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Setting timing with different balancer ?

TopBanana72

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1972 Dodge 318 new rebuild. The original HB is 7.25" OD and the new one is 7.1" OD. Would this not affect the relationship to the timing marks on the timing cover? I know the groove on the HB is correct TDC at the -0- mark. I timed it by ear at first and seems to run well. It felt/sounded/performed the best to me when the mark went above the 10 degree BTDC mark at idle. I couldn't really see, but think its probably set around 15, 16 degrees initial.

How could I set the timing more accurately given the odd size of the new HB?
 
That does not seem be that much difference of a diameter on the new HB from the original HB.
Can you see that the new HB is further away from the marks on the cover timing tab vs the original ?
A picture would help.
 
If you use the timing marks on the cover it shouldn't matter. The balancer is just farther away.
But a timing tape would be a different story as now the diameter determines the spacing on the marks.
15 Degrees BTDC is not unreasonable.
Just be mindful that as you get some carbon build up in there it may start pinging after some use if the maximum advance is fairly high.
 
If you cant find a custom tape. You could make your own. 2 x pi x r /360.
2x3.14159x7.1/360 = 0.1239 inches per degree
Lay it out on a piece of paper. Transfer in the the dampener and clear coat
 
1972 Dodge 318 new rebuild. The original HB is 7.25" OD and the new one is 7.1" OD. Would this not affect the relationship to the timing marks on the timing cover? I know the groove on the HB is correct TDC at the -0- mark. I timed it by ear at first and seems to run well. It felt/sounded/performed the best to me when the mark went above the 10 degree BTDC mark at idle. I couldn't really see, but think its probably set around 15, 16 degrees initial.

How could I set the timing more accurately given the odd size of the new HB?
Can you hear?
 
Timing is timing gut feeling is you hear it. They are all around 30 BTDC at 3k.
 
How did you determine this, exactly?

I set number one cylinder on TDC compression stroke. Then I installed the balancer on the crank with the key and the groove lined up with the 0 mark right on. I assume that's the way it is designed to go..
 
I set number one cylinder on TDC compression stroke. Then I installed the balancer on the crank with the key and the groove lined up with the 0 mark right on. I assume that's the way it is designed to go..
Ears are a great thing for timing.
 
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