Injection ???

[Anonymous]

Does someone have enough nowledge about injection to tell me wich units needed for a minimum instalation on my GS1100 -82, and also
recomended brand that would work ??
Are there an option to use kits from other bikes/cars ?

KnutK

[Dink]

I have been thinking along similar lines and I reckon that the injection of a late model GSXR sounds a good candidate to me. You would need a replacement ECU (to "re-jet" it) but these are commonly available. I have not got far enough as to be able to offer any dimensions etc. but I think it would be feasible.
Dink

[Hap Call]

You would also need the various sensors such as oxygen and cooling water temperature (that would be the hard one to mount on our bikes). I'm very interested in injection systems. RC Engineering may have something for our bikes...remember, they are the guys who Yance & Hines worked for before they started their own company. RC Engineering is big into fuel injection these days.

Hap

[Anonymous]

Motor cycle manufacturers have been using injection for some time, but it is only in the last few years that they have been able to get them to run properly. The most common fault is lumpy/jerky running on fine throttle movement. This makes it difficult to ride the bike smoothly in city traffic. The bike companies sometimes issue new downloaded ECU maps and profiles when they figure out how to deal with some of these issues, years after the bike was made.

If the big guys take many years to sort out this problem it seems likely that it will be a major factor in setting up something with stuff made for another motor.

I've thought of making an injection setup using stuff from a small car from the wreckers, but these thoughts are daydreams rather than real thoughts. I bought the bike to ride it, not to think. :-)

Kim

[redliner1973]

Does not a Harley have a fuel injection on thier air-cooled roadkings and such? perhaps something can be made from that? :twisted:

[focus frenzy]

here is a source for made to order fuel injection systems for motorcycles!!

http://www.rbracing-rsr.com/efimotorcycle.htm

I have a kawasaki zn 1300 voyager, that is fuel injected, the only problems I have with mine is it does not account for all the parameters it needs to work at all rpm level, if you wack the throttle wide open at low rpms, it will dump the gas to it, flooding out bad, other than that it works great, cold or hot it starts with just a bump of the starter and can be rode away with out having to wait for it to warm up.
another benifit of fuel injection is the gas mileage, my 900lb FULL dress touring bike gets better mileage than my gs!

[Anonymous]

I saw an article in Streetfighter magazine an issue or 2 ago, and they had an 1150e with FI and i think ported heads making something like 170hp on a dyno.

[Anonymous]

Are these FI bikes running mass air? speed density? alpha-n?


-=Whittey=-

[redliner1973]

Are these FI bikes running mass air? speed density? alpha-n?


-=Whittey=-

Ok now....Tooo much math...!! :twisted:

[Billy Ricks]

The reason injection never got big with air-cooled bikes is the wide range of operating temperature range. It's too hard to keep the motor in a narrow enough range to keep injection working right.

[Anonymous]

One question, KnutK. Why?!

Given all the attendant problems, the likelihood of inferior running and the easy availability of numerous carburettor options, Why?

[Mastiff]

We had a post awhile back from someone who was making his own FI controller. The writer was MrFluffy; he was turbocharging and adding EFI. This is from the thread.

SLOWPOKE wrote:

THATS A MOD THAT WILL GIVE ANY BIKE THE BEST OF BOTH WORLDS-- WHAT DOES IT DO ON THE DYNO WITH THAT MODIFICATION??? I CERTANTLY HAD FORGOTTEN ABOUT TURBO CHARGING WHEN I MADE MY COMMENT ABOUT MODIFYING A 700cc

Ive not had it on a dyno yet, but when my shiney new homebrew efi computer kit arrives Ill be assembling it and doing some dyno runs to set up the fuel maps. What a deal that was, $120, and some soldering and I get to do my jetting with a laptop. I hate changing jets in carburettors....

Link is http://www.thegsresources.com/_forum...ght=megasquirt

[focus frenzy]

One question, KnutK. Why?!

Given all the attendant problems, the likelihood of inferior running and the easy availability of numerous carburettor options, Why?

simple, emissions are easy-er to keep down with FI, you get better fuel mileage, better low end torque, easy-er starting hot or cold, better throttle response.
the biggest problem with the early systems, and some of the current systems is that they used a primitive system that was slow to react to inputs, and didn't use enough parameters to calculate the need for fuel.
my voyagers system only looks at coolant temp, rpm's and throttle position, it has no way of knowing how much air is being drawn into the engine.
that was the biggest problem, for a fuel injection system to work correctly it has to be able to "see" how much air is being drawn in.
my car has the newest OBD II system and it calculates injection rates based on air flow rate, intake air temperature, barometric pressure, engine temperature, throttle position, throttle movement, engine speed, car speed, and driving style.

[Anonymous]

I think you're missing my point there Leon.
I know the benefits of a factory fitted EFI system. I'm not dumb.

I do know however that it will be extremely difficult and complex to fit FI to a GS1100 or any other bike not designed for it. I was recently talking to a guy doing just this on a turbo'd GS1000 for drag racing. The system required a lot of effort to fit and set up, and thats for drag racing where the only requirement was to go as fast as poss and not blow the motor up.

All those things you describe ( fuel mileage, low end torque, easy starting hot or cold, excellent throttle response) are available a GS from many of the different carb options available (Using later gsxr type CV carbs, RS, CR) with no attendant problems.

You are unlikely to be able to fit all the sensors you mention as fitted to factory car and bike set ups to a gs engine without a huge engineering job. Without those sensors, you will have a basic FI system no better than carbs. What makes FI so good is the feedback provided by the sensors.

I'm not saying it can't be done. Nor that it shouldn't be done. My question is why? What for? Warum? But hey, go for it .

[Anonymous]

The TECII I referred GSBuilder to works well on the first start-up and only needs to be tweeked. It is worth about a grand without sensors or injectors though...I think its main purpose was to fit EFI on really old vehicles and racing applications. If you do a websearch you'll find homebrew EFI kits that don't cost much or anything.

If you are going to go EFI I would put it on a spare engine so that you can take your time figuring it out and machining parts.

If you think EFI used to be bad in the early days, think about the old ABS systems they used to put in! clunk, clunk, clunk....

Steve