as u might have seen from my previous posts am putting a series 5 13b turbo motor (ex the turbo) into a first gen. street ported, rb header and 48 ida. I have also put on the 12a front cover so as to mount into first gen.

as you know, the 13b turbo has electric omp with 4 lines. 2 go to intake manifold and 2 go direct into the housings. In my case I am no longer using the original intake so i've lost those 2 holes. however, i still have the two holes on the housings. So....from what initially looked like a premix situation, my thought is that i can hook up the 2 line mechanical pump from my original 12A and connect these 2 lines to the oil injectors in the 13b housings. the mechanical arm of the pump i can connect to the weber linkage. but now i see that the oil injectors had an air tube on them. also, there is like a valve in the housings.

my questions are therefore :

can i block off the air tube or does the oil injector need the air to force the oil down into the chamber ? and where did that original air tube hook up to anyways ? also, was it a one way type valve as well ? i've still got the original hose here...funny looking thing..very curvy with 4 into 1

is the valve in the housing some sort of one way valve

given that i've now made the linkage mechanical it will only pump a little oil when u depress the 'loud' pedal. is this sufficient oil ?

also, as the original setup had 4 oil nozzles and now i'm using only 2 am i in fact adding too little oil and therefore this whole exercise has actually been futile in that i should just have blanked off the omp and the 2 nozzle holes in housing and go premix

just in terms of premix, what is the ideal ratio ?

c

 

The injectors are supplied with filtered, non-vacuum, fresh air. The center injectors lube through the primary ports, the others lubed through the secondary side. Some of the RB intakes have barbed pipe nipples tapped in the intake, you could do the same thing on the secondary side of the intake and run 4 mop tubes for better lubrication.

Why are you using the 12A front cover and not the SE one?

 

whats diff between 12a and se front cover ? i'm in cape town...so just used the front cover with which to mount into the first gen ie the one with the 4 studs in the front for the cross member.

 

Brain fade. The SE front cover is for the fuel injected 13B we got here in the States, the rest of the world got the 12AT. The SE front cover has 4 lines coming off of the mop.

If it was me, I would block off the injectors in the housing and tap each intake runner for a barb nipple and tee both mop lines, one line for each rotor.

 

The FD and later engines did away with the 3rd and 4th injectors and just ran the oil injectors on the housings.The direct lubrication to the rotor housing wear surface's proved to be adequate,it reduced oil consumption and eliminated half of the oil metering system's potential failure components.

Just hook up the 2 oil injector's on the rotor housings,and plumb the injector's vacuum hoses to a nipple on the intake system that is after the throttle body.The check valves in the injectors will close off when vacuum is gone,keeping the oil from dripping when the engine is off.
If your still worried,you can always run a little bit of premix in the fuel,as an added precuation,just keep it to a really light mix....

 

steve, are you sure the injectors need to be connected to the intake manifold ?
should i not just leave them open ?
been reading some other threads here that in fact that 4-1 hose just went to a filtered air vent and not a vacuum

 

Wrong.
The 4 injector hoses run to a common point,then tie into the intake manifold after the throttle body.On the TII its in the back next to a couple other small vacuum sources.
Its called the spider and its often is brittle and needs replacing,which is why mazdatrix sells new ones.


http://www.mazdatrix.com/c-5.htm