ok so I have a S5 NA block I plan to P-Port and use EFI, and I was thinking about using a 12A OMP with an external resevoir so that I can inject 2 stroke oil into the rotor housings. So my question is will only using the oil injection ports in the rotor housing lubricate the rotor enough or will I still need to pre-mix? If I do need to pre-mix is it safe to use with EFI, will the oil clog the injectors or anything?

 

Pre-mix in the fuel will not clog the injectors. Add 1/2 oz/gal when also using the MOP. The FC/FB 13B engines have 4 oil injectors for a reason. The pair in the housings covers a limited area that often shows up in the wear pattern on high mileage engines. Pre-mixing provides the best protection.

 

i don't think that should be a problem, as the pre-mix is at such ratio that once it is mixed up well it won't be too viscous. although keep in mind that people have experimented with some varieties of two stroke oil and found that after enough time sitting it can have the tendency to settle out of its mixture. i've pretty much always run pre-mix in my SA but it is carbed so I'm not sure about the chances of it causing issues with fuel injectors. still i would think that you should be ok because it is such a dilute mixture. about 100:1 is what i've been told to use, and that is for racing purposes, assuming that you are going to be running WOT the majority of the time. for street driving purposes you could run any even leaner gas to oil ratio. I still always just went by the rule of thumb one ounce per gallon which was like 128:1 ratio. and I used the suzuki cci-super two-stroke oil, its not the Tcw-3 that everyone says to use but i got a boatload for cheap and it seems to be really good. but anyway don't know if this is helpful but i think you should be fine just so long as when you're premixing you don't let a tank sit for too long and it may tend to settle, but like i said i've only ran carburated so...some else would need to comment about using it with efi.

 

well i guess there is your answer, which was replied while i was typing up my rant....people always tell me i talk to much, i guess the same applies to my typing