I'm new to having a motor with an aggressive cam and have a couple of things happening with my freshly rebuilt motor that I can't figure out.
1) To get the car to idle on it's own I have to advance it pretty far. When I put the timing light on it, I have to set the timing so far advanced that the indicator on the harmonic balancer is pointing to a position about a half inch to the left of the timing cover. I'm thinking maybe the cam was put in a tooth off? Here's a twist though, I have a 68 timing cover on the 73 motor and I don't know if the covers are so different that the timing would show that far off.
2) This maybe related to issue number one but, when the car is stone cold, it will turn over fast and start right up. After about a minute or so, if I shut it off and turn it over to start it again, it turns over slow. The temp gauge shows less than a 100 degrees so I know it's not too hot. The starter might be getting hot though since it's right next to the headers, but could it heat up that fast?
Here is some specific points about the motor: 1) 73 455 bored .10 over, 6X rebuilt heads, Weiend intake, rebuilt Holly 650, headers, compression - aprox 9.5., mechanical advance dist. 2) Run time so far is about 30 minutes 3) The cam is aggressive (I don't have the specs, but it has a good lop during idle) 4) Oil pressure is good (about 60 psi.) 5) It runs great during acceleration and if I hold it at 2500-3000 RPM its a little more rough running than a standard cam.
