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rechin23
05-19-2011, 10:26 PM
Hey guys my head is spinning! I have a 68 firebird with a Pontiac 350, and will be installing a t56 out of a 02 ss with a 1st gear 2.66 and my rear is 4.10. So my question is lightweight aluminum 15lb or steel 30 lb? or is ther something in between.

JustinB
05-20-2011, 10:20 AM
For street cars, I always run a SFI rated steel flywheel.

Flash68
05-20-2011, 10:37 AM
Depends on your intended usage, but I've daily driven an alum LWFW and loved it. And that's in a hilly city.

nicks67camaro
05-20-2011, 12:00 PM
My experience with the 30lb flywheel and the t56+4.10 combo was it is notably slower reving. I have a 18lb flywheel now and love it. it is very streetable even with my higher RPM engine.

chicane67
05-20-2011, 07:58 PM
I'm a fan of light weight alloy myself...

NJSPEEDER
05-21-2011, 12:05 PM
I have had an aluminum flywheel in my Camaro for years and even with a very aggressive clutch it is great to drive. Just get one from a name brand, not some cheap eBay stuff. Any reputable brand will be SFI rated.

-Tim

rechin23
05-21-2011, 01:13 PM
Thanks for your reply guys. Any recomendation as to weight. 15/18/25? and typically I understand Pontiac mototrs dont do well with the high revs, is that a myth>

Vegas69
05-21-2011, 01:31 PM
I want to swap my steel for aluminum. Mainly for rpm matching and quicker revs. Of course I have a big block with 641 ftlbs and can take off in 2nd without much trouble.

chicane67
05-21-2011, 04:18 PM
Around 15 is typical for SBC applications and a single disk.

NJSPEEDER
05-21-2011, 04:47 PM
Thanks for your reply guys. Any recomendation as to weight. 15/18/25? and typically I understand Pontiac mototrs dont do well with the high revs, is that a myth>

Do you know who you are going to be buying your clutch from? They should be able to tell you or more than likely sell you the right piece.

-Tim

rechin23
05-21-2011, 08:27 PM
I havent decided on the clutch yet, I figured I would ask here first about the flywheel.

The WidowMaker
05-22-2011, 06:44 PM
my mcleod billet steel is 24lbs, and thats .200 thicker than their normal ls flywheel. not sure what a pontiac fw would weigh from them. the aluminum one that i returned was 14-16lbs and it was .200 thicker as well. i will be running 3.73s, 2.66, 3900ish lbs and a 28.5 tall tire. i could go back to the aluminum, but im not sure it will be enough.

Vegas69
05-22-2011, 08:43 PM
Tim, I think you are making a good choice. Heavy, tall first, and tall rear tire.