Type 4 megasquirt Options

[r_towle]

I am looking for a roll call with details on any type 4 EFI people.

hope we can keep this thread on track.

Please tell us

What size motor
What EFI brain are you using
What throttle body setup do you have
What size injectors are you using

ignition?
And any data logging?

[FourBlades]

Some pictures of my EFI setup. Mine uses electromotive for the ECU but most of the
stuff is the same as you would use for megasquirt. I think the electromotive uses a
different number of teeth on its trigger wheel.

Here is what the CB Performance throttle bodies look like with their fuel rails,
injectors, and the metal tab that holds the fuel rails to the throttle body.

The tube coming out from the between the manifolds is an air line that goes to the
manifold pressure sensor in the rear trunk. The throttle bodies are drilled and
tapped for this air line and the lines from both throttle bodies join together before
going to the manifold pressure sensor. These long air lines help smooth the air
pressure pulses at low RPM but they still fluctuate a lot below something like 2500
RPM. Below 2500 RPM (or so) the electromotive relies on the throttle position
sensor mounted to the back of one throttle body for its load input. It can blend
between the two to smooth things out at low RPM. Not sure what megasquirt does
here but I bet it is something similar.



Here is a close up of the metal tab holding the fuel rail to the throttle body. I had a
hard time getting pictures of this stuff with the engine installed. (IMG:style_emoticons/default/smile.gif)



Another shot of the tab.



A shot of the master side of the tangerine throttle pulley system. Edit: I had this
backwards I realized: At the top of the wheel is the throttle cable attached to the
gas pedal. At the bottom is the cable to the slave wheel on the other throttle body.



Hope this helps.

John

[ChrisFoley]

A shot of the master side of the tangerine throttle pulley system. Edit: I had this
backwards I realized: At the top of the wheel is the throttle cable attached to the
gas pedal. At the bottom is the cable to the slave wheel on the other throttle body.



Hope this helps.

John

John,
The throttle shaft on those throttle bodies is higher than on a Weber carb. That means there is a slight angle to the cables where they enter the sheath, which could cause some binding on throttle return.
You might want to raise the cable support brackets where they attach at the base - to straighten the cables.
I see that the studs are too short as is so you would have to install longer studs to accomplish this.

/hijack