[67drake]

Hi guys,
I had my car at the track the other night,first time out since the 400 was rebuilt. I made a few passes,then increased my initial timing from 12 to 14,then from 14 to 16. Each increase my MPH went up,around 92 MPH at 12,96 to 97 while at 16 degrees.
Ok,now today while driving on the street,it lugs and bucks slightly while cruising in 4th (Muncie 4-speed tranny). My engine builder had put one of those Crane dist. curve/adjustable vacuum advance kits in the distributor when he had the engine. Silver springs installed ,I believe. Advance connected to manifold source currently. This is a stock breaker point distributor ,BTW
OK,logic would tell me that the engine wants less timing at cruise,seeing how it ran good at 12 initial while street cruising before. So now I should adjust vacuum advance to take advance out at cruise,right?
Also,how much initial can I give it? I was tempted to go another 2 degrees advance at the track,and see if MPH increased,but I'm afraid I would not hear the detonation if it started.
I would like to check cetrifugal advance also,so I did buy a dial back timing light,just have to wait for it to arrive.
I have never really played with these curves before,so it's all new to me.I just want to make sure I'm doing the right thing here?
Thanks,Drake