Premix Examples ?

[sadgoth]

isnt doind this just an easy way of screwing your injectors?

what adding premix?

Remember the rotary engine injects oil into the combustion "chamber" anyway so it shouldn\'t affect the injectors at all. Thing is if you are running higher power than standard the mazda oil injectors aren\'t up to the job of supplying enough oil into the combustion process. Additionally if you run certain ECUs the OMP isn\'t controlled anyway so you need to add premix into your fuel.

[stocky]

silly question should the petrol always be mixed with 2 stroke oil??

[memski]

silly question should the petrol always be mixed with 2 stroke oil??

Not if you\'re still using the stock omp. Some add a little 2stroke (at a more dilute ratio) if running single with a fair bit more power but no need if you\'re running fairly stock with the omp.

[stocky]

as far as i know its a stock omp does anyone have a pic of one?
mine is running an apexi fc on standard settings with twins

[TiddlesRX7]

So what premix and how much to a tank should I run in my FC with stock OMP. It\'s only for the run down to RS5 tomorrow.

[David Nock (RIP)]

Don\'t think you\'ll get Millers in time, but if you do, I run at 250:1, thats about 150ml to 40 litres of fuel. Some might say I\'m over-premixing at that, but the 12A engine with carburettor is very happy at that ratio. That\'s with a stock OMP in action as well.

[Jürg Hensdiek]

So what premix and how much to a tank should I run in my FC with stock OMP. It\'s only for the run down to RS5 tomorrow.

Hallo,
Go for a 400:1 ratio. This is 100ml 2 stroke for 40lt of fuel.
 
J

[mutleysfriend]

Quick question: If you have the OMP and start using premix do you need a remap?
mf.

[Locki]

Any link for this? Sounds interesting...

Found this site: http://www.rotaryaviation.com/oil_injector_pump_adaptors.htm

Never looked into premixing before but after readind this thread I think i\'ll start doing it, if it helps prolong the life of the engine.

[David Nock (RIP)]

Found this site: http://www.rotaryaviation.com/oil_injector_pump_adaptors.htm

Never looked into premixing before but after readind this thread I think i\'ll start doing it, if it helps prolong the life of the engine.

I only do it because my engine is ancient and I worry that the OMP may fail without me knowing.
In the link, I don\'t think I quite go along with the idea that your sump oil gums up the seals - if you use proper mineral with as few additives as possible it shouldn\'t gum up. So then isn\'t it easier just to tip premix in the fuel tank at every stop?

[Locki]

In the link, I don\'t think I quite go along with the idea that your sump oil gums up the seals - if you use proper mineral with as few additives as possible it shouldn\'t gum up. So then isn\'t it easier just to tip premix in the fuel tank at every stop?

I don\'t disagree with you at all. I\'m not saying the link is correct, or that it is what i believe. I don\'t have any knowledge on this subject at all, I am merely interested. I had a look around on the web and found a site that had an alternative to premixing the fuel and oil, and because somebody asked where the link was, i thought i would post up what i found.
I do agree though that it would be just as easy to add your own oil to the fuel, rather than take up more precious engine bay space and add an extra oil tank + pump into the mix...

[David Nock (RIP)]

I don\'t disagree with you at all. I\'m not saying the link is correct, or that it is what i believe. I don\'t have any knowledge on this subject at all, I am merely interested. I had a look around on the web and found a site that had an alternative to premixing the fuel and oil, and because somebody asked where the link was, i thought i would post up what i found.
I do agree though that it would be just as easy to add your own oil to the fuel, rather than take up more precious engine bay space and add an extra oil tank + pump into the mix...

Cheers Locki, I realised then that you were simply passing on the link, I didn\'t think for a minute there was any agreement/disagreement. The link might well be right anyway, but my 12A hasn\'t gummed up yet - it goes as well as it did new. Hence my comment that I don\'t think they\'ll gum up with good mineral oil.