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Fuel Injection Conversion

  • Thread starter Thread starter Guest
  • Start date Start date
It would be nice if all the pictures would open up. Maybe I just didn't wait long enough........
 
I should have mentioned that this isn't my project it was done by an engineer where I work.
 
The pictures do take a while to open but it is a great article...I would like to get a hold of the guy who did it and have him do a technical write-up for the GSR.

Hap
 
Hey guys, this is my project.

I started it last september and am nearing the end of the fuel control portion (just have tuning left)

Let me know if you want more info about any part.
 
jaysihn said:
Hey guys, this is my project.

I started it last september and am nearing the end of the fuel control portion (just have tuning left)

Let me know if you want more info about any part.
Click to expand...


Any info would be great. If possible, can you track what it cost you to do the conversion?

Hap
 
Its running decent right now. Some spots in the fuel map aren't quite right yet. I just have to install my wideband O2 sensor and do some more tuning and it should be good to go.

Price.. hmm.. the big hitters are the Megasquirt which was around 200 I think. The throttle bodies were about 50. The fuel pump was another 50.

The adapters only cost 10 dollars in materials but I spent about 10 hours machining them so that cost woudl be much higher if I didn't have access to the right tools.

A narrow band o2 sensor could get the job done and cost about 60 bucks but I'm putting a wideband kit in which is another 200.

Temp sensors were 12 a peice and I bought 2 fo them.

The pipe parts and hose barb fittings cost about 25.

Miscellaneous wires and other parts probably cost about 50.

I'd say I'm at about $600. I went into this project looking for a fun project, not necessarily a huge performance improvement. It is turning out to be both though.
 
Out of curiosity, how hard would it be to take a fuel injection system from a newer bike and put it on a GS? Like an EFI system from a GSXR, the new Bandit etc. etc?
 
Umm, where have I seen this....
image009.jpg

Oh yea.. Very similar..
adapter1.jpg

Nice work!! Agree, it justifies a detailed write up.
 
haha where did that picture come from? I honestly never saw that. Its funny because I was going to put some ribs in the collar just like that but after the 10 hours of machining I figured they were good enough.

Putting the EFI from a newer bike is what I did...
You won't get away with using teh stock ECU because its just not going to be tuned right for your motor unless the motors are identical configurations.
 
Very good looking work, congratulations! I especially like about those intake adaptors.

jaysihn said:
I went into this project looking for a fun project, not necessarily a huge performance improvement. It is turning out to be both though.
Click to expand...

Yep, that's exactly how I started my Megasquirt project with my GS1100. And I was too gladly suprised about performance increase. I got about 15% more top end power and even more mid range torgue. There is some before and after dyno graphs: http://www.iki.fi/arttuh/mopo/en_summary.html
 
jaysihn said:
haha where did that picture come from? I honestly never saw that. Its funny because I was going to put some ribs in the collar just like that but after the 10 hours of machining I figured they were good enough.
Click to expand...

Made these to adapt a carb. to a turbocharger. The flow is reversed when compared to yours. Same problem though. Mounts like this:

adapter2.jpg


I would like see details on:

Which sensors you used
Tune (how you mapped it assuming they are using maps)
Pros and cons to the squirter thing (anything you see missing from what's available already)
Any custom software you may have done for it
Robustness (after you have a year or so of time riding it)
 
Lecroy-
The megasuirt is what I am going with to control my secondaries later this yr.
Several members I know on the busa boards are using them now, instead of the high price alternatives.
Many options available for them, many configs.

I just don't feel the need to sell a kidney for one controller ($1500.oo and up),
when I can use one that several people (about 15 so far I know) are having excellent results with for alot less money, and doing the SAME + MORE then your basic controllers..

Please keep the details comming, you guys are peaking my intrest again/

Ron
 
lecroy said:
Which sensors you used
Tune (how you mapped it assuming they are using maps)
Pros and cons to the squirter thing (anything you see missing from what's available already)
Any custom software you may have done for it
Robustness (after you have a year or so of time riding it)
Click to expand...

The minimum sensor package is:
Intake air temp
coolant temp (motor temp)
manifold air pressure
throttle position sensor
ignition trigger


both temp sensors can be pretty much any 1 or 2 wire thermistor you can find. megasquirt lets you calibrate them.

the MAP sensor comes with the megasquirt kit and should work for almost any application including turbocharged ones.

the tps needs to be a 3 wire type and again almost any should work because you can calibrate them for the megasquirt comptuer.

when you build your board up, you have options along the way depending on what type of ignition trigger you are going to use. basically when they designed it they put several circuits on teh board and allow you to populate whichever one you need and activate it with jumpers.

you can add both an oxygen sensor and a knock sensor to allow for better tuning and automatic VE corrections while driving.

Once I get my wideband O2 sensor installed I'll be able to finish tuning and I'll post up my fuel maps for people to use if they decide to try this project.

There is such a huge amount of information avaible on the megasquirt project from www.megamanual.com and www.msefi.com that getting the computer to work right is actually one of the easiest parts.
 
How many amps does it all draw? Are you having any issues with charging after you feed all of that stuff?
 
its still to ealry to tell. I haven't driven it more than a few minutes at a time.


I'm guessing with the stock lights on it might be a problem. I might have to switch over to LED's to swing the balance back towards stock.
 
Fuel injection

Fuel injection

Keep us posted (no pun intended). I've got a Megasquirst sitting in my toolbox. It's kind of low on my list of priorities though. It seems that on these older bikes, alternator power is the biggest hinderance. Not impossible to overcome, but an issue. I know there are some people that have rewound their alternators to get more output.
 
Most significant power consumers in injection system are fuel pump (3-6A typically) and heated O2 sensor (2-3A) if you use one. The rest of the system takes quite little power. Or actually injectors may take up to 4 amps under full load at maximum rpm but during normal driving they take much less.

As far as I know my 1100 have a 250W alternator and it seems to be enough for injection and stock lights. Altough it seems to be on the edge since it can't keep full charging voltage if I turn grip heaters on :)
 
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