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Old 09-05-2012, 11:00 PM
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slight viabration with my motor (302)

I just instaled a newley rebilt 302 with a AOD tranny and I am fealing a slight viabration. The 302 is the early model with only 3 bolts for the pully. The AOD and motor came together in the deal also with a flywheel marked AOD on it so I trust it is correct. I belive the early model is about a 23 oz balincer and the flywheel I rembured had a small weight on it . I thought i just needed to tune the motor but I checked the timing and it is at 6* idle and 26 at 3200 so 32 total timing. all the plugs are good and the wires are in the corerect order . Any ideas?? Also the viobration is thruout the rpm and even when I am driving.
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Old 09-06-2012, 01:46 AM
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The 289's and 302's had a 28 oz balance factor, in 1980 when the AOD came out the 302 aka 5.0 changed to a 50oz balance factor if you have a 28 oz balancer and a 50oz flexplate or vice versa you will have a vibration which will cause severe engine damage.To use an AOD with an earlier 302 you need this:KMJ Performance :: Transmissions & Components :: Flexplates, Flywheels & Balance Plates :: Flexplates :: Ford SFI Flexplate 164 Tooth 28 oz - 289 302 351 C4 AO The 260/289/302's that used a 3 bolt balancer were 1969 and earlier only exception was some 70's Ford vans also used it,as a footnote the 351W is also a 28 oz balance factor.
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Old 09-06-2012, 08:58 AM
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cut some of the balance weight of the drive plate,useing your old one as a sample,if you have a postal scale weigh the removed part,i would not do this to a engine that is hp and run at high rpm.did this to a stocker 3years ago still running
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Old 09-06-2012, 11:50 AM
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I have also seen the outer ring of the harmonic balancer spin, causing the engine to become unbalanced. Had this happen on a 1993 GT Mustang 302. You might check that out as well.
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Old 09-07-2012, 11:25 AM
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front dampner 302

the weighted portion can not slip,the outer can but will not effect ballance,only timeing mark.cliff
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Old 09-07-2012, 05:06 PM
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Check this out!

Check this out, I think it is in the carb it is a edelbrock and it is new out of the box but it was on my shelf for two years. Any way I checked all the wires and each do have spark (new MSD box and distriburor also wires) everything looks good. I took it for a drive and the darn thing cleard up runs much better. I think the carb got some junk in it and thin it cleaned itself out. But now it has a ruffer than I like idle. I am not so good at carbs any idea of what I can do for the carb tune up?
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Old 09-09-2012, 01:57 PM
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Quote:
Originally Posted by cliff tate View Post
the weighted portion can not slip,the outer can but will not effect ballance,only timeing mark.cliff
Beg to differ. The outer ring on the 93 Mustang 302 is the balance part with the timing mark. If it slips, it's out of balance.
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