Ok guys my OMP is going bad. Before it gets really bad I just want to disconect it and premix. I got some 2 cycle twc3 engine oil. Do i pour the whole bottle in when i fill up the whole tank? Also how do i disconect the oil metering pump? Thanks

 

How do you know its "bad" normal ration street cars use is 1 ounce to one gallon. So if you have a 16 ounce bottle you pour it ALL in before filling up from E~(1/4)

 

seems the general consensus is to mix the oil at 100:1 ratio (one ounce of oil/gallon of gas) and you'll need some kind of block off plate for the OMP. I'm not sure where you can get one... i'm planning to just make one out of a sheet of alum or steel

 

I think a 1oz to 1gal is a 128:1 ratio. IIRC

 

I have the s4 model, i thought you could just disconect the omp.

 

I used 1/4" aluminum to make mine - a hacksaw goes right through it.

I mix at 140:1, but you can blame that on the size of the MMO bottles.


His profile says s4, so his ECU won't miss the pump. Even if the OMP isn't failing, he won't be doing any harm by switching to premix. He'll arguably be better off...

 

Yeah there isn't anything wrong with pre-mix. I still fully believe that pre-mix is superior to the MOP system. Go for it.

 

so how do I dissconect it? Thanks

 

You unhook the mechanical arm from the TB/MOP and then unbolt the MOP itself. YOu block off the injectors with the proper sized bolts. The details are all in my pre-mix write-up. Search for it under my name and you will find it. It is a few pages long. But the first page is the write-up.


Santiago

 

MMO is not the same as TWC3 pre-mix oil. I would not use MMO as a TWC3 replacement.

And you need to watch your ratio pretty close... too much will lead to the octane being lowered too much and knocking or detonation

 

You thread on that is in the 2nd gen archive as well.

 

Ever done the calculation for the lowering of octane with pump gas by using the standard 128:1 premix ratio? You get more variance in octane levels just by switching gas stations.

 

Okay, hang on a sec -> I'm not THAT retarded.


I use old, empty MMO bottles to carry the premix in, which then go in my spare tire well. An empty MMO bottle holds about 13oz...

 

No, never calculated it... too many variables such as Ambiant air temps and humidity and load.

But intresting enough, that I had a conversation with a couple people about this same subject at 7 stock last weekend... and low and behold had some pre-detonation on my way back when running at around 100:1 ratios. Increasing the ocatane by mixing with a mid-grade gas solved the problem at once.

But as a reminder I am using advanced timing and modified from stock A/F ratios (and it was about 100F out). So my experience with it should hardly be held as an example for all non turbo FCs.

 

whew... you scared me for a moment!!! Glad to know

 

What ratio should I use if I'm keeping my OMP for now, and I just want a little added protection from some pre-mix? (don't have a cat to foul up or anything).

 

Wait, MMO isn't TCW-3?



If you're keeping your OMP, go with about 400:1 I'd say.

 

Nah run a 50:1 mix. SMOKEM BIZNITCH!


Nah I used 3 ounces per full tank when I was still on the pump. Pretty good mileage from it too!