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Discussion Starter #1
I have a 1970 GTO with a 400 engine. It is basically stock. Standard distributor except I added Petronics to replace the points. Base timing is set at 9 degrees per the manual. At 2500 RPM it is only advancing by 14 degrees for a total advance of 23 degrees Is this correct or should it be higher?
 

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You should be closer to 36 degrees all in at that rpm. What springs are you using for your advance? Also, is there any pinging/detonation? What octane are you running on this original engine?
 

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Discussion Starter #3
No ping. I am running premium non ethanol gas. I do not which springs I am using. was going to look this weekend. It was originally an auto that I converted to a Tremec 5 speed. I also thought it should be closer to 36 degrees but was not sure.


Thanks for the input.
 
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