V8 base ignition timing adjustment

[grnvs]

I had my base ignition timing adjusted today. My car has a stage 3 crow cam with crow chip and stock internals.

Apparently it was orignally set at 20 degree's advance. But i thought this seemed a little odd since it is a non hsv engine (no knock sensor) and it didnt ping, even if i reved it full throttle right up to redline.

They reset the timing back to 10 degree's, but i was wondering, could it be possilbe that the timing was being read and adjusted NOT in diagnostic mode? Or is it possible for an engine with a cam of that size and low compression to be able to run 20 degree's advance and not ping? 20 degree's advance just seems a little odd considering it was driving fine and wasnt pinging.

 

[383 hatch]

How does it feel on the road? If it was running 20 degrees base timing and not pinging and now it's back to 10, I'd imagine it would be pretty sluggish. Anyway, considering the low compression of a 5 litre and now you will be loosing even more comp with that cam, 20 degrees would be quiet possible without it pinging.

 

[grnvs]

It idles better now, but hard to tell if its more sluggish, because it only goes hard up top with the cam, doesnt have much low down touque.

 

[grnvs]

It was done in diagnostic mode, i checked it. I think i might run a bit more advance maybe 14 degrees since it didnt really have any issues with 20 degrees

 

[vyjess]

check your total timing thats more important