Paul,

This week I will sand blast a housing, and fill the outside depression
around the oil injection location with DEVCON Aluminum epoxy.

Thursday afternoon has become my access day for  Michiwa's school
machine workshop and I will be boring the housings and making the
aluminum inserts then.

Pictured below are two types of injector cylinder housings, both with
upper and lower 0-rings.  The design on the left has a M-20 thread on
the top part though it isn't shown, and although it takes up less real
estate I have decided to go with Lynn Hannover's design suggestion.
Why?  O-rings tend to deform or fold when they are twisted several
revolutions while being pushed axially as well.

I'll pressure test the housings with some glycol/water mix in the cavity
to confirm it works.

FYI the injector interface to the inner liner hole is drilled and V
shaped from the backside to allow the injector tip to insert with about
0.5mm clearance of the apex seal path.

Since I am supercharging the engine and wish to stick with MAP and
MegagSquirt ECU,  the question remains where to put the sensor or
fitting?

Two choices.  The present oil injection hole, or in the back plate on the
slide throttle?
I am concerned that the oil injection hole may accumulate fuel in it
during certain engine events, so I am leaning towards the slide throttle
location now.

Cheers


Doug in Japan

Don't forget to prepare the aluminum with an etching solution.

Question: when does megasquirt sample the manifold pressure
and is the short sample representative of the air going in the engine throughout
the RPM/tuning range? Have you studied the C source code to find out?

What are you going to use for a throttle position sensor?

The O2 sensor will fail if you use 100LL.
How important is the O2 sensor to proper operation?


Paul Lamar