Don, another question. Just curious to know how it works

[Luke]

Serial # 1b785368
As stated in one of the other threads i have here, this is the first Opti I have had so I am trying to learn.
My EFI did not have an Air Compressor but the Opti does.
Can you explain what and why reason for the opti and what exactly it does for the motor?
Again just trying to learn

[lpugh]

Primary reason was to reduce emissions, as result they run cleaner, have far better throttle response and at least 30% better fuel economy. The air compressor pumps air into the fuel rails air chambers, the fuel injectors deliver fuel to the air chambers and then the air injectors spray that atomized mixture directly into a cavity in the center of the piston. This is the short version as it is a well-designed system that is quite complicated

[JOE54]

standard 2 strk mtrs use a homogenized / mixed fuel air charge to cyl via injection carbs through front of engine very inefficient / dirty ........ optimax engines use a stratified fuel charge that uses air psi to help atomize fuel and inject this mixture under high psi very precisely into the cyl resulting in a much more if not complete combustion this system as LEON said is complex but very very clean in emissions and much more fuel efficient ,,,,,,, im not DON bet he will agree

[Another Distraction]

So Don's 150:1 oil in the fuel tank lubricates both the fuel and air injector? Nice.

[EuropeanAM]

It does- though it's really the Direct injector that benefits the most from it.

Definitely a very efficient setup when working as it's supposed to. BUT... there's a lot of things going on that have to be "just right" to make it that efficient.

I usually see about 2 "new" things a decade that I personally think are "impressive". The Optimax DFI system was one of those things (way back in the 90's).

[JOE54]

So Don's 150:1 oil in the fuel tank lubricates both the fuel and air injector? Nice.

and 2 fuel pumps , plus cleans from tank to prop hub