TeamRX8

iTrader: (25)

you no more comprehend proper English than you can write it. My edit only changed from me initially calling you clueless to saying you don’t know what you’re talking about; i.e. a change in tone and intent, not a change of position.

you didn't understand my previous comment because you overlooked the context despite me specifically laying it out. A race engine doesn’t need to be concerned about economy or emissions at idle and low rpm/low velocity intake flow. Because that’s the only time that the jet air device has any useful function; to provide flow velocity across a specific part of the primary intake port when it otherwise doesn’t exist.





You’re a very special kind of dumb. I suspect most of it is your lack of proper English skills. Which you keep insisting you’re a master of. Therein lies the root issue; you believe yourself skilled and knowledgable about things you’re not. You keep insisting that mole hills are mountains, which in my experience indicates someone who’s book smart, but has no real practical experience/knowledge. This is demonstrated in all your postings thinking you’re making all these improvement changes. If it makes you feel any better I used to be the same way ... 40 years ago. Maybe you’ll eventually get there too.

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TeamRX8

iTrader: (25)

well you have to understand my context, which is the racer perspective. For a street car you should keep it and the AEM is ok for that purpose, but I build my own intakes for a specific purpose. I’m sure you can comprehend that a whistle results from high velocity over a specific nozzle configuration; whether it’s a teapot, or an actual whistle you blow with your mouth, or using your fingers in your mouth to blow across. Mr. Special doesn’t comprehend that he slowed the velocity down with a restriction, but it also reduces flow to the jet air nozzle. Which is counterproductive to why it’s there per my previous post. My solution to install a larger connection reduces velocity of the air entering into it, but not the flow potential.

I understand that not everyone can just weld a larger connection on there and adapt the hose to it, but it would be an effective solution to the actual problem. So there are multiple connections on the intake tube and it really doesn’t have to be in any special arrangement as long as the hoses have sufficient length to make the connection. So one thing you can try to do is move the jet air hose to one of the other connections and see it that helps.






The other thing is that you might look into the connections and that tube section to see how the openings look. If it’s like I mentioned having seen some in the past; just a smaller hole drilled through after they welded the connection end on, or squared edges, etc. then maybe you can get a porting carbide burr cutter or sand roll bit to hog that out to the full size and smooth the edges off to help reduce the condition that generates the whistle sound frequency.


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Sketchy_RX8

Thank you @TeamRX8 & @Heisen Delgosha ?!?!? But, @TeamRX8 That pefecetly explained what I needed to know I've also been putting in time personally into further research and it's something I am considering due to 1. how I drive . 2. I go to mexico... Alot. 3. I used too autoX before corona anyway pretty regularly... But, anyway I just wanted to say thank you for helping me fine tune my understanding ya'll cute btw jkjk lol N>O>

motodenta

Who talks about jet air ?
Mr. proper English go back and read all of my comments from beginning to end.
Obviously you are wrong like always as you don't remember what a OEM engine looks like,
cause most of noise is made by Oil Injector air feeds.

Your car might be for race and you might burn or hitting wall with 200km/h thats your business,
any manipulation in air lines would cause imbalance in engine works and need a ECU tune.

TeamRX8

iTrader: (25)

that’s even worse then, but you really just have no clue because mine has never made any whining sound in over 15 years of doing this

I wouldn’t know anything about ECU tuning either, you’re a real gem.





just so we’re clear; whether it’s the jet air or OMP line; which I already told you was messed up in the thread where you detailed your mod of those lines too, you’re messing with things you haven’t measured or determined the actual impact of it under all operating conditions and then telling other people to do it. When you’re messing with the OMP system then that could have consequences. I’ve seen a lot of people come and go on here over the last 15 years with their potions and feel-good scientific approach. Probably even guilty some myself back in the early days. More often than not they just disappeared and nobody really knows much other than when those people were talking it up like it was the greatest thing ever, but never had any proof of anything. Just their feel-good blah-blah-blah.

I never heard one whine that loud really, even with an AEM intake. Of course a race engine is a different story. You can plug it all up and pre-mix, which we had people on here back in the day promote that as death to the Renesis despite pro builders and race series cars doing it for years. So you get all kinds of stuff on here and getting the straight answer isn’t always clear. If I had my druthers for the average street RX8 though, I’d take a properly operating OMP system over anything else, including whining/whistling noise.

Just for the record though, here is the correct OMP oil injector nozzle test out of an actual 2005 RX8 paper manual. The online pre-production manual is not complete for this test or many other things. That’s why I keep warning people not to use it and to go buy an actual paper manual from Mazda






and here is the functional intention of the system. Note that the internal check valve is for oil, not air flow





The system is designed to function in a very specific way. If you start messing with that all bets are off. For your own engine, fine. Take your chances. You might think twice before chancing someone else’s motor though. But then maybe not since it’s no skin off your back. That’s kind of my point.

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TeamRX8

iTrader: (25)

so I’m not sure how valid it might be to try and modify an AEM style intake using something like this aftermarket silicone setup instead



(photo compliments of NorCalEights Racing Beat Intake FS ad)

motodenta

If I have time to set up a mic to make clear what's going on,
feel free to put a silicone hose to the intake with a vacuum gauge to monitor the engine behaviour.
Unfortunately I am way bussy and normally won't do the same experiment twice in aske of spoon feeding.