I got one of those CAI’s off eBay and installed it perfectly and it works perfect and sounds even better, but when I have my foot lightly on the gas it makes a whistle sound or a squeal sound… nothing bad in fact it sounds good, but I want to make sure that that’s normal?

Not very loud at all with the driver window up I can’t hear it.

 

its normal...mine whistles when gas is slightly pressed also...enjoy the sound..

sabe

 

I was wondering about this myself... you only hear it when you're actually moving. If you're in park and you give it the same type of light gas, you don't hear the whistle. Always wondered about it, but I guess if others have it too, it's normal.

 

I just noticed this with my injen last night, the only thing with mine is when I give it more gas the sound is higher pitched, is that normal? It doesn't happen in park.

 

I know man what's up with that (I have an Injen cai) yes it whistles too
oh well ...

 

normal. most, if not all aftermarket intakes whistle

 

my frankencar does at the right throttle posision

 

most CAI's whistle.

 

ya got that right

 

which CAI did u get, apeg?

 

my Hybrid whistles, only because of the mid pipe. If you don't want the whistle just replace the mid pipe with the original resonator. (intake will not be as loud)

 

No clue on the brand, got it off eBay for about 50 (I think) the pipes and filter came in the mail all in bags and that its... no papers at all... hell I didn’t even get that template that most of them come with LOL.. But I got what I paid for ;-)

 

yes but don't you loss your low end power?

 

well did you manage to find a copy of the template?

 

Theres no low end power to begin with...

only place I felt diff. with my frankencar was shift to shift, engine respoded alot better

 

Same Ebay CAI. I get my whistle in the 1700 to 1850 rpm range. Rule of thumb, the faster the air velocity and the lower frequency the the harmonic (whistle) the more efficent the flow. The perfect intake / exhaust would produce no sound.

 

the intake whistles while moving because its the air flowing into it... moving at through a small space whistles (open a window a crack when its windy out) then ur in park or standing still, it pulls it air, but wont do it at those low RPMs

 

I just bought, most likely, this same one. Where did you get a template at or what did you do to install it?

 

think that only applies at WOT. maybe thats why VIM makes the intake alot smooth and quieter tone

 

Hmm...maybe your car is broken.

As for the whistle...I'm curious if anyone's done any investigating...is it the pipe wistling or is it air coming through the cracks in the fender well?

 

cant be the fender since HAI's whistle too.

 

Hmm...I didn't know HAI's whistle until I (re)read this thread. Oh well, I guess that solves that one

 

Nope i used the tutorial on this website and eyeballed it... there were a couple screw holes that the picture had that i kinda lined up my drill saw with.... worked perfect... kinda risky ;-)

 

I want to say the butterfly makes the noise. Think of it this way, it's open, but not much, so the air hits it and gets bounced around. Or could it be the TB itself? When the stock resonator is on the whistle goes away and all the resonator really does is quiet the intake, so either way the whistle was and is always there. It all depends if you can hear it.

 

are the CAIs from procarparts any good? I thought about buying one of those or going with the Frakencar CAI...What do you guys think is better?

 

I believe the one that apeg bought is the procarparts one. It is the one that I bought. I haven't gotten it yet but hopefully it wont be a total piece.