Aluminum flywheel for externally balanced stroker BB
Thread Starter
Pro
Joined: Oct 2004
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From: Stafford VA
Aluminum flywheel for externally balanced stroker BB
The stroker crank in my 496 is sold as internally balanced but it has a throw weight on the end of the crank outside the block. Even though the weight appears a little recessed from the end of the crank, the engine dyno operator said I should look for a flywheel that's recessed a little on the back side just to be safe, he's had interference problems with other "externally balanced internally balanced" cranks before.
I want an aluminum flywheel but none of the websites show a picture of the backside. Anyone know of an aluminum flywheel that has "room" on the backside for counterweight clearance?
Thanks!
I want an aluminum flywheel but none of the websites show a picture of the backside. Anyone know of an aluminum flywheel that has "room" on the backside for counterweight clearance?
Thanks!
Race Director
Joined: Jan 2000
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From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
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Got any pics? They are either internal or external. The flywheels will physically bolt to either one...just won't be balanced properly. Shouldn't be any issues with rear side clearance.
JIM
JIM
Race Director
Joined: Jan 2000
Posts: 13,024
Likes: 2,266
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
Man...that's a BIG one!! Are you sure it's internally balanced otherwise? Is the balancer a neutral balanced one?
JIM
JIM
Thread Starter
Pro
Joined: Oct 2004
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From: Stafford VA
Balancer is neutral balanced ATI and the crank is an Eagle forged stroker that's sold as internally balanced. On the engine dyno, we used an internally balanced steel flywheel that was clearanced on the block side because the shop owner had experience with these kinds of "internally balanced" cranks before.
There is a slight recess from the end of the crank to the weighted throw but I am taking the advice of someone experienced in these matters and looking for an aluminum flywheel that has some room on the block side.
Any suggestions except to order a quality aluminum flywheel and hope for the best?
There is a slight recess from the end of the crank to the weighted throw but I am taking the advice of someone experienced in these matters and looking for an aluminum flywheel that has some room on the block side.
Any suggestions except to order a quality aluminum flywheel and hope for the best?
Race Director
Joined: Jan 2000
Posts: 13,024
Likes: 2,266
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
C2 of Year Winner (performance mods) 2019
2017 C2 of Year Finalist
I don't have any pics...but we just used a Fidanza aluminum wheel and it was pretty scalloped out on the backside. Usually the flange is out from main part of wheel...so I think you'll be fine.
Don't forget to put a pilot bearing in it!
JIM
Don't forget to put a pilot bearing in it!
JIM
Melting Slicks
Joined: Jan 2003
Posts: 2,877
Likes: 13
From: Doha
St. Jude Donor '08
Not to hi-jack the thread, but is that crank is really internally balanced? .. if it has that much of a counter weight "outside" the block, then they can't be called "internally balanced", can they?
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Thread Starter
Pro
Joined: Oct 2004
Posts: 573
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From: Stafford VA
They can call it whatever they want I guess. 
It's internally balanced because it doesn't require an externally balanced 454 flywheel. If they called it externally balanced and someone put an externally balanced 454 flywheel on it, there would be problems.
It's internally balanced because it doesn't require an externally balanced 454 flywheel. If they called it externally balanced and someone put an externally balanced 454 flywheel on it, there would be problems.
