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Old 08-21-2005, 05:20   #1 (permalink)
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would wsitching the felx after balancing be a problem

the engine builder has balanced my 351 using a 302 flex plate, its 157tooth and I needed the bigger one, its a 28oz flex plate.

Will changing it over to a 16? tooth 28ox flex muck up the balance, i would think it will to some degree?

The situ is 351W using c9/10 bellhousing/351W starter.
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Old 08-21-2005, 09:19   #2 (permalink)
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Re: would wsitching the felx after balancing be a problem

For sure, as soon as you even move the flex around one bolt hole the balance is effectively ruined. The motor will be balanced for the whole rotating assembly (rods, pistons, crank, harmonic balancer and flexplate/flywheel and clutch). They usually mark your flex with a dot corresponding to a mark on the crank. All of this really means shit, as the factory balance was no where near as good as the balance work you have had done. You probably wouldnt feel it, it would probably be better than the old motor you drove. But saying that in a worse case you may feel a vibe if you're really looking for it. If you are really worried take it back in, its only money!!
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Old 08-22-2005, 02:56   #3 (permalink)
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Re: would wsitching the felx after balancing be a problem

all sorted now, thanks
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Old 08-22-2005, 05:25   #4 (permalink)
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Re: would wsitching the felx after balancing be a problem

aren't the flexplates for ford motors drilled so that they can only be fitted in one position
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Old 08-22-2005, 06:50   #5 (permalink)
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Re: would wsitching the felx after balancing be a problem

You take your flexplate in to a machine shop and they get get the balancing off it to put on your new one.
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Old 08-22-2005, 07:51   #6 (permalink)
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Re: would wsitching the felx after balancing be a problem

Quote:
Originally Posted by RevHeadRon
aren't the flexplates for ford motors drilled so that they can only be fitted in one position
Yes.


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Old 08-23-2005, 02:12   #7 (permalink)
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Re: would wsitching the felx after balancing be a problem

Quote:
Originally Posted by crochunter
You take your flexplate in to a machine shop and they get get the balancing off it to put on your new one.
thats exactly what they are doing.
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