Newbie: Engine options--who's running what.

[sideways]

no its a great thing if you like to foul plugs and run uneven mixes. these is no sense in running a varying mixture. its either enough or its not. what you fail to see is how running too rich of a mixture affects your power output.

test the fuel mixture your oil injector is giving you i think you'll find its just below plug fouling level

Do you really think the manufacturer (who would obviously know more than everyone on this forum combined) would set up an oil injection system so that it fouls plugs all the time? I have never fouled a plug on a 2 stroke engine equipped with an injection system and they make up probably 80% of my history of 2 stroke use, pre-mixers on the other hand.....

If you are speaking from experience (which I'l assume you are) perhaps the injection system on what ever machine(s) you used needed rebuilding?

There is absolute sense in running a varying mixture, how can an engine not work better with more oil when it is much hotter and under large load? Do you not think that the manufacturers (again, who would know more than any of us and have the ability to test ideas such as this) would have made it so that it injects more oil at wife throttle opening if it was not not advantageous?

Heck, even on Victa Power Torques, a pre-mix engine, they recommend a 50:1 oil mix on residential models and 25:1 on commercial models, the only difference between the 2 is a strait inlet (just a plastic manifold sort of thing) and different jetting. The commercial models are fitted to equipment that needs a lot of power, eg 24" push mowers, large self propelled mowers ect. Power torques are a fantastically reliable engine on 50:1, why would Victa recommend a richer mixture if it wasn't beneficial?

The idea that a richer oil mixture will lessen your power is a commonly held misconception. Have a read of this if you want some proof. 15.7% more power when going from a 30:1 to a 15:1 mixture is hardy a small number, let alone a decrease in power as you say it should be. That's about the most thorough test I think you could do on a single engine too.

Just below plug fouling level is good for me, if my engine is getting as much oil as possible without fouling the plug then I'm pretty happy.

I know an LJ50 (not a motorbike, they're in fact a tiny 4x4 made by Suzuki in the 1970s) uses approximately 1 litre of oil (via an injection system) per tank full, said tank is 27 litres. So a 27:1 ratio, but these engines are somewhat irrelevant as they spend pretty much their whole life at max throttle (so the injection system is going flat out too), they sit on max rpm on the highway and are very under powered. They'l happily do max revs at WOT all day, unlike your average motorbike engine which wouldn't last 20 seconds.

To be honest, I've never really paid much attention to how much oil a motorbikes injection system uses, I might have to start doing that. I always just top them up when ever I go for a ride.

Thanks

Hayden

 

[DustinWolfe]

Do you really think the manufacturer (who would obviously know more than everyone on this forum combined) would set up an oil injection system so that it fouls plugs all the time? I have never fouled a plug on a 2 stroke engine equipped with an injection system and they make up probably 80% of my history of 2 stroke use, pre-mixers on the other hand.....

If you are speaking from experience (which I'l assume you are) perhaps the injection system on what ever machine(s) you used needed rebuilding?

There is absolute sense in running a varying mixture, how can an engine not work better with more oil when it is much hotter and under large load? Do you not think that the manufacturers (again, who would know more than any of us and have the ability to test ideas such as this) would have made it so that it injects more oil at wife throttle opening if it was not not advantageous?

Heck, even on Victa Power Torques, a pre-mix engine, they recommend a 50:1 oil mix on residential models and 25:1 on commercial models, the only difference between the 2 is a strait inlet (just a plastic manifold sort of thing) and different jetting. The commercial models are fitted to equipment that needs a lot of power, eg 24" push mowers, large self propelled mowers ect. Power torques are a fantastically reliable engine on 50:1, why would Victa recommend a richer mixture if it wasn't beneficial?

The idea that a richer oil mixture will lessen your power is a commonly held misconception. Have a read of this if you want some proof. 15.7% more power when going from a 30:1 to a 15:1 mixture is hardy a small number, let alone a decrease in power as you say it should be. That's about the most thorough test I think you could do on a single engine too.

Just below plug fouling level is good for me, if my engine is getting as much oil as possible without fouling the plug then I'm pretty happy.

I know an LJ50 (not a motorbike, they're in fact a tiny 4x4 made by Suzuki in the 1970s) uses approximately 1 litre of oil (via an injection system) per tank full, said tank is 27 litres. So a 27:1 ratio, but these engines are somewhat irrelevant as they spend pretty much their whole life at max throttle (so the injection system is going flat out too), they sit on max rpm on the highway and are very under powered. They'l happily do max revs at WOT all day, unlike your average motorbike engine which wouldn't last 20 seconds.

To be honest, I've never really paid much attention to how much oil a motorbikes injection system uses, I might have to start doing that. I always just top them up when ever I go for a ride.

Thanks

Hayden

im not gonna read all this.... i read the first part and when did i say that it was set to "foul plugs all the time"? i said its just under the foul plug line and your correct i do speak from experience. i dont know who pissed in your cheerios or whatever breakfast cereal you have there but you called me out.

DustinWolfe, I fail to see how you think injecting more oil under load is a bad thing?

so why dont you calm down kid, i wasnt somehow trying to insult you or your 2stroke beliefs. everything i said feel free to reread if your confused

 

[sideways]

im not gonna read all this.... i read the first part and when did i say that it was set to "foul plugs all the time"?

You implied it, here.

no its a great thing if you like to foul plugsl

i dont know who pissed in your cheerios or whatever breakfast cereal you have there but you called me out.

I called you out because you posted misleading/false information.

Thanks

Hayden

 

[Doc Sprocket]

Have a read of this if you want some proof.

I just got nice and comfortable, and dug into this article. Very informative, thanks for posting it!

actually injects more oil as the pump wears out and gums up. The Suzuki CCI systems I've come across are all designed like that. When you're belching smoke, it's time to do the pump.

That's great news (as it applies directly to the CCI-equipped '73 Suzi TC100 I recently acquired.) I have little 2-stroke experience, and nearly none with an injection system. I WAS paranoid about the injection system failing, so it's good to hear that it's likely to over-oil if there's a problem. But I'd love to know how the system can be designed to do that! You (or at least, I) would think that a failing pump pumps less.

One of the very first things I learned about this engine (even before I picked up the bike) was the oil line routing, and how running premix was a horribly bad idea... (and no, I didn't). One thing I DID do- when I first go the engine running, I fed it premix just in case the CCI system wasn't working...