Idiling Question

[I8U]

Originally Posted by ScreaminRX8

I8U, I thought so too, even though it idled smoother. Now with it around 800-900 it idles rough at times. I am thinking though after the 30,000 service with the new plugs and all it will run and idle better. I will tell you since I took the cone and baffels out of the airbox it runs and idles better and gets better gas mileage. I figured the reason for that is it is getting more air.

Mine ran a little better when I did the same mod but I have recently installed a K&N Typhoon V2 intake and the HKS Hi-Power exhaust...idle seems to be better but I think my coils are going out again. I'll make a thread about that though...that is a pretty long story.

[Herblenny]

Originally Posted by ScreaminRX8

I will tell you since I took the cone and baffels out of the airbox it runs and idles better and gets better gas mileage.

Whats this cones and baffels thing?? I'm an 8 newb.. I'm now experiencing so called "flooding" and I hate the 8!!! I want to sell it and pick up an Accord

[fikren]

Originally Posted by Herblenny

Whats this cones and baffels thing?? I'm an 8 newb.. I'm now experiencing so called "flooding" and I hate the 8!!! I want to sell it and pick up an Accord

There are a couple of things you can do phil, not sure which if both they are refering too. There is one mod that you remove two plastic "walls" inside the air box. If you open your air box up, around the hole on the top of the box on the inside are two walls that theoretically can block air. Both walls are held in by two screws. Remove the screws on each side and remove the wall and your done. Opens it up very similar to the RB air box.

You can also remove one if not both of the screens in there also BUT there is some debate on if this is a good deal or not. The screens are there to straighten air flow to my understanding and are there by design from mazda. Some claim it helps but others claim that it has hurt idling.

Idling problems have occured with several types of aftermarket intakes. I think I8U is running the typhoon v2 but if I recall the V1 gave people lots of problems. Has to do with how the air ends up hitting the filter shape and is why RB went with the type/style filter in their setup.

I think there can be arguments either way on wheather to go aftermarket or mod your airbox. I think removing the walls is something that can be done without problems, people say it makes the sound alittle louder so they may have just been there for resonance purposes. I however at this point am not planning (other than possibley the wall removal) to do any type of intake replacement. To me the gains (possible 1-2hp above 7k rpm) are not worth the risks (poorer idle, noise, possible engine warranty void). Hope this helps Phil maybe the others can chime in on what mods they have done or their thoughts on aftermarket intakes or modified intakes.

Edit: you will also want to do an ECU reset whenever you do any mods to your intake.

Jonathan

[ScreaminRX8]

I was refering to the two "walls" as fikren was talking about and the cone is the tube that has a screen in it and when the box is closed it fits fluch against the filter, which has three screws holding it in. Once taken off it looks like a cone. I really can't tell that it is that much louder. The only reason I tried this is for better idling and better fuel mileage. It has definitly helped with the idling issue, but it has only improved my mileage by 1 or 2 miles to the gallon. I will personally re-install these items before I carry it back for my 30k service. Not sure yet if I am going to take them back out after.

Originally Posted by fikren

You can also remove one if not both of the screens in there also BUT there is some debate on if this is a good deal or not. The screens are there to straighten air flow to my understanding and are there by design from mazda. Some claim it helps but others claim that it has hurt idling.

I am not saying that they didn't put it there by design, some things are designed in because of regulations. If they have to do anything like we have to at Harley-Davidson to meet emission (EPA regulations), things like this are put there for that reason. Companys also have to meet noise regulations and this may be the case for the "walls" in the airbox. I am still learning about the rotary but I would think that it is like any other engine with fuel and air ratio's. On Harley engines you can introduce more air and it runs much better but if you add more air and open up the exhaust is when you need a new ECM flash. The main reason for the flash is the computer is trying to compensate for the extra air and less back pressure. They are so bogged down to meet all of these regulations for the different countries.

[Renesis]

i had to do the ecu reset after i installed my knock off aem ebay intake.

my idle isn't that bad it's just a bit rough but now i have a huge flapping sound in my intake that only happens when i accelerate while driving, not reving and not in neutral.

[Renesis]

ahh yeah i had the reflash done (haven't been on in awhile) my idling is alot better