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Old 11-21-2010, 07:38 PM
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Delta 88 (chevy 350)

I have a problem. I have a delta 88 with a chevy 350 bored .60 over. I had a guy put the flywheel on and come to find out later he put it on backwards. So i went and got a new one and got a heavy duty one instead of the stock one. Now it vibrates when you get up to bout 60 and it never did that before. Could the heavy duty flywheel be whats causing that cause it didnt do it with the stock one?

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Old 11-21-2010, 07:47 PM
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Just to confirm...are you talking flywheel for a stick shift or a flexplate for an automatic??? If its a flexplate make sure you don't have one for a 400 SBC, it will have a counterweight attached to it.
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Old 11-21-2010, 07:50 PM
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bad vibe

Good point 327, maybe it's a speed limiter.
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Old 11-21-2010, 08:10 PM
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its a automatic and has no weight on it. i bought it for a 350 but like i said got a heavy duty onr instead of a stoke one and neither has a weight. but it do it when the stock one was on. i just had to replace it because my helper put it on the wrong side and it messed up the teeth on it after a while.
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Old 11-21-2010, 08:13 PM
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i meant it didnt do it with the stock one on
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Old 11-21-2010, 08:33 PM
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some engines are internally balanced and some are external. make sure you got the right flexplate for your application
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Old 11-22-2010, 12:12 AM
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Try unbolting the driveshaft from the rear end yoke, turning it 180, and bolting it back up. You had the driveshaft out to change the flywheel and it is possible for the machining tolerances on the yokes to be just enough to put you out if it is 180 different from where it was installed before.

As long as the flexplates aren't weighted different(internal vs external balance), it doesn't matter if one is heavy duty and the other was stock, it shouldn't cause a vibration.
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Old 11-22-2010, 12:59 AM
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ok i will try that thanks and i will let u know if that works
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