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The EX is not Fuel injected. You'ed be faced with a lot of engineering problems. I suppose you could do it.
FOG
 

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Don't modern FI systems require a chip using lots of sensor input for various temps, pressures, O2, throttle position... ??
 

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yup. FI is complex and horrendously expensive, but it's also über efficient and simple to troubleshoot. It's great when the bike tells you what's wrong! thank god for FI...!
 

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MrSciTrek said:
Don't modern FI systems require a chip using lots of sensor input for various temps, pressures, O2, throttle position... ??
All very true but not all necessary.

You could have a very simple programed system that simply ran all the time and only varied say pressure, to suit throttle opening, and totally ignored all the sophistication of moderen systems.
If I remember correctlly the first GM systems were just that.

FOG
 

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I don't think it would be too easy, but doable none the less. I had a coworker/boss once who turned his carburated Jeep into a Fi system. Spent quite a bit of time on the milling machine from what I remember.
 

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FOG said:
MrSciTrek said:
Don't modern FI systems require a chip using lots of sensor input for various temps, pressures, O2, throttle position... ??
All very true but not all necessary.

You could have a very simple programed system that simply ran all the time and only varied say pressure, to suit throttle opening, and totally ignored all the sophistication of moderen systems.
If I remember correctlly the first GM systems were just that.

FOG
that was basically the Chevy TBI. two massive injectors running all the time with varying fuel flow based on TPS position. easy as pie to wrok on and really one didn't need to understand much. and best of all... it worked. my S10 still works (it's just not mine no more).
 

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FOG said:
MrSciTrek said:
Don't modern FI systems require a chip using lots of sensor input for various temps, pressures, O2, throttle position... ??
All very true but not all necessary.

You could have a very simple programed system that simply ran all the time and only varied say pressure, to suit throttle opening, and totally ignored all the sophistication of moderen systems.
If I remember correctlly the first GM systems were just that.

FOG
In other words, the most basic fuel injection system would simply model the carb/jet model of fuel and air delivery. More air=more fuel, and vice versa. Modern FI aims to smooth out the non-linearity of such a model, dynamically adjusting for air density and oxygen content as needed?

I think. 8)
 

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Administrator said:
FOG said:
MrSciTrek said:
Don't modern FI systems require a chip using lots of sensor input for various temps, pressures, O2, throttle position... ??
All very true but not all necessary.

You could have a very simple programed system that simply ran all the time and only varied say pressure, to suit throttle opening, and totally ignored all the sophistication of moderen systems.
If I remember correctlly the first GM systems were just that.

FOG
In other words, the most basic fuel injection system would simply model the carb/jet model of fuel and air delivery. More air=more fuel, and vice versa. Modern FI aims to smooth out the non-linearity of such a model, dynamically adjusting for air density and oxygen content as needed?

I think. 8)
That's it. all the refinemints that our current systems enjoy are fairly recent developments that are spin offs of the computer reveloution.
The question from the originol poster was could it be? The answer is yes, but don't expect it to be an improvment. My retorical reply was going to be Why?

FOG
 

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Here's food for thought: if the EX ever because fuel injected, what would the forum talk about when all the carb bikes were gone? There aren't any pilots on a fuelie :p.

I'm sure if that day ever came it'd still have the same plastics and the turn signals would still punch holes in the sides when it fell over.
 

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Nick D said:
Here's food for thought: if the EX ever because fuel injected, what would the forum talk about when all the carb bikes were gone?
you're most awesome-ist PCIII maps and what does what with which setting.
 

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"is it possible to use a megasquirt system on the 500?"

Sure why not.
If you were going to do it be sure to use the ignition daughter board.

I've been working with a friend's Venture Royale, Yamaha's land yacht, that has an intercooled turbo with the fuel rail and injectors off a VW. (Of course MY first question: WHY A VENTURE ROYALE? Because he had two of them OK OK, but still...A VENTURE ROYALE???????). It goes like snot.

The megasquirt is easy to work with, allows you do ALMOST anything, it is cheap, readily available...go for it.
...but wouldn't an FI Ex fall into the same catagory as a turbo Venture Royale?
 

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Nick D said:
Here's food for thought: if the EX ever because fuel injected, what would the forum talk about when all the carb bikes were gone?
No problem. We can sit around and play Sarachu exhaust audios and remenisce about the good old days. 8)

OR...

One of the mods could create a program that sought out all posts with the word "re-jet" and change it to "re-map". The words "jet kit" to "PC-III"..... wait.... make that "PC-XXXIV" (it's gonna' be a while). Then it'll be a whole new game, all fresh new material! ;D
 
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I'm gonna poop on both parades (probably), by doing a simple Ben Franklin:

Benefits- Less maintenance, finer control, finer fuel mixture, adaptable to power boosters.

Losses- Cost (may be less if adopted as standard and transferable), no performance gains versus carbs in normally aspirated form, no one makes a conversion kit as of now.

If we use Ben's strict rules, we'll all be FI'ing as soon as the parts become available. However, adding power boosters to a 500r is generally a bad idea so that would make for a tie. Reputable sources report that there were some flirtations with turbo'ed ex250s but no results were mentioned.
 

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Beware of little expenses; a small leak will sink a great ship.
An investment in knowledge always pays the best interest.
~Benjamin Franklin
 

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We converted an older carb'd ZX-6R motor to fuel injection at school on the Formula SAE team. I wasn't on the engine team so I don't know everything that needed to be done, but I know there was at least one hole drilled into the valve cover for a sensor, and you have to do a new intake setup for fuel injectors, fuel rail, fuel pump... not that big of a deal, if you've got the equipment and budget.

You can look around and find plenty of older bikes running megasquirts. Some of the ones I've seen modify intakes off of fuel injected bikes, which gives them the fuel injectors, throttles and throttle position sensors.
 

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Being able to retune it by just plugging a laptop in is nice too.

The stock carbs seem pretty effective, I wouldn't do a custom fuel injection setup unless you are doing something that makes the stock carbs ineffective, like if you are turbocharging or putting the motor into a car or something :)
 
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