naa distributor

2island · Feb 28, 2009

I installed a new distributor in my naa and now i cant get it timed right. when i time it at 8 degrees for low rpm, and run engine at full rpm, the timing advances to about 20 degrees instead of 31. When i time for full rpm (31 degrees) and bring to low rpm it goes to about 15-20 degrees instead of 8. My old distributor has 2 springs on the cam and weight assy. and the new one has 3.
Would it help to remove 1 spring on each weight?

JMOR · Mar 1, 2009

(quoted from post at 18:14:28 02/28/09) I installed a new distributor in my naa and now i cant get it timed right. when i time it at 8 degrees for low rpm, and run engine at full rpm, the timing advances to about 20 degrees instead of 31. When i time for full rpm (31 degrees) and bring to low rpm it goes to about 15-20 degrees instead of 8. My old distributor has 2 springs on the cam and weight assy. and the new one has 3.
Would it help to remove 1 spring on each weight?

I passed over your question on 2/28, but since no one answered by today, here are my thoughts. Spring strength (number) combined with weight of weights primarily determine the rpm at which the weights move out and advance the cam & rotor. The mechanics of the weights and the slot length for the pins determine the extent or magnitude of that advance. On the other hand, if the springs are so strong that you never achieve enough rpm to overcome them& allow full travel of pins in slots, then yes, removal of a spring might get you more advance.

Dave in MS · Mar 1, 2009

Ditto what JMOR said. You could also locate an old shop that has a Sun Distributor Test Machine, and have the advance curve set to proper limits.

naa distributor

2island

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JMOR

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Dave in MS

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