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Hks Ssq Adjustment

R34P3R

By R34P3R,
in Engines & Forced Induction

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R34P3R Experienced

R34P3R

Posted
Posted

hey i just got me a bov and was wondering what to adjust it to. it has a screw on it but im not sure what the difference between adjusting it to, to me loosening it make a hissing noise.

also when installed i rev it and hear 1 or 2 flutters from my pod but the bov opens at the same time. i know it opens coz i can feel the air on my hand [self reved from the engine bay]

thanks

also i have searched and after a reading "bovs are gay and blah blah blah" cant really find this info.

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vinnie32GTS4 Mentor

vinnie32GTS4

Posted
Posted
If it's a genuine HKS SSQV it doesn't have an adjusting screw in it as it's not required.

Cheers

Marty

only the new ones have no screw..the older ones do have a screw

turning it clockwise will set it harder and anti clockwise will set it softer...the more boost your running the harder you set it

Martin HKS Enthusiast

Martin HKS

Posted
Posted
i installed a new one and it would stay open for too long and lag my turbo heaps... the older ones must have been heaps better with the adjusting screws..

Care to explain this as by design it can't happen.

It has a spring to hold it closed under light vacuum and only opens under high vacuum from the manifold. So as soon as you start opening the throttle again it is closed. It shouldn't have anything to do with making the turbo's laggy. If the BOV vents while boosting there is deffinately something wrong.

Cheers

Marty

Rezlo Community Regular

Rezlo

Posted
Posted
Care to explain this as by design it can't happen.

It has a spring to hold it closed under light vacuum and only opens under high vacuum from the manifold. So as soon as you start opening the throttle again it is closed. It shouldn't have anything to do with making the turbo's laggy. If the BOV vents while boosting there is deffinately something wrong.

Cheers

Marty

I bet you he will tell you its between gears lag,

I fitted a new HKS to a customers S14 SR20DET / T04z, from working perfectly with his old $20 knock off it started to fall right out of boost between gears unless I flat shifted with the HKS, it was replaced with a another unit, same problem....ripped the HKS out and fitted a Greddy RS and presto, no more problems.

Craved Grand Master

Craved

Posted
Posted
I bet you he will tell you its between gears lag,

I fitted a new HKS to a customers S14 SR20DET / T04z, from working perfectly with his old $20 knock off it started to fall right out of boost between gears unless I flat shifted with the HKS, it was replaced with a another unit, same problem....ripped the HKS out and fitted a Greddy RS and presto, no more problems.

so your saying that a BOV that releases the pressure inside the the inlet piping on gear change isnt working correctly?

since thats exactly what they are designed to do im not sure where the issue is, there should be lag from a system running a BOV as the turbo re-pressurises the piping.

EVL-R33 Proficient

EVL-R33

Posted
Posted (edited)
Care to explain this as by design it can't happen.

It has a spring to hold it closed under light vacuum and only opens under high vacuum from the manifold. So as soon as you start opening the throttle again it is closed. It shouldn't have anything to do with making the turbo's laggy. If the BOV vents while boosting there is deffinately something wrong.

Cheers

Marty

Well personally I don't think the new SSQs work well under high boost pressure.

With my current setup i have a HKS 2530kai and im running over 20psi with supporting mods. When i run that much boost with the SSQ it would stay open for a second or two after gear change, and the air would go into atmo instead of back into the plenum..

I'm not sure as to why this happened (too much vaccum under high boost pressure for the SSQ to handle?), but it only happened with the SSQ and not with any other atmo bov that I owned.

I bet you he will tell you its between gears lag,

I fitted a new HKS to a customers S14 SR20DET / T04z, from working perfectly with his old $20 knock off it started to fall right out of boost between gears unless I flat shifted with the HKS, it was replaced with a another unit, same problem....ripped the HKS out and fitted a Greddy RS and presto, no more problems.

I've installed many atmo bovs and they all lagged my turbo in between gear changes (this is normal with atmo bovs).

Oh and I wouldn't have bought a bov if I intended on flat shifting 24/7.

Edited by EVL-R33
Rezlo Community Regular

Rezlo

Posted
Posted (edited)

Craved, I am quite aware of how a bov works, as I said, lag between gears on the new SSQV was terrible compared to the RS, obviously the SSQV is prone to staying open longer or has slower/buffered piston movement than other name brand bov's.

EVL-R33

With my current setup i have a HKS 2530kai and im running over 20psi with supporting mods. When i run that much boost with the SSQ it would stay open for a second or two after gear change, and the air would go into atmo instead of back into the plenum..

This is exactly what I am talking about, the SR20 in question was running close to 28psi and had an actual delay when shifting, knocks all the power out for a second or two like the bov doesnt close properly of fast enough,,, rip SSQV out and put in Greddy RS and presto no more problem... just regular minimal lag one expects from an abov...

has nothing to do with MAF either, all the cars I do now run VEMS or D-jetro.

In my opinion besides sounding retarded and looking gimiky the SSQV is just an expencive POS. Greddy, Tial or Synapse any day of the week for actual function which is what its there for.

Edited by Rezlo

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