425 Harmonic Balancer
#3
#8
Don't know about different balance on later motors, but any 65-67 V8 balancer will work on a 425. The 64 330 motors have a different timing mark location due to the driver's side water pump inlet. Of course, if you are going to degree the balancer for your motor, then just scribe a new line in the correct location.
#10
News to me. The flexplates are the same for all 64-67 motors. I can't imagine that you'd put all the balance mass at one end of the crank - that would set up torsional vibrations in the crank. Note that Fluidamper, ATI, and TCI all show the same balancers as fitting all Olds motors without mention of any removable weight. The Professional Products balancer claims to have a removable weight if you want to use it in an internal balance configuration, but that's a custom build.
#11
News to me. The flexplates are the same for all 64-67 motors. I can't imagine that you'd put all the balance mass at one end of the crank - that would set up torsional vibrations in the crank. Note that Fluidamper, ATI, and TCI all show the same balancers as fitting all Olds motors without mention of any removable weight. The Professional Products balancer claims to have a removable weight if you want to use it in an internal balance configuration, but that's a custom build.
Like I said I remember seeing a balancer (not a P.P.) with removable weight for an Olds and thought it was for the early engines 64-7.
On here it says by allthe balancers that early 400/425 must be rebalanced to use the regular balancers
http://www.mondellotwister.com/Crankshafts.htm
#12
I doubt any of them are still in balance after 40 years. As long as they absorb the shockwaves, and your bearing clearances are ok I wouldn't sweat it. If you are going the performance route, than get a nice Pro-Race or something.
#13
I wouldn't use a professional products one if it was free.
Like I said I remember seeing a balancer (not a P.P.) with removable weight for an Olds and thought it was for the early engines 64-7.
On here it says by allthe balancers that early 400/425 must be rebalanced to use the regular balancers
http://www.mondellotwister.com/Crankshafts.htm
Like I said I remember seeing a balancer (not a P.P.) with removable weight for an Olds and thought it was for the early engines 64-7.
On here it says by allthe balancers that early 400/425 must be rebalanced to use the regular balancers
http://www.mondellotwister.com/Crankshafts.htm
#14
Uh-oh there ya go reading Mondello gunk again. None of the 330 cranks I ever had needed to have the timing marks re-done. Maybe I never had a 64 (early) one like Joe said. Having to rebalance the 400-425s were not explained either. I'm afraid I'll need more explanation than that little foot note.
64 330 were different for timing marks, because of the opposite side w/p probably.
#15
Uh-oh there ya go reading Mondello gunk again. None of the 330 cranks I ever had needed to have the timing marks re-done. Maybe I never had a 64 (early) one like Joe said. Having to rebalance the 400-425s were not explained either. I'm afraid I'll need more explanation than that little foot note.
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ForestMist66
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October 15th, 2012 03:22 AM