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Unhappy with HKS Sound
- Thread starter Craighjr
- Start date
Kansei said:And I'm guessing you're sure it's a compressor flutter type of sound? Does it only do that at really low boost? I know the SSQV is sequential, so it has the primary and secondary valves.. maybe the sound you are hearing is the smaller (inner) valve?
Maybe so, all I can say is in vta I love the sound and it is what I wanted. Small valve big valve, they both make me smile in vta. So as mentioned videos! 1-3 are all on reserc. You hear a few vents some fluttery ones, some woosh ones. 4-5 are vta and much louder. The camera didn't move and the windows were still up for the second set. One thing I forgot to do was to put no insert in on vta and to see if I loose the awesome hks noise? Theres always today at work (spin). one
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And as always these are made on closed road in an industrial complex so no lectures about speeding.
the sound of the SSQV venting to atmosphere, even with the "low tone" purple insert, is so crazy, crazy loud that I have to be really careful driving around when I'm driving to class (I have to drive through the university of rochester campus all crowded with people to get to the RIT capus), or when I'm driving to work and I have to drive through little villages along the erie canal.. people are not very receptive of the noise lol
I also wondered about taking out the insert, definitely post a vid of that. If it makes it quieter or less of a loud whistle I'd definitely do that.
I also wondered about taking out the insert, definitely post a vid of that. If it makes it quieter or less of a loud whistle I'd definitely do that.
Craighjr said:Maybe so, all I can say is in vta I love the sound and it is what I wanted. Small valve big valve, they both make me smile in vta. So as mentioned videos! 1-3 are all on reserc. You hear a few vents some fluttery ones, some woosh ones. 4-5 are vta and much louder. The camera didn't move and the windows were still up for the second set. One thing I forgot to do was to put no insert in on vta and to see if I loose the awesome hks noise? Theres always today at work (spin). one
two
three
four
five
And as always these are made on closed road in an industrial complex so no lectures about speeding.
Since you have an intake, it seems like you would hear that over the BOV in RECIRC, mine honestly runs fine in vta, I have a little exhaust burp once and a great while, hows your?
You cant really here it in while its in recirc, is that cause your inside the car or it not very loud?Craighjr said:Maybe so, all I can say is in vta I love the sound and it is what I wanted. Small valve big valve, they both make me smile in vta. So as mentioned videos! 1-3 are all on reserc. You hear a few vents some fluttery ones, some woosh ones. 4-5 are vta and much louder. The camera didn't move and the windows were still up for the second set. One thing I forgot to do was to put no insert in on vta and to see if I loose the awesome hks noise? Theres always today at work (spin). one
two
three
four
five
And as always these are made on closed road in an industrial complex so no lectures about speeding.
i get some backfires and and i noticed that if i shift under 2k i dont have to give it gas i jsut disengage shift and engage clutch without gas and then it doesnt stumble....i think the stumbling happens because vta the turbo stays spooled between shifts and giving it gas might make u shake a bit because the car thinks its gona go ZOOM ZOOM.Ms3Xeoc said:I am also running VTA with the HKS. I love it! Seems to be no problems.
It is loud enough in reserc. I am only using a digital still camera to make the movies so the mic is less than optimum. Also shooting alone with the camera on the console doesn't help pick up the sound. In any case I have devised an insert that will modify the HKS fin and add my own reserc nipple. It should be cheap and easily repeatable if anyone is interested. I will have to shave down the plastic but that should be easy enough. The shop told me 10 to 12 week lead time. My best friend works there so I don't know if that's a joke or not. So my temp solution is to run VTA. Hopefully I will not burn up my cats in the mean time. I'm also starting a new thread about downpipes as I have yet to be impressed by what's out.AWDRACER6 said:You cant really here it in while its in recirc, is that cause your inside the car or it not very loud?
I am a dealer trained tech so I was always aware of performance and emmisions concerns with customers. This is what I have been tought and could be totally wrong. (There are guys from turbo xs on here who claim no ill effects, but my argument is such...) The modern cat is very efficent and fuel injection is also effecient. The cars are optimized for minimal raw fuel going into the cat. When the cat sees too much fuel it will get too hot by burning that fuel causing decomposition, break down and then clogging. My wrx lost a coil wire and ran with a dead miss. In the 5 minutes of driving to safetly get the car off the road the manifold on cyl 3, uppipe (which has a cat), turbo turbine side, and first downpipe cat were all glowing red. When I put in a catless set up shortly after that my cats were both showing signs of decomposition and breakdown (at 30k mi). So imagine a shot of raw gas on every shift. I don't know how long it takes, but I need my cat every 2 years for emmisions and don't want to have to buy a new one to pass.clos561 said:how long does it take to burn ur cat up? ive been running mine vta for a week now....how can u tell if ur cats are ******* up
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That s*** is loud! Thats tight! I didnt know it was that loud. How much of a difference is there when its recirc? U know?clos561 said:
i dont have cai and u cant hear it at all.....its so much louder in person....but yea with cai ppl have heard some bov soundAWDRACER6 said:That s*** is loud! Thats tight! I didnt know it was that loud. How much of a difference is there when its recirc? U know?
i cant adjust this oneshadow1 said:If the HKS BOV is fluttering you need to adjust the spring. The HKS SSQV is very sensitive to proper spring adjustment. Fluttering at high boost can be bad since it often means compressor surge.
Ok, this is just pure horseshit. Youre NOT going to burn your cat up unless youre running 9.5 or lower at your A/F ratio. If you want to talk about a rich running motor, take a look at my Lightning. It has a fuel system that supports 1100 hp, 3 fuel pumps, a kenny bell blower pumping out 18 psi on the street, backed up by meth injection. On the street i run a conservative 10.8 AF... mild street program runs 11.1... race settings are 12.1 on 114 octane. Five years, 1400+ 1/4 passes and 59,000 on the odometer, the cats and exhaust are fine.
A BOV isnt going to cause that severe of a rich condition. Hell if anything, venting to the atmosphere is actually going to LEAN you out when you bring in unmetered air. Some tuners used to place a vent filter to the valve cover on the lightnings in the earlier years of tuning.. They would have to adjust for it because of the unmetered air bumping the a/f .4 to .6 above what the dyno run would put out.
For the dude who is or was a dealer mechanic, things have changed since you have been trained, esp with boosted motors... Its either time you learn how it works or just stay out of these threads. Youre giving out information that isnt factual and based off knowledge of non forced inducted vehicles which have no merit to this type of car.
If you want to burn out a cat, run it lean... If you dont believe me, go talk to the Sub STi Race team who had to goto magnaflow to get a special cat made for their race cars to solve the problem. Running rich 10.5 and above isnt going to do a damn thing to it. MOST boosted cars from the factory run 10.2 to compensate for high altitudes amd high heat climate areas.
A BOV isnt going to cause that severe of a rich condition. Hell if anything, venting to the atmosphere is actually going to LEAN you out when you bring in unmetered air. Some tuners used to place a vent filter to the valve cover on the lightnings in the earlier years of tuning.. They would have to adjust for it because of the unmetered air bumping the a/f .4 to .6 above what the dyno run would put out.
For the dude who is or was a dealer mechanic, things have changed since you have been trained, esp with boosted motors... Its either time you learn how it works or just stay out of these threads. Youre giving out information that isnt factual and based off knowledge of non forced inducted vehicles which have no merit to this type of car.
If you want to burn out a cat, run it lean... If you dont believe me, go talk to the Sub STi Race team who had to goto magnaflow to get a special cat made for their race cars to solve the problem. Running rich 10.5 and above isnt going to do a damn thing to it. MOST boosted cars from the factory run 10.2 to compensate for high altitudes amd high heat climate areas.
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