Bill, confirm please. Assume an owner or mechanic does not use the EICAD program, and does not have an EI Commander. Further assume the owner or mechanic sets timing using the TDC mark per the manual.
No jumper; what are the base and max timing values?
With jumper; what are the base and max timing values?
Dan, your comment about a mechanic who is not familiar with the P-mags is exactly why I recommend they get set to the proper configuration with either our EICommander or the EICAD program from Emag.
A couple of things first, all the numbers I am going to present assumes the P-mags are set to TDC.
Startup Mode: Below 400 RPM's the P-mags fire at 4.2 degrees past Top Dead Center (TDC) for Version 40 and above. Pre version 40 fires at TDC, which has caused some kickbacks, damaging starters and starter rings. Get your P-mags in for the upgrade & inspection, if you are pre version 40!
Low Power Idle: Regardless of the settings, at low RPM's, the P-mags will move the timing to closer to TDC to help with the idle, 19.6 degrees in some cases. As soon as power is applied, the P-mags will move to the max power setting.
"A" Curve (Jumper In):
High Power / Takeoff setting: 26.6 degrees
Max Advance: 35.0 degrees (The P-mags advance 1.4 degrees past the Max Advance setting.)
"B" Curve (No Jumper):
High Power / Takeoff setting: 30.8 degrees
Max Advance: 39.2 degrees (The P-mags advance 1.4 degrees past the Max Advance setting.)
Customer configurations:
It is difficult to recommend a setting as it seems every engine is slightly different. When creating a custom configuration with the EICAD program or using an EICommander, no jumper is used.
The following are configurations that our EICommander customers have had good luck with:
Stock Parallel 8.5:1 compression engines (Either 320 or 360):
High Power / Takeoff setting: 25.2 degrees (Advance Shift: -1.4)
Max Advance: 30.8 degrees (Max Advance: 29.4)
Stock Angle Valve (Either 360 or 390):
High Power / Takeoff setting: 19.6 degrees (Advance Shift: -7.0)
Max Advance: 29.4 degrees (Max Advance: 28.0)
If any of you have any questions, feel free to email or call.
bill (at) repucci (dot) com
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