• Welcome aboard HomebuiltAirplanes.com, your destination for connecting with a thriving community of more than 10,000 active members, all passionate about home-built aviation. Dive into our comprehensive repository of knowledge, exchange technical insights, arrange get-togethers, and trade aircrafts/parts with like-minded enthusiasts. Unearth a wide-ranging collection of general and kit plane aviation subjects, enriched with engaging imagery, in-depth technical manuals, and rare archives.

    For a nominal fee of $99.99/year or $12.99/month, you can immerse yourself in this dynamic community and unparalleled treasure-trove of aviation knowledge.

    Embark on your journey now!

    Click Here to Become a Premium Member and Experience Homebuilt Airplanes to the Fullest!

Dual electronic ignition on single module

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Chucker

Well-Known Member
Supporting Member
Joined
Nov 1, 2013
Messages
894
Location
Prescott Valley
The normal electronic ignition system most of us use (HAPI/GPASC) has a hall effect ignition module that operates two dual-fire coils timed 180 degrees apart. The coils have 3 ohms of primary resistance. My project engine has this fixed-timing secondary ignition in conjunction with a Slick magneto. Now I am just brainstorming here... If I wanted to use the single secondary ignition module to fire all 8 spark plugs and leave the big heavy magneto home, could I replace my two coils with four 1.5 ohm dual-spark coils? I realize that I would need to develop a means of advancing and retarding the timing on the module. The question here is: Would the ignition module handle the job and would the coils function properly when paired in series (two coils for the back cylinders and two coils for the front cylinders)? I don't really need a lecture on why I should not give up the magneto and I do realize that the ignition module would be a single point of failure. I'm just looking for someone who really understands electronic ignition systems. Can I run two 1.5 ohm coils with the primary windings in series triggered by an ignition module designed for 3 ohm coils? Is there any degradation in performance or reliability?
 
Back
Top