Fuel Injection Fabrication - Comments

[BraneDeadX]

I wanted take some photos of what Iam trying to build from the grond up. I had a sudden spin off from my EFI - Supercharged motor, and at the last minuite came up with this simple setup.

www.redneckcustoms.gotdns.com/efi/101_0270.JPG

www.redneckcustoms.gotdns.com/efi/101_0271.JPG


What you are looking at is a normal carbrator to GX200 series motor intake port, I I machined up a fuel injector boss that can easily be welded (now) to the intake manifold. My first attempts were little bit more something eles.

I then took the throttle body I made and bolted it to the manifold, it came out look nice, not as heavy as I thought it would be, the hole bore from TB, to the manifold flange is 1.080".

I wish I had something to test this on, its nearly a ready to go package :P hehe.

Next I need rebuild the superchargers exit port flange and what not.


www.redneckcustoms.gotdns.com/efi/101_0276.JPG

Another shot of the "NEW" intake manifold (thicker walls, easy weld)

[spacecoastz]

Have you considered motorcycle throttle bodies? Injector boss already equipped, tps already equipped. Finding a small enough bore might be an issue, otherwise tip in would be a bear. Going Megasquirt? Your bringing back memories. Nice work thus far, keep the pics coming in.

[jesse8931]

how are you gonna control the injector

[spacecoastz]

I'm quessing he'll be using a megasquirt ecu.

[BraneDeadX]

Hmm not sure what ECU to use at this point, I can snatch a megasquirt and build it up for 20 bucks no problem, I still have my old EFI board I built ages ago that I can bring back to alive.

It will be very simple to control the injector, just monitor the analog 5 volt output off the MAF and monitor the RPM, use a 2d lookup table be done with it. I plan to use engine temp and throttle position later on for enrichments, but motor this small might not need them.

Hopefully today I can machine up a new flange for my smog pump / intake manifold adapater. Does anyone know where I can find some 1.25" rubber/silicone hose? and I need find a decent K&N Style airfilter :)

[jesse8931]

thats pretty cool i hope you get it working. i have some pics of an efi setup on a briggs i have no idea who they are from tho

[Frank Bullitt]

why not mechanical injection?

[BraneDeadX]

Hmm that sounds better yet, I have no expierence with mech. FI , I know lot of bosch back way when used it, I found intresting site that talks about how the system works.

Going this way would be better then adding more complex parts to the motor, keep it real lean and simple.

I wonder how hard it would be to fabericate a system that worked off just the motor it self instead of electronics, does anyone know anything about this type of fuel injection?

[Taylor]

BraneDeadX,

All it is is like a electronic fuel pump but it is driven by the motor--

Google Image Result for http://www.rpmcat.com/images/3002END.jpg

[BraneDeadX]

I did some work on my motors, here is a quick clip i slaped together tonight, I got it running on EFI what not, I dont know why I cant get motor rev higher?

I tell you what tho, the sound the throttle body makes is insane, sounds like a 4 cycle dirt bike.