywheel.my 410s were done by corey and have the viper gears . if there is anyone living in the phoenix area that wants to trade pumpkins while I am there pm me .

Hib Halverson

Far as I know, no one makes a lightweight steel flywheel for an LT5.

There are number of sources for aluminum flywheels. I have a McLeod aluminum wheel in my '95 which has been there for 15 years. I have the stock 3.45 axle and have never needed more flywheel mass that that for around town driving.

Also, I've heard that there is a lightweight. nodular iron flywheel from a Camaro that fits an LT5.