G3 Ignition

[Fearless]

Larry must really like the system because he included a brochure of it when I received my exhaust system. I'll have to take a closer look at it for the benefits. Now would be the time to make a change as I'm working on my FWF components as well as wiring.

[akschu]

Just got off the phone with Thomas. Very smart guy with a clever idea.

The system is basically a mag bypass. When it's on, it prevents the mag from firing itself and routes the pickup to the MSD box and then routes the coil signal back from the MSD box to the coil.

So you get MSD ignition when it's on, and mag ignition when it's off. Because it fires both mags at the same time from one pickup, your ignition is always perfectly sync'd.

The MSD box provides spark for 20* crankshaft rotation which is why it's smoother and has better idle, but this system does not add timing advance.

You can buy the MSD start retard module or MSD timing control module to change the timing if you want, but it's not an automatic timing change like other EI modules.

I like this system the best because of how it bypasses the existing mag and allows you to connect an external ignition box. It's simple and effective.

schu

[Captain_John]

Hey all, sorry for the poor cell phone pic but my camera went TU last week.

ANywhoooo... here is a pic of my G3i install:



this past week I flew down to Mattituck and ran it in their test cell. Everything was "temp'ed" up on a board that we wire tied to the test cell engine frame.

Thanks to both Thomas at G3i for answering all my stupid questions and Mahlon and all the folks at Mattituck for being so accommodating to my needs.

I was able to switch the system on and off from the test console and observe the changes in the engine's performance. I can't wait to fly behind it and see what it can and will do at altitude!

I like this installation location because it keeps all my wire runs as short as possible and maintains distance from the radios. My noise filter capacitor will likely be installed just beneath the MSD box.

Engine is being installed now and I will keep you posted!

OUT!

CJ

[Danny7]

Originally Posted by Captain_John

this past week I flew down to Mattituck and ran it in their test cell. Everything was "temp'ed" up on a board that we wire tied to the test cell engine frame.

Thanks to both Thomas at G3i for answering all my stupid questions and Mahlon and all the folks at Mattituck for being so accommodating to my needs.

I was able to switch the system on and off from the test console and observe the changes in the engine's performance. I can't wait to fly behind it and see what it can and will do at altitude!
......
CJ

not fair captain John! how about some of the details of the test cell results? is it set up for fuel flow? did it make much difference in hp??

[Mike S]

What Danny said, these are beans that need to be spilled.

[Captain_John]

Sorry guys! I guess I didn't fill you in on all the details.

Mattituck does NOT dyno each engine that gets tested in their cell. In fact, I don't even know if they HAVE a dyno. Needless to say I cannot give you a HP number. The engine is an ECi TMX IO-360 with a Superior FF Sump with factory compression. Pure and simple, kind of boring. It SHOULD produce 180 hp all day long. I think any man would agree that perhaps a couple of ponies are likely added with any EI system.

What I noticed:

• Smoother operation while in EI mode
• Fuel flow came down .5 gph when switched on but returned to previous after about 10 seconds
• Engine "jumped" when system came alive throughout all RPM ranges
• More noticeable changes at slower RPM's
• Should provide better starts
• It was fun to play with!

I do expect this to really pay off at reduced cruising RPM's at altitude and while running LOP.

I guess we will have to wait for that data and compare it to Darwin's results when we are both flying.

If there was anything I missed, ask away. I might have an answer for you.

I guess what it comes down to is any EI is better than a mag for all the same reasons. You need to make a choice based upon your needs, wants and budget.

I chose G3i because:

• G3i keeps the Slick mags
• Uses the MSD box that cars have used for decades
• Gives me 2 EI's in one box
• I like capacitive discharge systems (prior experiences)
• Price is good
• Thomas has designed a really good system for the MSD box
• The installation is simple

Can't wait to fly behind it!

CJ