Where do I connect to OMP lines in this thing?

 

welcome to premix

 

 

 

You can tap into the intake manifold runners and route the omp lines that way.
My old 81 with a Mikuni was set up that way.

 

If you install the fitting in the intake manifold, the OMP wont last long as the vacuum will create too much suction. So either premix or install it in the fuel bowl. I've done it many times and for many years.

 

i use the vac lines and my OMP still runs, but i premix as well for back up

 

clean bay wacky, but do you not have an oil cooler?

 

Direct shot of oil to the engine will make a smoky exhaust.

 

It simply sucks too much, eh?
Huh. Never knew that. The OMP never fried on my old SP 13B when it was set up like that. I have also seen a 45 DCOE with 1 inlet nipple port sitting on top of the jet cover. The OMP lines were run to a 'Y' connector (2 into 1) and then the single oil line was connected to the top of the jet cover.

 

Yea I can't see how mechanical OMP can fail due to to much suction, it doesn't even pump oil if you want to get technical, it just channels it. If anything you'd be getting too much oil in the intake, but then again, I don't have years of experience...

 

sounds liek premix is the way to go, what is hte proper mixture for using just premix?

 

thanks. the oc is below the radiator.

 

Suck too much is not really the right word for it but much more like unregulated flow. Instead of the oil coming up on its own, its getting being forced out of the OMP.

 

what he says is true hense the need for vaccume on the 13b oil injectors. they creat balanced vaccume on both sides of the injector for even injection

 

so then what do I do with OMP lines?

 

Posting some pics.

 

Before you start, the carb can be mounted either way depending on your intake manifold. On the older manifold, the cable pulls from the bottom of the shaft; the newer ones, pull from the top. If it pulls from the bottom, then the fuel bowl should be facing the engine. If not, you have to install the OMP fitting above the float’s screw.

For inlet fitting, you can use the stock nikki carb’s brass line. Just cut it in half and use the outer end. You will need 2 drill sizes (1 same size as the hard line / 1 smaller size). I said 2 sizes to counter sink it and prevent the hard line from sliding inside the fuel bowl. Us gas tank repair kit (putty) to completely seal it to prevent a fuel leak. For the soft lines, apply heat to the plastic lines to re-shape it. I use my lighter since Im a smoker.

 

bottom pull


top ull

 

Is that bottom pic a 12a? The casting looks different than on the 2nd picture. Also, What series 13B is the 2nd? The reason I ask is because i can't tell the 13B engines apart easily without looking into the exhaust ports.

edit: I see the 3rd is also a 13B but why are the castings different?

 

Hey wackyracer did u do that yourself?

 

the red one is 12-A big streetport. The top is my RX-3's old 4port 13-B

 

i did everything else except for enlarging the fuel bowl. it helps a lot on top end.

 

Wher did you get the parts to tap into the carb?

 

Enlarging the fuel bowl?? If it is, my bro took care of that at his work since I dont have a drill press.