l88 flywheel in a Z28

[aaronz28]

who has done it?
any chatter or shudder on take off?

I have a #30 wheel in there now and a McLeod Super Street Pro and it shakes on take off -  i'm approaching 300 miles on the new clutch -  McLeod says give it 500 miles - but I've driven tons of cars with fresh clutches that were smooth as silk


curious if anyone has tried the lightweight flywheel with a torque-less 302 to see how the take offs are.  My car has 3.73s and M20

[bertfam]

Back 45 some odd years ago I had a 57 Chevy with a 327 and a Muncie M20. One of my friends gave me (if I remember correctly) a Hays aluminum flywheel. It had an iron insert that could be replaced, and the weight was around 20 pounds (again, I'm trying to think back that far, so it may have been even less!)

Anyway, I ran it for 2 months before I ripped it out in favor of the stock 11" iron flywheel. Every time I took off, I had to get the revs up to 6k just so the car would move! Anything lower than that and I would either have to ride the clutch, or stall the car! It just wasn't worth the effort.

The L88 flywheel weighs around the same as that Hays flywheel I had, so think twice before using it. They (like the Hays) were meant for racing.

Did you have your original flywheel surfaced before you installed the McLeod clutch? I'm not familiar with the "Super Street Pro", but from their web site it's a dual disc clutch, so it may take a few more miles before everything seats. If their tech support says wait until you get to 500 miles, then take their word for it. If you still get chatter after that, check your flywheel and/or call them back.

Ed

[aaronz28]

got it -  stock 40# it is.

[Kelley W King]

I ran the same Hays flywheel about the same time period as Ed on a warmed L78 in a 67 Chevelle with 373,s. It pulled off well but the engine had a lot of torque and way more power than my tires could stand. I agree I would not try the light weight flywheel on a 302. I put a wide Muncie in my 410 geared Z just for pulling off because of the low torque. The close Muncie is on the shelf.

[crossboss]

Small block hi RPM engines driven on the street using a light aluminum flywheel is not a good idea. You will need to rev the snot out of it just to get it moving. A low torque engine like a DZ 302/Boss 302 will need help in the torque department as much as possible. A cast iron/billet steel flywheel will actually promote some torque from the added weight/inertia. That said, IF you are racing then use the aluminum version. Also, FWIW, I am not a fan of McLeod products. These comments are from experience.

[aaronz28]

I have two Mcleod clutches -  the twin disk RST which I really wanna like - and the super street pro.
the Super Street Pro pedal feels like a toy -   I kinda liked the twin disk pedal feel -  but the noise from not having any sprung hubs is terrible.... SO I'm going with a Ram this time.

[KurtS]

From JohnZ:
I've had good luck with LuK clutches - they're the largest OEM clutch manufacturer on the planet.

I'll add - and they have good feel and hold up for stock applications.

[crossboss]

From JohnZ:
I've had good luck with LuK clutches - they're the largest OEM clutch manufacturer on the planet.

I'll add - and they have good feel and hold up for stock applications.

+1 on LuK. They are OEM to some of Detroit's most powerful cars: Corvette, Camaro, Mustang, Challenger and Vipers. Again, my opinion on McLeod products: stay away.

[bertfam]

Luk is all I use. I have Luk clutches in my 68 Camaro, 69 Corvette, 57 Chevy and we even put a a 12" Luk in my son's 79 GMC K25 3/4 ton, 4 wheel drive pickup truck!! They hold up well.

Ed

[crossboss]

Luk is all I use. I have Luk clutches in my 68 Camaro, 69 Corvette, 57 Chevy and we even put a a 12" Luk in my son's 79 GMC K25 3/4 ton, 4 wheel drive pickup truck!! They hold up well.

Ed

Ed,
The 'best' clutch/pressure plate I used during my vintage racing days was bare none, Hays. Beat the heck out of it, and it never failed!

[aaronz28]

I ordered a Ram HDX for it = organic - 30% stronger than stock - should be good

[red69]

Let us know how it works out, thinking of the same using the same one

[firstgenaddict]

On a road racing course, removing 20# of rotating weight is going to result in better lap time than removing 200# of car weight, but then again removing 2 oz from your reciprocating assembly (EACH piston pin and ring set must be accelerated from a dead stop 2 X per engine revolution) mass will also reduce your lap times more than a 100# reduction in car weight.

[crossboss]

On a road racing course, removing 20# of rotating weight is going to result in better lap time than removing 200# of car weight, but then again removing 2 oz from your reciprocating assembly (EACH piston pin and ring set must be accelerated from a dead stop 2 X per engine revolution) mass will also reduce your lap times more than a 100# reduction in car weight.

Yes, correct. However, 200 pounds removed from the car will also make a dramatic difference in lap times, or ETs. Thats equal to about 2 tenths.