Vibrations... perhaps an easy answer?

[mr_woodster]

I did some searching and think I've found my problem.
I have some pretty serious vibrations in park (havent driven it much, Rest of the car is still a work in progress)

My setup is a 66 coupe with a 95 efi 5.0 in it.

the car originally was a 289, that was swapped to a 73' 302. I believe it still has the original C4 transmission/flexplate.

My question is, what weight flexplate do i need to have a proper balance while retaining the C4 trans? It has the proper year harmonic balancer for the year motor.

Thanks for your help, a quick search sure helped narrow this down !

 

[Fast63]

aahhhh, should be 50 oz. flexplate and 50 oz harmonic balancer for your 95 EFI engine. If you have the 50 oz balancer but a 28 oz flexplate, which would have come in the 66 289 and the 73 302, that is your vibration problem.

 

[D.Hearne]

You need a 157 tooth 50 oz/in flexplate. And the 50 oz balancer to match

 

[mr_woodster]

Thanks guys, i will look for one of these 50oz flexplates, i believe that is my problem!

 

[daddy oth]

replaced your flexplate with a 50 oz. and problem solve

 

[D.Hearne]

Just don't bother looking in the junkyard for one. There was no stock application for this one. Aftermarket only item. B&M, Ford Racing and others sell this one.

 

[BarnStang]

Or you can have a reputable machine shop rebalance yours...emphisis on reputable. But check the cost first, it may be cheaper to just order a new one.