Platinum69

Hi, can anyone tell me the approx. Timing on my 73 350 olds with #5 heads, .472 lift crane cam, eldebrock performer, carb spacer 1", 600cfm holley, everthing else stock. Thanks

oldcutlass

Read these, I know its for a Chevy but Olds engines work basically the same way other than our dist turn CCW :
http://www.corvette-restoration.com/...ine_Timing.pdf

http://www.metroli.org/pdf/WHITE%20P...0Operation.pdf

olds 307 and 403

I have found Olds, the low compression version, assuming your motor is around 8.5 to 1 with Felpro replacement head gaskets, like a lot of part throttle timing. If it is the points distributor, run around 14 base and 22 with the HEI. Also run full vacuum advance off the manifold. You can try one of the advance kits, I always use their lighter springs with the stock weights.

joe_padavano

The short answer is no. The correct initial timing for your motor depends on the application, the fuel you are using, the amount of carbon buildup in the chambers, the jetting, the gears, the altitude, the trans, the specific settings in the distributor, the exact CR in the motor, the exact valve event timing, etc, etc. The car knows far better than any of us what it wants for initial timing. Keep advancing the initial timing until the engine pings under acceleration then back off a degree or two.