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Old 06-21-2013, 04:28 PM   #1
crg infidel OP
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Inject oil w/Scottoiler?

Hey all,

I tried search, and got nowhere. So bear with me.

I love seeing things used for purposes in which they were never, ever intended. I can't help but wonder if a Scottoiler (chain oiling system) or other such small oil pump, could be made to inject oil into the intake, thus eliminating the need to mix. Mixing gas & oil seems to be a hang up for some, and a deal-breaker for others.

One of the Scottoilers is vacuum operated, and the other model is electronic. I must admit that I have no experience with these, but the idea seems feasible if some issues could be overcome.

Can they be made to flow enough oil for the application?

Can they be regulated for more output at higher RPM?

Has anyone ever seen a system to inject oil into a 2-cycle that was not a factory unit? If (like a lot of my ideas) this is more trouble than it's worth, that's fine. But it would sure be fun if it could be done.

We have some very skilled and experienced folks on this forum, and I'd love to hear what their thoughts are.
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Old 06-22-2013, 11:59 PM   #2
brianwheelies
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The Aprilia SR50 Ditech Morini engine uses an electric oil pump.

If you want vacuum operated there is a mikuni fuel pump used on scooters that maybe couldbe used with an injection oil.

I tthink vacuum is a bad way to go as you need rpm dependent and not load dependent.
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Old 06-23-2013, 10:22 PM   #3
crg infidel OP
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So....

If one gallon equals 4546ml, and you're using a 50:1 ratio, then you're putting in about 91ml/gallon. That would have to be a damn low volume pump!

What about a variable speed paristaltic pump? If there was a way to have a signal from the plug wire control the pump speed, then it would be linked right to the RPM.

Does anyone with more electronic experience than myself, know of a way that such a pump could be governed with the RPM?
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Old 06-24-2013, 06:10 AM   #4
joexr
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This whole thing sounds like a good way to seize a motor.
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Old 06-24-2013, 08:13 AM   #5
crg infidel OP
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Originally Posted by joexr View Post
This whole thing sounds like a good way to seize a motor.
Hahahaha! I think you're probably right! I'm most likely looking for the answer to a question that isn't being asked (wouldn't be the first time).

Maybe I should be asking what technique you guys are using to get an accurate mix when you fuel at a pump.
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Old 06-24-2013, 11:38 AM   #6
brianwheelies
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Math and a proper measuring device for the oil. Calculator helps on the math part. Kind of a pain that you have to shake the bike after to mix it up if you don't know how much fuel you are putting in to add the oil before adding fuel.
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Old 07-01-2013, 05:17 PM   #7
81cr450
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I personally think your idea has merit. If you can figure out how to inject the oil load based it would well be worth doing . They didnt use the old oil injection pumps because it was cheaper & easier
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Old 07-01-2013, 08:36 PM   #8
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If it ain't broke don't fix it. But it appears you prefer if it ain't broke fix it 'til it is. Be sure to post photos of the carnage.
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Old 07-02-2013, 10:55 AM   #9
Foot dragger
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Quote:
Originally Posted by joexr View Post
This whole thing sounds like a good way to seize a motor.
It is so,so,easy to put oil in gas,and so expensive to buy a new crank and top end during experiments.

Maybe try an aquarium pump for a super charger next? Or belt drive made from real belts,like size 34's.
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Old 07-31-2013, 08:19 AM   #10
buls4evr
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Quote:
Originally Posted by joexr View Post
This whole thing sounds like a good way to seize a motor.

YUP
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