Fuel/oil premixing?

[Sean]

I read on a yank site that the best way to prolong the life of an elderly rotor, is to premix 2stroke oil with each refill. Is this true? I still have the original OMP running as well, but I don\'t want to do more harm than good!

I put some ordinary motorcycle 2stroke oil in the other day, and it smoked like good\'en. Did I put a little too much in or should I just not bother?

Cheers for help?:confused:

[88GT-R]

Hi Sean,
 Premix is seen as a good idea due to the fact that the 2 stroke oil is designed to be burnt in the chamber and leaves no carbon deposits, and little residue. Before i had my engine stripped and rebuilt, i was runnung premix with my mechanical OMP at a ratio of about 400:1. When putting in 40 litres=10ml of premix. On inspection of the rotor housings, they were found to be extremely clean with minimal carbon build up around the plugs. I now run the car only on synthetic premix, with the OMP system removed and plugged. This also allows the engine to be run on a synthetic oil, to allow the best lubrication to  the bearings and turbo system. I premix at a ratio of 150:1. I do experiance smoke on start up, and occasionally during acceleration.

I hope that this explains a bit about the subject, but the yank sites have more info.
Regards.

John

[Sean]

I\'ve been getting oil blow back on the rear of the car!!!!
Am I just putting too much in or should I stop doing it because the cat will be full of oil by now?

[88GT-R]

HI,
Can you elaborate on you blow back? Is it liquid or soot? What mix are you using? Check your spark plugs, and see what colour they are. They should be a dark straw colour. What fuel are you using? When premixing..depending on how much is used.. the octane level of the fuel is lowered. How much excactly i am not sure. In you case, it will be barely noticable.
 You will get white smoke on start up, but should disapear once the engine is warm.
I hope this helps
Regards,

John

[Cycaduk]

Hi,
I have been given an oil metering pump adapted to take its supply from a separate tank. The instructions I was given were that the tank had to be at least 8" above the OMP, and that I had to block off the inlet in the block.
Would anyone have any experience of these?
How do I block off the hole?
thanks
Dennis

[88GT-R]

HI,
I have no experiance with your system, but it seems like a good idea...only have to make sure that it is always topped up. The origanal OMP works using a worm and worm wheel gearing. This means.. as far as i know, the front plate may need removing before the OMP can be removed. Can anyone else confirm or elaborate?

John
88 GT-R