power fc ignition timing

[tyra skyline]

if my standard timing on the crank angle sensor is at 20degrees advance and the values in the timing map in the power fc max 45 degrees what is the total timing,? is the 20degrees advance at the crank add to the 45 degrees in the power fc to give you the actual max timing.

[djr81]

45 degrees.

Assuming your timing sensor on the exhaust cam is set on the correct 20 BTDC mark the power FC timing will read total degrees BTDC, ie when it says 45 degrees it means 45 degrees.

[cameron]

Just watch the Knock level, Standard timing is 15º BTDC as read on the Harmonic Balencer with a Timing light.

[pnblight]

yes your std timing is 20deg at idle i think around 950rpm and when you set it make sure the pfc is reading 20 deg as it should do at idle , then the map read will directly represent the actual timing 20deg = 20deg ,45deg = 45deg etc

does this answer your question

pete

[tyra skyline]

if i want to run 1.3 bar booste, what timing should i run, should i retard timing from the cas , and then advance it from the power fc

[Sydneykid]

if i want to run 1.3 bar booste, what timing should i run, should i retard timing from the cas  , and then advance it from the power fc

Personally I always set the base timing at 20 degrees using the CAS, then adjust the ignition maps accordingly. If you want to test a straight line change (at all load points) then you can do it with the master ignition timing. Noting that it will revert back when you turn the ignition off.