Impulse Magneto for startup
My problem is that my engine was delivered with a non-impulse coupled magneto on the left. So I would need to use the PMag on the right for startup.
However other posts have stated that the PMag will do a better job than the magneto for starting the engine:
https://vansairforce.com/community/showthread.php?t=153320
A couple of quotes from that thread:
“ If you decide to install 1, please remove the impulse as it will do nothing to assist in the starting process as the P-Mag will provide impeccable starting on its own, and you can use auto plugs with it saving even more money.”
“ The P-Mag is producing max joules at the correct timing point irrespective of engine rotation speed. It can also be set up to pause to allow a couple of blades to pass so that any unburnt fuel in the inlet manifold is ingested and prevents induction fires from a backfire or indeed, prevents a starter kickback which will damage a lightweight starter.”
“ My setup with easy starts hot or cold.
* P-Mag on right
* Non-impulse mag on left
* Fine wire plugs on top (not a lot of clearance with a plenum)
* Auto plugs on bottom
* Toggle switches for mag control/grounding
* Circuit breaker for occasional testing of the P-Mag alternator
* Left side wired during build for second P-Mag or other EI (undecided)
* Push button from Steinair for starting
* No backup alternator or battery but planning for backup alt on the vac pump pad.
__________________
Ray”
In your case if you don’t want to take advantage of the PMag for starting, you could wire the ACS normally with the jumper on the “R” terminal so the PMag would be disabled and then the impulse coupled magneto would do the starting.
What is for sure is that you should not use both at the same time and that a non-impulse coupled magneto cannot start the engine by itself.
Hope this helps!
Leonard Westermeyer