How many degrees does the spark advance?
 

I have a couple of questions.

1.- Does anybody knows how many degrees does the leading spark advance BTDC at high rpm, before the turbo start pumping presure to the engine 13B 93.
and
2.-
How many degrees advance for 15 psi . For leading and Trailing?
Thank you.

Attached is the stock USA map for the Apexi PFC ecu for the FD.

Look at the IGT(igntion leading) map for leading plug timing.

Can you help me just a bit in reading that map?

What values are the scales in X and Y, and are the numbers in the ignition table actual degrees, or values I can use to find degrees?

Thanks!

The columns are each 400 rpms. Thus column 5 is (5 * 400) = 2000 rpm. Column 20 is 8000 rpm.

The rows are vacuum/boost values. Row 4 is will most engines will show for idle. Row 10 is 0 psi vacuum/boost. Row 20 is about 19.4 psi boost. Due to internal coding or error most PFCs show row 17 when the boost is in the 12s range. Mathematically, row 18 should be for 12s boost and row 17 should be for 10s. Go to the PFC forum to get the PFC manual.

At idle the timing values in the cells are not what the PFC shows on the monitor. Some Mazda conversion takes place plus the PFC can alter timing for the most smooth idle and idle speed control. Above idle and on boost the monitor seems to show the same as the cells. This has not been verified yet for all conditions but seems to be true.