"Oil Injectors" - why do the need a pump (omp) and vacuum? And can they leak?
#26
Lets Go Hokies!
iTrader: (5)
Do not simply cap the injectors.
#27
REPU Wanter
iTrader: (1)
Join Date: Sep 2002
Location: Cherry Point / Havelock NC
Posts: 725
Likes: 0
Received 2 Likes
on
2 Posts
It,s amazing to me that people would take the chance on plugging the injector orfice? If you have ever looked at the ejector fitting in the housing you might change your mind on unfiltered air. I was unable to fit anything through this hole when mine was apart for rebuild. Infact the only thing I got throught it was some light! Need less to say it is an extreamly small hole.
Terry7
Terry7
#28
TANSTAFL
iTrader: (13)
It,s amazing to me that people would take the chance on plugging the injector orfice? If you have ever looked at the ejector fitting in the housing you might change your mind on unfiltered air. I was unable to fit anything through this hole when mine was apart for rebuild. Infact the only thing I got throught it was some light! Need less to say it is an extreamly small hole.
Terry7
Terry7
#30
Original Gangster/Rotary!
iTrader: (213)
This subject was already beaten to death over in the single turbo section:
https://www.rx7club.com/showthread.p...&highlight=oil
I know some 'expert' builders that hook them up to a boost source, which is absolutely retarded. Don't do it.
https://www.rx7club.com/showthread.p...&highlight=oil
I know some 'expert' builders that hook them up to a boost source, which is absolutely retarded. Don't do it.
#31
Lets Go Hokies!
iTrader: (5)
Another good thread on this subject:
https://www.rx7club.com/showthread.p...ghlight=vacuum
DamonB does a good job of explaining how the oil injectors work in this post: https://www.rx7club.com/showpost.php...2&postcount=95
#32
RX-7 Bad Ass
iTrader: (55)
Thinking about it, it makes sense. Emissions-wise, Mazda wasn't allowed to have any evaporative emissions, which can come from the crankcase. That's the reason for PCV valves and stuff. Putting the vacuum lines on the OMP injectors will allow them to breathe, but any potential vapors get drawn back into the intake to be re-burned.
I wonder if you could just use some of the little filters that are on the stock rat's nest - they'd probably push right on to the injector nipples. That would solve that problem.
I might have to hook my boost gauge up to those lines and see if they output any noticleable vacuum or pressure, like backflow from the compression of the engine or backflow of boost under load. That would answer that riddle.
Dale
I wonder if you could just use some of the little filters that are on the stock rat's nest - they'd probably push right on to the injector nipples. That would solve that problem.
I might have to hook my boost gauge up to those lines and see if they output any noticleable vacuum or pressure, like backflow from the compression of the engine or backflow of boost under load. That would answer that riddle.
Dale
#33
Lets Go Hokies!
iTrader: (5)
Thinking about it, it makes sense. Emissions-wise, Mazda wasn't allowed to have any evaporative emissions, which can come from the crankcase. That's the reason for PCV valves and stuff. Putting the vacuum lines on the OMP injectors will allow them to breathe, but any potential vapors get drawn back into the intake to be re-burned.
Honestly, this is not much of a mystery once you cut one of these injectors open. There is only a very simple check valve inside. No pintle or other fancy mechanics as others on this forum have guessed. Applying vacuum to these injectors will not affect their operation in any way, shape or form. It just so happens that the stock primary intake elbow is a great place to source filtered air.
Last edited by afterburn27; 02-06-08 at 12:34 PM.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM