GM points distributor
Posted: Tue Aug 22, 2023 10:43 amThis question is for Geoff or any one else who can contribute.
Recently I have had a few guys bring their classic cars to me with bigger than stock camshafts that want to retain the points distributor look .
So the distributor needs to be recurved to add initial timing for the lumpy cam which requires shortening the mechanical advance.
These old distributors have a pin in the slot which limits mechanical advance. This pin almost always had a bushing made of rubber or nylon. The slot was different depending on OEM requirements for a particular engine.
You can change the bushing size on the pin somewhat to adjust total mechanical . This may also change the starting point of the advance.
Another camp as Tuner has wrote about is to reconfigure the weights by heating and recurving the weight . Picture below.
The question is . What do you guys recommend to limit the total advance?
Recently I have had a few guys bring their classic cars to me with bigger than stock camshafts that want to retain the points distributor look .
So the distributor needs to be recurved to add initial timing for the lumpy cam which requires shortening the mechanical advance.
These old distributors have a pin in the slot which limits mechanical advance. This pin almost always had a bushing made of rubber or nylon. The slot was different depending on OEM requirements for a particular engine.
You can change the bushing size on the pin somewhat to adjust total mechanical . This may also change the starting point of the advance.
Another camp as Tuner has wrote about is to reconfigure the weights by heating and recurving the weight . Picture below.
The question is . What do you guys recommend to limit the total advance?