i recently got a new hks ssqv BOV for my evo 8 but it came off of a skyline r-34, or so im told, i do not think that the spring in it is the right one for the evo * it seems really weak and the engine will not run properly with it on, the engine almost dies, due to loss of pressure, NEED THE PROPER SPRING FOR THE EVO 8, CAN ANYONE HELP???? ANY IDEAS AS TO WHERE I CAN GET THE RIGHT ONE? PLEASE E-MAIL ME IF YOU HAVE ANY INFO THANKS. RYAN

 

*sighs*

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Are u venting out to the air? If so, are u running speed density (MAP)? As far as I know, the SSQV doesnt have multiple springs application. It's universal for all cars. If you are running on the STOCK MAF sensor and venting the bov, then that's ur problem. YOu need teh recirculation kits.

 

there's is a thread some where about these bov's... from what was posted from a member who e-mail'd hks.. all of there bov's are universal. I think the only difference is the fact that if you buy an evo specific kit. it comes with it's owns special adaptor. the adjustment nut on top of the bov only adjust how quick the bov opens, and besically you don't really need to mess with it unless your having a problem. the nut should be adjusted about halfway out. if you adjust it to far in (I think) you can puncture the diaphram inside of the BOV. hope this helps. and anyone else that would like to add to this please do. I have this bov recirculated and I've had no problems with it besides the occasional stumble that happens when you press in the clutch and let the car idle down.

-Chad-

 

Like I said above (the very first link I posted, actually)....

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As long as the engine vacuum isn't drawing it open at idle, it should idle ok and not stall, but not recirculating could lead to stalling issues.. If you find your engine vacuum causes it to always be leaking, you will have to increase the tension on the adjuster slightly (it doesn't have any "alternate springs") so it stays closed.. Please keep in mind that everything comes with a compromise, you may get compressor surge at low load driving.. Also without recirculating the air back into the intake after the MAF, you will run rich when it vents and likely also cause the car to stall..

I do run an HKS SSQV, but it ran VERY poorly with the maf sensor, with an aftermarket speed density conversion, or aftermarket blowthrough MAF, it no longer is sensitive to the venting.. you can also use an HKS EIDS..

With that said, I don't really recommend this BOV unless you need it (high boost) Its prone to compressor surge, a little difficult to adjust if you have trouble, and is very "Ugly" sounding.

 

Hey Jack, how much boost you think this BOV will hold? 25psi is ok with it? That's what i plan on boosting on race gas...

Get the MR or the 1gen bov man. If you like the sound and the looks, go for the greddy S with single spring mods. It works great for many...

 

Yeah I think it was rated to hold over 26psi, I would guess it can go as high as 30psi but I'd run a big Tial or dual SSQV's if you have anything over 25 simply because of the volume of air that would need to be vented at those pressures..