| Hilbe |
| Does anyone with a Injen or similar CAI hear a whistle sometimes? It seems to happen at weird places, not necessarily when I stomp on the accelerator. I have all my clamps tight as they will go and I'm pretty sure there aren't any leaks. Just curious if this is normal. |
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| Hilbe |
I forgot to mention this is a different sound then the sucking sound from when I do stomp on it....
I have a feeling it may be the vacuum hose. |
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| Whispaz |
| yup. It usually happens when I lightly press on the gas or at the begining of most accelerations. it'll whistle for as long as I keep it in that area |
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| Lightninrod |
You ought to hear the CAI/Supercharger whistle/scream on my 2001 F150 Lightning...sounds like two Everglades panthers at the peak of love-making when I go to WOT:D .
Dan |
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| Hilbe |
| It seems to only happen when in drive around 1500 to 2500 rpm. I put in in park and stomp on it and its quiet. Any idea what I can do to get rid of it (outside of taking the CAI off)? I was wondering if a better filter would do the trick. Right now I'm running the included Injen cone filter. |
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| Hilbe |
| Shortened the rubber hose Injen included by 1 to 1.5 inches and moved the hose clips down a tad. The hose was a tad long so hopefully shortening it helps... |
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| Nathan @ NBO |
| That fixed it? I used to always have a whistle on my CRX at certain rpms, never figured it out but knew that it's a common occurence. Are you using a breather or is the tube connected directly to the valve cover? |
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| Hilbe |
| I don't think it helped. It may be the filter itself. I am debating getting a filter like the one on my Maxima. It doesn't whistle at all. |
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| Tyler_Canada |
| My guess would be it's the sound of air going past the metal wires that hold the cotton gauze in place. My JWT does it too. You can only hear hear it at certain times because at others there isn't enough airflow (idle) or there is too much other noise. You won't hear it by stepping on the gas in park, because even though the RPMs go up, the airflow is still quite small (not much power needed to rev an engine by itself). |
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| Hilbe |
quote:
Originally posted by Tyler_Canada
My guess would be it's the sound of air going past the metal wires that hold the cotton gauze in place. My JWT does it too. You can only hear hear it at certain times because at others there isn't enough airflow (idle) or there is too much other noise. You won't hear it by stepping on the gas in park, because even though the RPMs go up, the airflow is still quite small (not much power needed to rev an engine by itself).
My Maxima has a Fujita CAI and it came with a Fujita filter. The Fujita filter has a slightly different design than the Injen filter. Its quiet as can be with the Maxima. See the below link for pictures.
http://cgi.ebay.com/ebaymotors/FUJI...79322QQtcZphoto
I am debating picking one of these up and replacing my Injen filter with it... |
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| Whispaz |
| Mine is a K&N filter and it whistles. I dont think thats it |
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| srtinnovations |
I have had a few different types of vehicles with CAI's NA and Turbo charged. Guys, the whistling noise you hear your CAI's make is normal. That is the flow of air through the aluminum CAI and through the throttle body plate. The reason you only hear the whistling at certain low RPMs is due to the CAI allowing substantionally more air through the throttle body plate while it is only opening slightly, which causes the whistle noise.
I have tried using CAI's made out of aluminum, plastic, and rubber. The only way of completely eliminating the whistling noise while using a CAI on your vehicle is to get a CAI that is made out of plastic or rubber. Aluminum CAI's will always make the whistling noise with your throttle body plate. |
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| njjoe |
quote:
Originally posted by srtinnovations
The reason you only hear the whistling at certain low RPMs is due to the CAI allowing substantionally more air through the throttle body plate while it is only opening slightly, which causes the whistle noise.
You really don't believe that, do you. You think the CAI allows substantially more air? If it was substantial you would see significant performance gains. The incremental air volume is minimal at best, especially at low rpms.
-njjoe |
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| srtinnovations |
You are not going to see significant performance gains on any NA engine vehicle just by putting a CAI on it. On some NA vehicles they can actually get between 0 - 7 horsepower gains at the most. If you put a CAI on a Turbo or Super charged vehicle you can any where from 5 - 20 horsepower. I had a 2004 Dodge SRT4 turbo that was stock and dynoed @ 230 hp. I added a AEM CAI and dynoed again @ 245 hp. That is 15 hp gained just by a CAI. My friend had a 2003 Dodge SRT4 with a Mopar Stage 3 Turbo kit and he got a 20 hp gain from putting a CAI on his car.
My point is a CAI will allow more air flow, ok maybe not substantially more for a NA vehicle like I mentioned before. But it will allow more air to come into the throttle body. If you want to make any vehicle to have significant performance gains you need two things, more air and more fuel to get into the engine. SIMPLY ADDING A CAI IS NOT GOING TO MAKE A HUGE HP INCREASE ON A NATURALLY ASPIRATED VEHICLE. |
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| njjoe |
srtinnovations-
I agree. By the way, welcome to the forum!
-njjoe |
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| Hilbe |
| The Maximas are seeing around 12 to 14 whp from the CAIs. Same engine essential...I have compared my Maxima to my Murano :) Both my vehicles now have CAIs one them... |
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| o6murano |
quote:
Originally posted by Lightninrod
You ought to hear the CAI/Supercharger whistle/scream on my 2001 F150 Lightning...sounds like two Everglades panthers at the peak of love-making when I go to WOT:D .
Dan
We discuss NISSANS, not Fords. |
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| Lightninrod |
Well, I have both.
This thread is about CAI noise so I thought I'd mention the very loud CAI noise that the supercharger and its CAI on my L make, the reason being, there are vehicles that make much more noise.
Sorry if that got you upset. :1:
Dan |
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| Hilbe |
| Well, I just installed the Fujita 3 inch filter on my Murano (similar to the Maxima model). There is a lot less whistle with the new filter, but there still is a whistle. I might play a little more with the tub connection at the throttle body to see if that helps... |
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| davpx |
| I use an OTTO-R CAI w/ K&N Filter and I get the whistle too. I agree with the theory that the throttle body is making the whistle due to more air flowing through it. The theory is sound in my mind. |
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| moforose3 |
| Its proabably not the throttle body, but the intakes. Try a JWT they are pretty good without the whistle (on my Z anyhow). |
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