Ok here it is ....I have about 12 intial on the engine at idle with the vac cannister disconnected....I bring the engine up to 3000 rpm with the can still disconnected I get 22 degrees advance and finally reconnect the vac to the can and I get another 12 degrees for a total of 34 degrees.The engine seems to like this setting in nuetral in the drive way.
My question is the distributor was set up before a similar engine.....from these numbers it looks to me that the distributor is set up for about 16 degrees intial timing on the engine to get to close to 45 to 50 accumalative timing at part throttle or cruise.???????????