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-   -   OMP and premix. any downfalls? (https://www.rx7club.com/2nd-generation-specific-1986-1992-17/omp-premix-any-downfalls-862587/)

thejallenator 09-11-09 03:17 PM

OMP and premix. any downfalls?
 
ok so first off its just funny when you go to the gas station and start addin 2 stroke oil to the gas tank before they start pumping my gas. get asked a lot of questions.
but anyways i recently started running premix in my car but i still have the omp hooked up., havent had a chance to take it off. is this anyways bad? btw its an S4 n/a

Black Knight RX7 FC3S 09-11-09 03:29 PM

well, as long as you are not putting a lot of premix in. 128:1 ratio is just about 1 ounce to 1 gallon if I remember. even at 256:1 which is half ounce for every gallon is still too much with a stock omp still attached. Atleast thats what I think. When I still had my omp still attached I premixed on ounce of premix to every 4 gallon, but thats just me, I dont know about other people.
most people would say that if your omp is working why premix.
When I blocked my omp in my gxl I did a ratio of 256:1. At 128:1 you can see some blue smoke coming out my exhaust at idle.

ericgrau 09-11-09 03:43 PM

Nah, 1/2 oz. per gallon with the OMP still attached is about right. I've done that. It won't cause any problems, though it's optional and provides a minor benefit. IIRC you need to really go overboard on the premix to cause problems, and even then it's just some smoke and small loss of octane.

thejallenator 09-11-09 03:57 PM

well why not? added security. what if the omp goes out? ill be prepared

ericgrau 09-11-09 06:08 PM

Never said it was a bad thing. I've done it before myself, then stopped for a long time, and I'm about to do it again, just haven't gotten around to it. Helps sealing and lubrication a little. Heck, you could even do a full ounce per gallon if you want to be 100% covered in case of OMP failure. Especially in an 89-91 model. I have an 87 and that's less likely for me; pretty much just a minor help. So I'm lazy about it since I know it doesn't matter much. I'm thinking eventually I'll install a separate 2 stroke reservoir to feed the OMP. Then it'd be all benefit and almost no effort.

Worst case scenario at 1oz/gal., IIRC, it smokes a little and then you cut back next time.

thejallenator 09-11-09 06:10 PM

well nothing wrong with a little smoke. highly doubt anyone around here will complain either. alright thanks for the info.


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