Pro's/Con's of converting from Carb to Fuel Injection

[freebird573]

I am starting to restore an '81 GL1100. Thinking of switching from Carb's to Fuel Injection.

1. Is this doable??
2. Any ideas on where to find the information to do this??

[WingAdmin]

I'd love to do something like that too...but I've never seen any third-party fuel injection mentioned available for these bikes. The 1200 SEi guys have hard enough time finding parts for their OEM fuel injection!

[jbmorris2001]

I'm currently working on getting the parts together to convert my 83 over to FI. I love the added benefits that the FI system gives. There is a few different ways to do it and I'm hopping the way I have chose is right. I have a friend that is going to make the plum for me, basic it is just a tub that connects all the cylinders to a single butterfly for the air control. The other part will be the injectors that will be put right at the cylinders and the brain box. I'm hoping to have my new system ready by next spring to see how it runs out. If it runs great I will post and let everyone here know and see if my friend will make a few more of the plums for the systems.

Hopping for the best.
Johnathon

[cyclewizard]

You can do some R&D here.http://www.megamanual.com/index.html

[socrace]

Been thinking about doing an efi conversion on my GL1100 also.
As for advantages: mainly to get rid of carb maintenance, the daily 5 min warmup, and hopefully add some power and milage.
As for disadvantages: nothing cheap, quick, and/or easy about it!
Here's a few ideas I'm looking at, though:
1 - Keep the stock ignition and crank signals for now.
2 - Replace the fuel valve on the tank with a simple plate to mount main and pressure return lines (using the tank's main and reserve connections).
3 - Fabricate a manifold with PVC pipe to resemble a typical inline 4 manifold (4 tubes running from the stock head elbows to a central tubular plenum).
4 - Mount 4 injectors on the manifold pipes, right next to the elbows, aimed at the intake valves. Since the injectors will be far apart, use dead-end fuel lines to each injector (oem style constant pressure fuel system).
5 - Mount a single central throttle body on top of the plenum; probably a Ford 5.0 unit with integrated idle air motor, since it's effective, cheap and have experience writing PID code for it.
Will adapt my own ecu design to work with this. Could use Microsquirt, but costs $400 and would need to modify it quite a bit.
I've done similar automotive projects before, so I know it can work, and also know that there's no money in this stuff; it's just for fun!
Bob D

Yet Another EFI Project:
http://users.ameritech.net/socrace/Main2.html

[freebird573]

Ty for your input. Pls keep me posted on parts list, vendors, things like that. I am a novice at engine work, but have at least rebuilt my inline 4 on my CB750. Also my buddy, who is going to help me , has some good knowledge.

You can also reach me at: free_bird573@yahoo.com

[jbmorris2001]

Hate to bring something back from the dead, but I would like to know if there is more information out there on this. I have a GL1100 that is about to go through a complete rebuild. I understand the fuel injection systems, well the older ones that did not have all the checks in them. Yes the really old stuff from the 70 and early 80's. By what I have read so far the old stuff should be the best for older GL.

The systems that I'm thinking of are off the VW Rabbits, 4 injectors, one cold start with only a simple check of "Is engine cold or Not" very simple yes or no. Past that there is no O2, no master computers to worry about unless you want the extras. The VW system is simple throttle opens pulling up a plate that opens a fuel control value, so when you open the it up the plate open the value and off you go.

With simple style you could cut all the electrics out, no checks, just a fuel pump wired to the switch, a push button for cold start. Has anyone tried this? Head of anyone doing it? Any idea where to find more information on this? I really love the idea of fuel injection, and also love the carbs, but my carbs are shot so it is time to upgrade I think.

Johnathon
1983 GL1100 I

[spiralout]

Try over at http://www.ngwclub.com/forum/viewforum. ... 9e641299a5

[GeorgeA]

Check on the electrical demand of the FI, including the fuel pump.
Old wings have limited charging output, especially at idle.