Quote:
Originally Posted by FC3S Murray
So what do you recommend Vex? Different pre-mix or keep OMP system?
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It really depends. Do you know the mode of failure with this engine (besides the obvious hardware failure--Ports, etc)? If you were having issues with pre-ignition events I would arrange to use the modified OMP to pump in two stroke directly into the combustion chamber while even throwing in a few ounces into the fuel. This will increase wear on the Apex seals slightly but should eliminate all ash deposits from forming on the rotor surfaces (assuming a clean burn of the fuel in the combustion process). If however you were having more wear problems or some seals were doing damage from increased friction I would use an extremely high grade synthetic/conventional oil with known VOA's (Virgin Oil Analysis) and UOA's (Used Oil Analysis) that show extremely low calcium or even none existent calcium deposits--and thereby having decreased sulfated ash deposits.
If you do go two stroke I highly recommend using the modified OMP because it will allow you to maintain your regular oil reserve for internal lubrication. These parts will then be protected from increased wear of the two stroke, increasing the longevity of the bearings and other wear surfaces internal of the engine. Running the modified OMP will also allow you to maintain an easy indication of the two-stroke oil level and allow proper lubrication of all the seals that see combustion.
If however you choose to stay with regular conventional/synthetic oils I would ensure you use a high grade oil and ensure that proper lubrication is being achieved for the combustion surfaces. These should hopefully be addressed while the engine is out of the car and broken down. Oil injectors, oi lines, oil cooler, oil pump, anything and everything with the oil will need to be spec'd or modified to help increase flow (this includes, but is not limited to increasing the oil pressure to help with lubrication).