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Flywheel to dyno engine

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BIG BLOCK FORD :: GENERAL TECH :: GENERAL DISCUSSION

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Flywheel to dyno engine Empty Flywheel to dyno engine

Post  Tore October 31st 2013, 8:58 am

I am going to dyno an engine and need an internally balanced flywheel. Will a flywheel from a 352/390 bolt up to my 460 crank and work?


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Post  Curt October 31st 2013, 10:18 am

Aren't all 460 flexplates neutral balance?
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Post  Tore October 31st 2013, 10:22 am

Most are I believe but I don't have one. But I have a friend with one from a 390 I believe.



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Post  dfree383 October 31st 2013, 10:51 am

yes a 390 / 427 flywheel will work on the dyno just make sure it's a steel sfi rated one.

Can't use a 428 one they are external
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Post  bigblockfox468 October 31st 2013, 11:21 am

Mmmmmmm... brings back old memories of using a flex plate instead of a flywheel coupled to a dyno Shocked pale
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Post  Tore October 31st 2013, 11:44 am

They found one that they used before. Called an old customer.


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Post  dfree383 October 31st 2013, 12:55 pm

bigblockfox468 wrote:Mmmmmmm... brings back old memories of using a flex plate instead of a flywheel coupled to a dyno Shocked pale
That wasn't a smart thing to do.affraid 
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Post  QtrWarrior October 31st 2013, 7:26 pm

bigblockfox468 wrote:Mmmmmmm... brings back old memories of using a flex plate instead of a flywheel coupled to a dyno Shocked pale
Seems like I remember that....
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Post  IDT-572 October 31st 2013, 11:51 pm

QtrWarrior wrote:
bigblockfox468 wrote:Mmmmmmm... brings back old memories of using a flex plate instead of a flywheel coupled to a dyno Shocked pale
Seems like I remember that....
Just remember ole Snake was dead set against that deal...................Twisted Evil  Got out voted ! ! !
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Post  bigblockfox468 November 1st 2013, 6:18 am

IDT-572 wrote:
Just remember ole Snake was dead set against that deal...................Twisted Evil  Got out voted ! ! !
I know Bud...it was my first session and I didn't have a clue what was going on. It all turned out good afterwards. But the question is.... how much hp will three 3/8 bolts hold up too? scratch 

Didn't mean to hi-jack your thread Tore Arrow
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Post  lghting94 November 1st 2013, 9:42 am

Can someone explain to me why a flexplate is a bad idea? I would think if it were an sfi approved plate and the proper balance it wouldn't be any different than the flywheel other than weight. On the dyno I go to the dyno driveshaft is bolted to an adapter that is bolted to the rear of the crankshaft and the flywheel/flexplate is sandwiched between the adapter and the crankshaft?
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Post  dfree383 November 1st 2013, 11:54 am

The mount on the dyno is a flat plate and it needs a flat surface to mount to.

And 3 bolts is not a safe number when you start upping the hp and torque.
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