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Just put in a new CAI on my 04 rx8 std tran 70k went with specter 3" all the way sound great, great throttle response, but when coasting around 4k rpm it gets jumpy and starts sputtering like a vacume leak but every thing checks out and when it starts sputtering and rev up to 5500rpm everything is fine and now i have a smell from exaust could this be my cat cleaning out i recently replaced my up flow 02sensor ?
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More specifically, you are having MAF sensor calibration issues as the Spectre unit is using the wrong pipe sizing.
Intake systems tend to not provide any performance benefit versus the factory intake but, if you MUST have an aftermarket intake system, use the AEM or Racing Beat units.
__________________ Do NOT send me a PM here. E-mail me at "Charles@BlackHaloRacing.com".
There are several members of this forum who were their own version of "retarded" in the past (and they may not actually be any more educated or experienced these days) and whom have learned many things from others around here. Those same people now repeatedly look down their noses with such comments toward new forum members who have not been around for the growth of this forum but the "noobs"/new members will certainly help in it's demise when they refuse to return and they, instead, spread the word as to how this forum has become not much more than a bunch of arrogant ********.
What is ironic is that IB's money is made from threads, posts, and views on this site but they have seen fit to appoint people as caretakers who are doing all they can to make sure those numbers gradually dwindle.
Quite disappointing, actually, as the RX8Club used to be one of the nicest and best automotive enthusiast websites on the internet.
__________________ Do NOT send me a PM here. E-mail me at "Charles@BlackHaloRacing.com".
Last edited by Charles R. Hill; 05-15-2012 at 10:36 AM.
.......... how to adjust the maf sensor or where to get a high flow maf sensor?
Neither is applicable here, especially when it comes to accomodating such aftermarket parts as that which you are using. The factory intake pipe is larger than 3" and you would simply be making matters worse.
__________________ Do NOT send me a PM here. E-mail me at "Charles@BlackHaloRacing.com".
First after much reserch and even more research i found out the reason that mainly AEM- CAI's are so sucsessful over other's and that making your own CAI is possibale and much more cheeper than buying one pre-fabed
1st The RX-8 air intake is actualy 3.25" inside diameter
2nd You can create any type of CAI as long as you don't go bellow 2.5" unless you
run 2 CAI lines only that you have to split after the MAFS
3rd The only exception is at the using the stock MAFS you have to maintain 3.25" ID and have at
least 2.5"' on either side of the MAFS the stock MAFS is calibrated to 3.25"ID
piping so using the 3" MAFS adapter is out of the question
4th The only way to get away without using the 3.25" ID MAFS tubing is to buy a
high flow MAFS or a jet flow mass air flow meter that comes with its own
tubing that its calibrated for and those run anywhere from $120 - $300 than
you might as well have bought the AEM CAI
I'm currently running 3" SS piping with the 7" spectre high flow filter and temporarily cut the MAFS tubing off the stock filter box to test the CAI I'll post some pic's before and after now I'm currently working on 1 solid Stainless Steel 4" pipe all the way into the bumper cover than SS piping down in front of the radiator with custom air scoop's underneath
Last edited by JimmyChristian; 05-16-2012 at 10:19 PM.
"but when coasting around 4k rpm it gets jumpy and starts sputtering like a vacume leak"
your running rich as hell, if you dident have a cat on your car it would be shooting 3 to 4 ft flames randomly that lasted around 4 or 5 seconds each. i did it. everyone from my local car meet was scared to follow me to close on a cruise when i had a specter under the hood.
So, after everything is said and done, what have you actually gained by using a Crappy Air Intake (CAI) on the RX-8?
From what I can see, you've gotten worse driving performance, and now you're even forced to cut up your stock intake in order to hope to get your car back to a drivable state while using your Crappy Air Intake (CAI), which means your car will never run as well as it was originally designed to.
So, why did you buy the Crappy Air Intake (CAI) in the first place?
The forum pretty much declared unless you have a turbo or supercharger that more air than the airbox provides is never needed. So you must have had some reason to install it other than performance reasons, because there aren't any performance gains to be had with a Crappy Air Intake (CAI) installed on a stock engined RX-8.
a lot of cool dudes will answer your questions accordingly 
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