My EFI setup

[Whiskerfish]

When I was down in Peachtree City Ga I worked with a very intelligent young Engineer that had built several systems in college and 1 or 2 after collage for his zoom splat cars. We talked about building one several times for my 1000. He was ready to go all I had to do was pony up with about 2 grand to place the first order of parts. He figured by the time we were done about 4500 should do it up nicely. People have underestimated the complexities and cost of this project for a long time. So my hat is off to all of you that are attempting this


BTW I had to go look up Kludgy, I thought you was making that one up there Deek

[socrace]

IS THERE A HOW-TO BOOK or some Hot Rod Magazine primer on fuel injection for those of us who do not have the time to study 25 different sources or the time to pick up a clue at a time here and there?

+1 for the Megasquirt MegaManual: http://www.megamanual.com/mtabcon.htm

As you know, every car built in the last 20+ years has efi, so there are lots of books on the subject.
My favorite for general/advanced reading is "Corvette Fuel Injection" by Charles Probst ISBN 0837608619. GM part number is 12497977, also available at Barnes & Noble;
http://search.barnesandnoble.com/bookse ... 0837608619
I have done some engine management coding, and this is one of the few "readable" books I've found that is also detailed enough to be useful.
Since Megasquirt is based on a mid-80's GM system, it is also a great intro to that system.
The same author has published similar books covering Bosch and Ford systems that are also very good, IMHO.

Have fun!
Bob D

[Old Fogey]

BTW I had to go look up Kludgy, I thought you was making that one up there Deek

Over here, cludgie is a Scottish east coast word for toilet!

[FirstYearDeek]

BTW I had to go look up Kludgy, I thought you was making that one up there Deek

Over here, cludgie is a Scottish east coast word for toilet!

We use it a lot around here... we used to say "jury-rigged" until an avid sailor joined the team and he would go into a long discussion about boat rigging...

-Deek

[ElPiloto]

we used to say "jury-rigged"

We used to say "Mickey Moused".

Fuel injection is as easy to learn as carburetors. You are dealing with pressure instead of vacuum. That's the basic difference.

Back in the late 50s and the 60s, we were using purely mechanical fuel injection, like Hilborn, where the fuel delivery is determined by the pulley size of a centrifugal fuel pump and a jet in the return line.

With Megasquirt, you can set up fuel delivery maps for different fuels, like E85, or different situations, like highway driving or emissions testing. Also you can set up different spark curves to correspond with different fuel delivery maps.

It doesn't take a ton of money to set up a Megasquirt EFI system. You can use junk yard sensors, throttle bodies, TPSs, IACs, injectors, etc., etc.

I am slowly collecting all the parts I'll need for a turbo Volvo system I'm working on right now and a turbo Goldwing after the Volvo is done.

Nobody should be discouraged from experimenting with EFI. Just read the Megasquirt manual a few times and you will be able to know what parts you would need to build an EFI system.

Another advantage of the Megasquirt system is that you can use an ignition system like the Ford EDIS system, and get rid of the problematic Goldwing ignition. All you need to do is put a trigger wheel and sensor on the snout of the crank or the end of one of the cams.

[taunusrainer]

hi...ive been following this with some interest.....i like the idea and hope it really works out....i have a 75 gl1000 with the kick start....do you think the FI will work with the kicker?

I think it will. There is no drop of voltage when You don't use the starter, that means the computer does not need to raise the injector power. But I did not test it so far.

Deek:
Does this pump/reg/Filter setup look familiar to You? It is GM, Opel Calibra 16v.

What do You think?

Ray

[jap4lvr]

the problem is with kick start and a trigger wheel. sometimes you cant spin the motor fast enough for the computer to read the trigger well enough.

[taunusrainer]

OK, I do not have a trigger wheel, I am going fuel only and use the stock ignition...

[FirstYearDeek]

the problem is with kick start and a trigger wheel. sometimes you cant spin the motor fast enough for the computer to read the trigger well enough.

If he's triggering off the ignition system, that won't be a problem.

Does this pump/reg/Filter setup look familiar to You? It is GM, Opel Calibra 16v.

The components look somewhat familiar, but I've not seen them in that configuration. The pump isn't familiar, though. See if you can track down a schematic (Chilton's or Hayne's) Then you can learn something about it.

The other two components are a filter and an anti-siphon valve, not a pressure regulator (I think) which means it's a normal return system and you're missing the pressure regulator.

Find a schematic and all will be revealed!

-Deek

[taunusrainer]

Deek,
this could be the explanation, though I never heard of anti-siphon valves. What is its purpose?
I did not find a schematic, but a pic of the intake setup which is likely to be from the same car I have the pump off.

There is a part which looks like a regulator, close to the very right injector.
Here another view:

Guess I will rehose my fueltrain and will make it in the "normal" way with regulator in the return hose.

Your help is very welcome, I really appreciate it.

Thank You, my friend!
Ray

[FirstYearDeek]

The anti-siphon valve (or anti-cavitation valve) is a pressure relief mechanism that prevents the pump from being damaged by sudden pressure fluctuations. They're unique to external pumps.

Based on the photos I see there, it's a standard system that includes a return line to the tank.

It's definitely the way I would go... there's enough to tune without trying to figure out how to set the duty cycle of a fuel pump!

-Deek

[ECubed]

I have a question about your initial setup, as I'm knocking around a similar idea. What is the ID of the carb elbows at the top (carb) side? Or perhaps the same question put another way, what is the OD of the carb where it's plugged into the elbow. I have 78, intact and running. I don't think I can get one elbow off to measure it without loosening up the whole rack, and I spent enough time syncing that thing that I don't want to risk messing anything up.

Would be nice to know what size spigot I need to plug into the elbows.

[kb0ou]

ECubed,
I measured a manifold I have at home, it is 1.7 inch OD where it pluggs into the elbows.
About 42-43 mm.

John kb0ou

[kb0ou]

Hey taunusrainer,
I have not seen a oxygen sensor in your pictures etc.
What are you using?
Maybe not using a O2 sensor?? Guess ya don't have to with megasquirt.

Is it running?

John kb0ou

[sunnbobb]

previous crosspost post removed.

All you need to do is put a trigger wheel and sensor on the snout of the crank or the end of one of the cams.

If you remove the mechanical fuel pump, you would have a natural place to put a trigger wheel on the exposed end of the cam, I think.