Devil’s Advocate

[Hugues]

Precious info in this document
I don't know if Jim still sells his Pinz intake
https://www.goatwerks.com/images/fuel%2 ... ctions.pdf

[eric1355]

Hello
another nice injection assembly
with 4 Lamda probes to control AFR cylinder by cylinder
because our air-cooled engines
do not have the same cooling/performance on cylinders 1 to 4.

another wonderful turbo injection realization:
https://www.facebook.com/groups/2355826 ... 587468583/
https://www.facebook.com/groups/2355826 ... 697763583/


Eric

[rollingpinz]

So I’ve gone through Jim’s instructions and I have a couple of questions.
Does the original fuel pump get removed or does it do the lifting for the electric pump?
I’ve always been curious about the plenum with the injectors on top. It looks like the injectors fill the plenum with fuel vapor and the cylinders draw what they like. Like fuel from injector #1 can be drawn into cylinder #3. Or does the injector shoot the fuel down across the plenum directly into the manifold below?

[Hugues]

Good questions.
I don't know as I did not buy it in the end.

[rmel]

My 710K has prototype #1 of that injection system. To answer a few questions,
the mechanical fuel pump is eliminated and replaced with a high pressure
return-flow fuel system, typically set to 40PSI. The pump must be placed as
low as possible to the fuel tank. This type of pump does not operate well if
there is any siphoning.

The injectors are aligned relatively close to the throats of the intake, however
the injectors typically are operated in batch mode -- all firing at once with no
regard to cycle. Trigger can be simply points or an RPM output.

The plenum acts as a source of atomized vapor.