Originally Posted by Icelander
Hi, i have a chevy 383, 10,5 compression, iron heads with 200cc intake ports, and the cam is comp 280 magnum, 230@0,50 and 480 lift, and HEI ignition. when it idles best the timing is 18 degree and that is at 900-1000 rpm and the total is 38 degree, OK i was told that these are fair and normal figures but it punches the living hell out of the starter when im cranking her up, OK i can buy me self a high torque mini starter but wont he get the same punishment as this one ? And another thing it seems like the engine performs better with the vacuum advance blinded ?! this cam can barely be used with power brakes, OK can be fixed with a canister but will that somehow help the vacuum advance on the distributor ? Hmmm ? HELP please ?
Thanks in advance. Kristofer.
I have a 383 with a XE274 cam 230* intake, 236* exhaust, 10.36 static CR running on 89 octane pump gas.
I set my timing to 34* all in by 2600 rpm. I have 13" vacuum at idle and am using a vacuum can per Lars' specs.
Absolutly no problems cranking, either with stock starter or smaller high torque.
BTW, I don't know what initial timing is, it does not matter.