bcarpman

Anyone have a sample spark table from an HP500?

I don't really care what vintage, I'm just curious as to how Merc calibrated spark: how much advance at part throttle, etc.

thanks

Griff

Carbed 500's used a 20* advance module with full advance at 3000rpms. Pretty much 1* of advance every 100rpms until full advance at 3000rpms.

Just saw you're asking about the 500efi's. I'm not sure of the exact advance on them. Its more complex and uses the knock sensor as well to retard timing.

bcarpman

Thanks griff, but that's really what I'm looking for. A lot can be gained at part throttle with computer controlled ignition timing, but I'm not going to spend a couple weeks on the dyno figuring it out.

No one??