Rotaryphil

Could you not just remove the oil injectors without removing the pump? or even keep the omp system working PLUS run premixed with a little less oil??

I know your going to say "Well what if the OMP fails then you won't have enough oil premixed"

How often do the OMP pumps really fail?

Jeff20B

iTrader: (13)

Never. They sometimes leak but keep meetering oil into the carb (or oil injectors).

Latin270

Mechanical OMP is actually very reliable its the lines that can crack and cause problems. Premixing is something I along w/many others here do because we either removed our OMP or as added protection. Just dont over do it if your still running your OMP.

Rotaryphil

Reason why i asked is because i want to run premixed on a T2 in a FB. I am running the stock ECU for a while so i wanted to remove the OMP pump and tie it off somewhere so the ECU still gets the signal. I figure why trust the OMP with all the work i am putting into it. Plus 2 stroke oil lubricates MUCH better when burning than the dirty 4 stroke oil in the oil pan.

Rotaryphil

Anyways this topic has been discussed a million times,

- End of posting

trochoid

iTrader: (6)

The S5 e-mops have been known to fail, then they put the ecu into limp mode to protect the engine. The mechanical ones as stated rarely if ever fail.

Skidtron

iTrader: (1)

Can't do that there's a stepper motor and a position sensor. If the sensor doesn't see motion from the steppermotor then you are in limp mode. I am using the S5 stock OMP but the cars not finished and running yet so I don't know if it's reliable or not. Just buy a new one if yours is bad. I know they are expensive but you can't go fast for cheap.

Rotaryphil

I'll just take the OMP Pump off the S5 T2 engine and tie it off in the engine compartment still connected, make a block off plate and weld it in and run premix. End of complications lol

dyoungre

One other reason to block off the OMP when running premix is that you can then run Mobil 1 in your sump. Mobil 1 is great for bearings, but creates a lot of ash when going through the combustion chamber.

As said before, though, the pumps themselves are pretty reliable. Why not use the OMP to feed 2-stroke oil from a resevoir, instead of having to dump 2 stroke oil in at every fill? I bet there are threads here somewhere describing this modification.

trochoid

iTrader: (6)

For those not familiar with the S5 and later e-mops, which is 1300+ to replace new btw, they take a different mounting than the mechanical ones. Afaik, there is no adapter made for them to allow injection from a seperate tank of pre-mix. The e-mops are tied into the ecu to more efficiently regulate oiling of the housings. Leaving the e-mop connected and tieing off to the side is one way of getting past making the adapter for the front cover. One still needs to premix though because the S5 throttle shaft has no provision to connect the mechanical mop rod to. The other option is to use the SE front cover with the 4 line mop and set it in a fixed position at near full open.

If the e-mop is not connected or fails, the ecu goes into limp mode to protect the engine. It has been said that on occasion, a failed e-mop can take out the ecu and vice-versa. When that happens, it gets very expenxive, very quickly.

Rotaryphil

can the omp being tied off get worn out or jam up because it not submersed or pumping oil?? how long would it last tied off in the engine compartment still connected to the ecu?

other thing, is an e-mop basically the same thing as a omp?? just bolted to the front cover? i'll be using a gsl-se front cover on a S5 T2 engine so the e-mop is on the S5 front cover right? so i don't have to deal with it?

trochoid

iTrader: (6)

I haven't read anything on how long it will last tied off, no one has posted any failures that I know of. Steve84gs had his front cover modded to accept the e-mop and has had no trouble with it. This in the long run is probably the best way to go unless you plan on going standalone later.

As far as the e-mop needing lubed, don't know for sure but I doubt it. Deal with it, yes, you have to have it plugged into the wiring harness if you're running the stock ecu.