NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   Performance Mods (https://www.nopistons.com/performance-mods-20/)
-   -   Oil Injector Block Off (https://www.nopistons.com/performance-mods-20/oil-injector-block-off-22563/)

mazdadrifter 08-12-2003 12:00 AM

I'm removing my omp, and oil injectors and running premix (obviously).



My question to you guys is, what thread size and length are the oil injectors on a series 5??



I know i saw it on reTed's site before (fc3s-pro.com) but his site is down, and I don't really want to "eye" it. I'm afraid that carbon will build up in there if the bolt is too short.



I'm asking specifically about the series 5 rx7, but if someone knows the thread specs for other years, go ahead and post em up, maybe I can save someone the effort.



FYI I did a bunch of searches to no avail https://www.nopistons.com/forums/pub...1047683358.gif

BDC 08-12-2003 02:20 PM


Originally Posted by mazdadrifter' date='Aug 11 2003, 09:00 PM
I'm removing my omp, and oil injectors and running premix (obviously).



My question to you guys is, what thread size and length are the oil injectors on a series 5??



I know i saw it on reTed's site before (fc3s-pro.com) but his site is down, and I don't really want to "eye" it. I'm afraid that carbon will build up in there if the bolt is too short.



I'm asking specifically about the series 5 rx7, but if someone knows the thread specs for other years, go ahead and post em up, maybe I can save someone the effort.



FYI I did a bunch of searches to no avail https://www.nopistons.com/forums/pub...1047683358.gif

M10x1.25x10 to 20mm. Use copper crush washers underneath all four bolts to seal.



B

Lacan91 08-12-2003 04:24 PM

whats the advantage of eliminating the OMP and using premix?

mazdadrifter 08-12-2003 06:13 PM


Originally Posted by Lacan91' date='Aug 12 2003, 01:24 PM
whats the advantage of eliminating the OMP and using premix?

with a quality two stroke oil, you will decrease seal wear, reduce carbon build-up, and eliminate one more thing that can go wrong (it is rumored that the s5 engines didn't last nearly as long as the s4 counterparts because the electronic omp would fail, bringing your engine to a premature death.



plus it puts a big smile on my face knowing how much im helping my motor



btw, thanks bdc, im goin shoppin for them right now



Also do u know where i can find a good price on a e6k??

mazdadrifter 08-12-2003 06:15 PM


Originally Posted by BDC' date='Aug 12 2003, 11:20 AM
[quote name='mazdadrifter' date='Aug 11 2003, 09:00 PM'] I'm removing my omp, and oil injectors and running premix (obviously).



My question to you guys is, what thread size and length are the oil injectors on a series 5??



I know i saw it on reTed's site before (fc3s-pro.com) but his site is down, and I don't really want to "eye" it. I'm afraid that carbon will build up in there if the bolt is too short.



I'm asking specifically about the series 5 rx7, but if someone knows the thread specs for other years, go ahead and post em up, maybe I can save someone the effort.



FYI I did a bunch of searches to no avail https://www.nopistons.com/forums/pub...1047683358.gif

M10x1.25x10 to 20mm. Use copper crush washers underneath all four bolts to seal.



B [/quote]

https://www.nopistons.com/forums/pub...1047683894.gif https://www.nopistons.com/forums/pub...1047683329.gif

j9fd3s 08-12-2003 07:44 PM


Originally Posted by mazdadrifter' date='Aug 12 2003, 03:13 PM
(it is rumored that the s5 engines didn't last nearly as long as the s4 counterparts because the electronic omp would fail, bringing your engine to a premature death.

rumor is not true, the ecu knows about the mop, if it doesnt like what it sees the car she no drive



mike

vosko 08-12-2003 07:59 PM


Originally Posted by j9fd3s' date='Aug 12 2003, 08:44 PM
[quote name='mazdadrifter' date='Aug 12 2003, 03:13 PM'] (it is rumored that the s5 engines didn't last nearly as long as the s4 counterparts because the electronic omp would fail, bringing your engine to a premature death.

rumor is not true, the ecu knows about the mop, if it doesnt like what it sees the car she no drive



mike [/quote]

well it will drive like crap. unplug your MOP and find out https://www.nopistons.com/forums/pub...

7mech 08-12-2003 08:47 PM

If you don't want to go and buy new bolts just cut the oil injector lines close to the injectors and call it good. It worked for me. No leaks or anything.

j9fd3s 08-12-2003 09:37 PM


Originally Posted by 7mech' date='Aug 12 2003, 05:47 PM
If you don't want to go and buy new bolts just cut the oil injector lines close to the injectors and call it good. It worked for me. No leaks or anything.

you sure? it might be a vacuum leak



mike

mazdadrifter 08-12-2003 11:32 PM

well i found bolts that would fit perfectly (m10 x 1.25 x 20) but was informed of the difference in accuracy of machine bolts, and automotive grade bolts. Long story short, the identical machine grade bolt (I could only find machine grade) doesn't fit near as tight as the oil injectors. I think I'm just going to cut the nipple off the back of the injectors and hit it w/ a spot weld, then sand to smooth. You guys think that would work well??



I was just thinking of sealing the outer part of the injector, should I weld the hole on the bottom shut as well??


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