As the title says, which two lines would you use, the ones that go into the rotor housings or the ones that go into the primary intake runners.

To me it seems like injecting into the primary runners would provide better lubrication to the internals than injecting part way along the intake stroke.
What's your opinion?

 

I seem to recall that the FD uses only two MOP lines... you could ask and see where they run.

But of course the FD motor is not as reliable as the FC ones.

 

I dont think the FD motors are unreliable due to the OMP system, but whatever.

My opinion on this?

Mazda designed it one way, why tamper with it?

 

FD only uses the 2 main ones in the rotor housings though i still don't think that is adequate, the spray only really lubricates the middle portion of the apex seal where the primary injectors on FC engines lubricate all the internals.

which is better? i couldn't tell you which protect better, in my opinion you still want all 4 or get rid of them alltogether and premix is a better option.

 

i'd use neither, and run premix.

 

werd

 

there is a reason for the OMP to exist, to get an even distrubution of the oil in the housing of the engine. To make the system even better, rebuild the feeding of the OMP to a separate tank and feed it with premium 2stroke oil and use the best oil you want in the engine. This is the solution I'm going with until next year.

As J-Rat said, Mazda designed it, I'm guessing it's because they had their reasons

 

Pre-mix FTW.

 

you posted a while back its true you've been around so long youve forgoten more about these cars then we know.

https://www.rx7club.com/showthread.p...&highlight=MOP

 

especially when looking at the Renesis engine which uses 4 oil injectors, I think Mazda fixed their "mistake" with the FD oil injection system.

but FTW, premix is best. no pump that can fail, no lines that get brittle and crack... just got to remember to add a little magic juice when you fill'er up.

 

Using only two lines on an FC 13B would be very foolish. The FD only had two because it had new rotor housings with a low-friction surface that required less lubrication.

The Renesis's extra injector is more about distributing the oil more evenly over the housing surface, not increasing oil flow. If it just needed more oil it could've been distributed though one bigger nozzle.

 

****the spray only really lubricates the middle portion of the apex seal where **********8


I don't buy into that idea, which by the way I've seen numerous times on this forum. The hole for the rotor OMP is located where? It is located right at the point/beginning of the intake stroke. It does not dribble in (absoulutly IDIOTIC statement). Only a DUMMY would say the OMP dribbles the oil in the rotor housing or a TOTALLY CLUELESS PERSON.