STILLEN Hi-Flo intake pic's
Registered User
Joined: Sep 2004
Posts: 139
Likes: 0
From: Austin, Texas
Originally Posted by rase-r
I have the Stillen intake, and it does not whistle at all. I think you got a leak some where. I would check all the connections again.
The Stillen is very quiet, because of the inclosed filter box.
The Stillen is very quiet, because of the inclosed filter box.
If it has absolutely no whistle/suction noise, then you may want to check and make sure the clamp holding the filter and intake tube together is tight.
Not in order to try and get the noise, but just to make sure it's not way too loose like mine was (you could spin the clamp with your hand). That clamp being loose is a much bigger problem than any noise you'd be hearing.
Registered User
Joined: Dec 2004
Posts: 83
Likes: 0
From: Beaverton OR
Originally Posted by spill
If it has absolutely no whistle/suction noise, then you may want to check and make sure the clamp holding the filter and intake tube together is tight.
To me:
suction noise = no leak,
whistle = small leak some where
All 4 of my cars have large K&N cone filters. 2 JWT pops, 1 place racing CAI, and the Stillen, None whistle.
My experience with the Stillen intake is that it does whistle, but it was only audible with the windows down and under light acceleration from around 2.5k rpms to 4k rpms. Under hard acceleration all you get is a roar and I didn't notice any whistle when just cruising at highway speed. For the guys with no whistle: do you have a 350Z tube as well?
never heard anyone complain about the sound of the stillen intake on here. unless your just referring to the sound it makes as a whistle and you dont like it you most likely fudged up during install. but other than that i love my intake. top it off with z tube and upper pleneum
The whistling sound at part is common with all types of cone intake. I know the exact sound because my Maxima did it, my 94 Z28 did, and just about any other car I've riden in with a cone intake does it. It has nothing to do with improper install. The sound you're hearing is coming from the throttle body and throttle blade. The sound is not some loud high pitch whistle. It's very low pitch and pretty faint.
Registered User
Joined: Feb 2005
Posts: 44
Likes: 0
I have the stillen CAI w/the Z tube and i have noticed the whistle at around 2.5k rpms to 4 k rpms...and im pretty sure it is installed properly, cause i had it installed by my dealer, and got them to doubble check to make sure there were no leaks after the install because i did notice the whistling..they claimed that the whistling noise is normal...im glad to know that im not the only one on here that has noticed this whitling noise.
Registered User
Joined: Sep 2004
Posts: 139
Likes: 0
From: Austin, Texas
.... right. I didn't mean to infer that you should hear a whistle like you're whistling youself .... just a small "whistle'ish" sound like a blowoff (just on the opposite side of throttle usage obviously) when you hit the throttle, and usually only when you initially hit the throttle.
And yes, you would have to have your windows down and nothing else in the immediate area to hear it anyways.
And yes, you would have to have your windows down and nothing else in the immediate area to hear it anyways.
Originally Posted by spill
.... just a small "whistle'ish" sound like a blowoff (just on the opposite side of throttle usage obviously) when you hit the throttle, and usually only when you initially hit the throttle.
Guest
Posts: n/a
- reserect a dead thread? - I too just installed a Stillen CAI and I get the whistle at around 1/4 throttle. Rev-range varies depending on gear, but usually around 2.5k.
My modding approach is to keep it stock-like (sleeper), and go for cost-effective mods. I do want to get it sounding tougher, but the refined burble-side not the raw throaty kind.
I have a '03 G35 sedan with z-tube. I installed the stillen and got the whistle, I just installed the plenum spacer and the whistle is the same (mabe a touch quieter).
I am on-the-fence- right now about the stillen. I don't like the whistle, but it is usually only for a short time during normal driving (even less under aggressive accel), and barely noticable with the windows up.
The stillen sounds almost stock at low revs (up to ~2-3k), then it gets a (whistle) nice grumble, that grows to a growl, then as you go WOT, it roars. To my liking, it is too loud on WOT.
According to Cato, his tamed down a bit when he added the HKS end-pipe (muffler). I don't know why Cato doesn't have the whistle (had your hearing checked?
Cato, you want to hook-up sometime and compare sounds? I am curious.
So I am going to drive it for a few weeks and then drop in an end-pipe. Then see what the sound is like.
My modding approach is to keep it stock-like (sleeper), and go for cost-effective mods. I do want to get it sounding tougher, but the refined burble-side not the raw throaty kind.
I have a '03 G35 sedan with z-tube. I installed the stillen and got the whistle, I just installed the plenum spacer and the whistle is the same (mabe a touch quieter).
I am on-the-fence- right now about the stillen. I don't like the whistle, but it is usually only for a short time during normal driving (even less under aggressive accel), and barely noticable with the windows up.
The stillen sounds almost stock at low revs (up to ~2-3k), then it gets a (whistle) nice grumble, that grows to a growl, then as you go WOT, it roars. To my liking, it is too loud on WOT.
According to Cato, his tamed down a bit when he added the HKS end-pipe (muffler). I don't know why Cato doesn't have the whistle (had your hearing checked?
Cato, you want to hook-up sometime and compare sounds? I am curious.
So I am going to drive it for a few weeks and then drop in an end-pipe. Then see what the sound is like.
Guest
Posts: n/a
Here's some sound clips...
I have '03 G35 sedan 5AT.
Recordings were done on a laptop, 1ft from front bumper on the driver side (in garage).
<a href="http://www.conachers.com/G35Driver/Car_files/pre_ztube20050625.wav" title="Pre_Z-Tube"> 1st clip (pre_ztube): stock, no mods</a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/post_ztube20050625.wav" title="Post_Z-Tube"> 2nd clip: z-tube installed</a><br>
Next: (stillen CAI and plenum 3/8 spacer installed)
<a href="http://www.conachers.com/G35Driver/Car_files/ztube_stillen_spacer.wav" title="Z-Tube, Stillen CAI, 3/8 spacer installed"> 3rd clip: After Stillen CAI and spacer installed on the same vehicle (+ztube)</a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/rear_ztube_stillen_spacer.wav" title="Rear: Z-Tube, Stillen CAI, 3/8 spacer installed"> 4th clip: Same as above, except from the rear of the vehicle (After Stillen CAI and spacer installed on the same vehicle (+ztube))</a><br>
I didn't hit exactly the same rev-ranges, but I think the difference is quite noticable - especially from stock to the ztube, plus stillen, plus spacer - the spacer sure did deepen the note, and the stillen makes it grr..roar above ~3,000.
I tried to get the "whistle" sound from the CAI, but it is not apparent in this recording - will try another one later - already pissed off the neighbors reving the crap outta the Gee
I have the HKS rear-section muffler on order, so that's why I did the rear sound-clip. Will post after that's installed.
OK, I finally got around to recording the HKS sport muffler. Here y' go...
<a href="http://www.conachers.com/G35Driver/Car_files/rear_hks20050930.wav" title="Rear: Z-Tube, Stillen CAI, 3/8 spacer, HKS sport muffler installed"> 5th clip: From the rear of the vehicle (After Ztube, Stillen CAI, spacer, HKS muffler installed on the same vehicle )</a><br>
OK, here's some more clips from inside the car (under "load" as suggested )
<a href="http://www.conachers.com/G35Driver/Car_files/inside_1_4_1.wav" title="Inside the car 1-4th Auto"> 6th clip: From inside the vehicle </a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/inside_1_4_1a.wav" title="Inside the car 1-4th Auto"> 7th clip: From inside the vehicle "under load" (auto) </a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/inside_1_4_2.wav" title="Inside the car 1-4th Auto"> 8th clip: From inside the vehicle "under load" (manumatic shifting) </a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/inside_openwin1_4_3.wav" title="Inside the car 1-4th Auto"> 9th clip: From inside the vehicle "under load" WITH THE WINDOW DOWN - lots of wind noise - but pretty cool! </a><br>
OK, added a Coupe mid-pipe - here's sound clip from rear of the vehicle. The sound clip didn't record very well - it sounds better in person - right Cato?
<a href="http://www.conachers.com/G35Driver/Car_files/rear_midpipe20051021b.wav" title="Coupe mid-pipe from Rear"> 10th clip: After coupe mid-pipe installed </a><br>
Enjoy!
I have '03 G35 sedan 5AT.
Recordings were done on a laptop, 1ft from front bumper on the driver side (in garage).
<a href="http://www.conachers.com/G35Driver/Car_files/pre_ztube20050625.wav" title="Pre_Z-Tube"> 1st clip (pre_ztube): stock, no mods</a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/post_ztube20050625.wav" title="Post_Z-Tube"> 2nd clip: z-tube installed</a><br>
Next: (stillen CAI and plenum 3/8 spacer installed)
<a href="http://www.conachers.com/G35Driver/Car_files/ztube_stillen_spacer.wav" title="Z-Tube, Stillen CAI, 3/8 spacer installed"> 3rd clip: After Stillen CAI and spacer installed on the same vehicle (+ztube)</a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/rear_ztube_stillen_spacer.wav" title="Rear: Z-Tube, Stillen CAI, 3/8 spacer installed"> 4th clip: Same as above, except from the rear of the vehicle (After Stillen CAI and spacer installed on the same vehicle (+ztube))</a><br>
I didn't hit exactly the same rev-ranges, but I think the difference is quite noticable - especially from stock to the ztube, plus stillen, plus spacer - the spacer sure did deepen the note, and the stillen makes it grr..roar above ~3,000.
I tried to get the "whistle" sound from the CAI, but it is not apparent in this recording - will try another one later - already pissed off the neighbors reving the crap outta the Gee
I have the HKS rear-section muffler on order, so that's why I did the rear sound-clip. Will post after that's installed.
OK, I finally got around to recording the HKS sport muffler. Here y' go...
<a href="http://www.conachers.com/G35Driver/Car_files/rear_hks20050930.wav" title="Rear: Z-Tube, Stillen CAI, 3/8 spacer, HKS sport muffler installed"> 5th clip: From the rear of the vehicle (After Ztube, Stillen CAI, spacer, HKS muffler installed on the same vehicle )</a><br>
OK, here's some more clips from inside the car (under "load" as suggested
)<a href="http://www.conachers.com/G35Driver/Car_files/inside_1_4_1.wav" title="Inside the car 1-4th Auto"> 6th clip: From inside the vehicle </a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/inside_1_4_1a.wav" title="Inside the car 1-4th Auto"> 7th clip: From inside the vehicle "under load" (auto) </a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/inside_1_4_2.wav" title="Inside the car 1-4th Auto"> 8th clip: From inside the vehicle "under load" (manumatic shifting) </a><br>
<a href="http://www.conachers.com/G35Driver/Car_files/inside_openwin1_4_3.wav" title="Inside the car 1-4th Auto"> 9th clip: From inside the vehicle "under load" WITH THE WINDOW DOWN - lots of wind noise - but pretty cool! </a><br>
OK, added a Coupe mid-pipe - here's sound clip from rear of the vehicle. The sound clip didn't record very well - it sounds better in person - right Cato?
<a href="http://www.conachers.com/G35Driver/Car_files/rear_midpipe20051021b.wav" title="Coupe mid-pipe from Rear"> 10th clip: After coupe mid-pipe installed </a><br>
Enjoy!
Last edited by andycon; Oct 21, 2005 at 05:43 PM. Reason: added more sound files
Former G35driver Vendor
iTrader: (23)
Joined: Jul 2004
Posts: 3,054
Likes: 85
From: Los Angeles California
I have the Stillen CAI and its loud but I've never heard it whistle. The closest I've heard is when the pedal is stabed or for a fraction of a second when the engine is shut off. But certaintly never a steady state whistle.
I kinda wish I could hear this whistle sound. It's got me curious.
I kinda wish I could hear this whistle sound. It's got me curious.
Registered User
Joined: Jul 2005
Posts: 41
Likes: 0
Originally Posted by Eddie23
Whistle: don't have the clip but trust me it's irritating. If it would be at WOT, it would sound mean but it's only at mid open throttle. PimpG35, it's not rpm dependent but throttle dependent. Sometimes when you have to have the gas pedal halfway down to just keep a constant speed on the highway, you get the whistle continuosly 
Shutting off: I got it also, after long highway driving at ca. 125 mph, when I hit the clutch, the rpm drop so low that the car stalls. I don't know however what is the additional role of the grounding kit in it (rpms dropping quicker after I installed it)
So much for that matter. I'm getting my K&N next week and replacing the stock box.
Shutting off: I got it also, after long highway driving at ca. 125 mph, when I hit the clutch, the rpm drop so low that the car stalls. I don't know however what is the additional role of the grounding kit in it (rpms dropping quicker after I installed it)
So much for that matter. I'm getting my K&N next week and replacing the stock box.
Random question??? Why are you leaving your foot on the clutch at 125 MPH?? I would say put the car in gear and let the clutch out, should do the trick...