I bought a s5 turbo engine and removed all emissions stuff then blocked them off and am in the process of putting it in my n/a. also i removed all vaccum lines to simplify everything and make everything have a nice clean look. my question is if i block off my electric OMP and run premix what is the ratio of gas and oil? How reliable is running premix (example: does some of the oil get filtered out going throught the fuel filter)? Also i would like to hear comments from people that are currently premixing and what type of 2 cylce oil they use.

Thanks

 

More importantly, how are you going to fool the ECU into thinking it still has an OMP connected to it? Or is this going into an S4?

 

it would be going on an s5 so i dont know how i could trick the ecu. unless the bolts for the oil injector lines are banjo bolts and i just take a couple of regular bolts and put them in there with a little thread sealer and still leave it wired up to the ecu to trick into thinking it still works....maybe? Also would anybody know where to get aftermarket fuel rails that have all ready been drilled out to fit on the primary and secondary rail?

Thanks

 

The only ways to get rid of the OMP on an S5 are to get a standalone ECU or unbolt the OMP and tie it up somewhere in your engine bay (unless you figure out how to fool the ECU). It doesn't necessarily have to be installed on your engine, the ECU just needs to see that it is connected to the wiring harness. Then you can plug up the holes with regular bolts, just make sure they are the same length as the banjo bolts.

If you're going to have to keep your OMP in your engine bay anyway, you might as well just keep it functional, IMO. Unless, of course, you go with a standalone.