You probably just couldn't hear it before when it was on the charge tube - that would muffle it nicely .


No check valve necessary on the omp line (it wouldn't hurt though) - each individual injector has its own check valve anyway .

 

Hmm... so you think it's nothing to worry about? It's really a **** off (pretty annoying) I wonder if a check valve would help muffle it...

Are oil injectors crapping out a common thing? I haven't really heard of it and my car only has 40000kms on it

 

Maybe - one way to find out . I think Gregs lost the noise when he fitted the AEM intake - Greg ?

Have heard the check valves can stop working - there is a checking procedure for them . Don't ask me how to do that .

 

hmm, I wonder if having the OMP line on the Charge pipe screwed with the check valves on one or more of the injectors somehow

Will have to look into how to check them.

Hopefully someone who's seen this before can chip in...

 

OK - just did a little test . Hooked the omp breather line up to a boost guage . It draws high vacuum at idle and even higher under load but does NOT see boost . If yours sees boost the check valves would have to be faulty .

 

https://www.rx8club.com/showpost.php...&postcount=309

https://www.rx8club.com/series-i-major-horsepower-upgrades-93/omp-boost-potential-problem-117352/

 

Both of my lines are going into my intake tube as I don't have a nipple on my charge tube. I see RotaryMachineRX's photos and am pretty familiar with my turbo setup and rotary mechanics but never dealt with check valves. I understand splicing the jet air hose and inserting a check valve but what is the other line that goes into the valve? Where does it go?

 

That's not a check valve... It's a Tee fitting for my wastegate actuator signal. Also I was thinking iff the oil nozzle check valves did see boost airflow would still be in the same direction as under vacuum and shouldn't hurt the check valves...i think haha

 

Okay reading the links Team posted (thanks by the way team!) having the OMP line hooked up post turbo is actually not a bad idea..... Although that is from 2007 I still think I am going to do a vacuum test on them with a hand pump. While I'm at it i will also do a vacuum test on my ssv actuator as it looked easy to get at with the air pump removed and i think mine was causing low MAF g/s when i was N/A.

 

Does anyone have a photo of a check valve in their jet air hose? Got a couple options to go with and would like to see a pic before I start fiddling.

 

here ya go

 

Thanks. I can work wit that.

 

just want to make sure what color is which hose "Jet Air Hose was marked with a yellow patch on it and the air hose from the OMP is marked in a White patch.?? thanks

 

Correct

 

thank you for reply .RotaryMachineRx

 

I installed a check valve in the jet air hose today and took the car out for a spin. My AFRs are leaner but considering I was running a conservative rich tune anyway I see no need for a re tune. Didn't get enough time to notice a power difference as I was too concerned with monitoring my fuel ratios but I did notice a difference in how fast the car accelerated. So far I'm going to leave it.

 

Okay so if I want to do a vacuum test on my OMP nozzles do I have to do each one separately or would I be able to do the test on the OMP breather line? I did do the test on the breather line and I'm not sure is it's just the vacuum pump I am using or not but it would only get to about -0.5 bar (-7.25psi); where it is required to get to -9.65psi. After getting the vacuum as high as possible through the breather hose it would hold it for a few seconds then eventually go back to atmospheric in about 15 seconds.

 

I had the same issue. Then I put the car back together and never tested the negative on each injector

This will be an upcoming weekend project

 

Geesh my head is spinning. I am glad I replaced my OMP and all the vacuum hoses while I was in there.

 

I know what you mean man, every greddy thread (every important modding thread for that matter) has back and forth opinions and ideas on just about every little thing. At the end of the thread you still sit there and say, "sooooo is it better this way or this way???? "


I have come to the conclusion that you have to just read super slow and take your time trying to understand the fundamentals behind what each person is trying to say. If you can understand how each little thing actually works then you can start to read between the lines of what everyone is attempting to splurge out in posts.

 

I read super slow anyway. Not by choice though.

 

I have to ask.... other than blowing the tubes off, what are the risks, if any, with running the jet air to the charge tube. And vise versa, what are the risks with running it pre turbo?

I understand The purpose of using the check valve, but I do want to decide between hooking the jet air hose up post or pre turbo

The only advantage to pre turbo that I can come up with is that the jet air would get metered air as apposed to boost.

Im am pretty much posting this so someone can come in and confirm my thoughts

 

Pre turbo. Advantage: mine works. Post turbo: lets try yours and see what happens.

 

the insight from this guy is just caddywompus

 

Well all the new GReddy turbo kits have a spot for the Jet air POST turbo. That is where mine is connected and with this set-up I believe there is no need for a check valve in the line. Also I tied in my Wastegate signal to this hose so it accounts for all the losses through the IC, etc.

Also I have an oil catch can so oil in the intake should be a non-issue.