http://www.serioussolutions.com/evo/hks_ssqv.htm
Please post comments, corrections, and recommendations here. I welcome your input.

Edit: register.com can kiss my a$$ ... switched domain name.

 

I just ordered an hks ssqv bov form ulitimate racing and recently purchased the recirculating fit. According to your notes, the car still appears to be bogging when the bov vents despite recirculating the vent air back into the intake. Is the bog terribly noticable? and do you notice any loss in performance? Finally whe the bov vents, is the wooooosh sound audible? like those bov's that vent directly to air?

thanks
-ran

 

Very nicely done. Thank you for your time. Well written and photographed.

Thanks again....

 

nice you should try and record how it sounds

 

The bogging only happens when cruising when maintaining speed requires letting off a bit. IMO it's not terrible at all but it is noticable.

Seat dyno noticed not only an improvement of maintaining acceleration through gear shifts under power (main reason why we get BOV, right?) but from about 2100RPM as well... probably due to better sealing. Still same crappy acceleration from anything under 1700 RPM, but that's to be expected.

When recircing, you hear almost no noise when venting. Maybe if you listen really hard and get the sound to reflect off a jersey barrier or building or something. I should probably have a friend stand on the sidewalk and vent as I go by him. While stopped I did rev it with the airbox cover off and the air filter out and noticed venting (PSSSH-SHT-SHT-SHt-SHt-Sht-Sht-sht-sht) haha. Cool sound if you're into hearing BOV venting. On a side note my guess is that if you put on an intake like the one Buschur offers you're gonna hear the venting and hear it well.

I should mention that if I wanted to VTA I'm not sure how I'd secure the BOV since the intake (in to BOV) hose lets it move around a lot (the BOV out fitment/tube is solid on the turbo intake). VTA applications may require a flange on the engine intake pipe.

Thanks for the questions. You gave me the idea to maybe record some sound clips... will try to do that this weekend.

 

nice ...

what kind of flange did you use to fit it?

 

Hey thanks for the 411!

-ran

 

Didn't.... used the stock location of the diverter valve and replaced it with the BOV. It's all hoses, no flanges to deal with.

 

Bogging sounds like you dont have the BOV adjustment screw adjusted properly.....either too loose or too tight. Gotta find that sweet spot.

 

Boost and Vacuum meters are on the way. Thinking of rigging a light to indicate release. Thoughts? Suggestions?

The car is perfect when accelerating, slowing, and idling. Maintaining speed is where the wierdness is.

 

Thx for the write up netmand, i hope to use it when i get my SSQV.

 

I have a blitZ VTA and it is awesome...Super loud!

 

Question, I've always had my BOV vent to atmosphere. What are the gains/changes when recirculating the air?

 

that was a heavy duty write up man...

i'm kinda lost when it comes to modding and tuning a turboed car... why do you want this BOV...? what is it doing for you that the factory unit did not...?

 

Honestly I don't know. I never had it VTA. Recircing meant the install to went right in the stock location.

Thoeretically when you VTA you're releasing air that's been measured already, which would put your intake in a rich condition until the BOV sealed back up again. Since lifting the throttle means you don't want power that point is academic if you ask me. But it is wasting fuel and making your cat work a tad harder (cleaning a rich exhaust mix). Thoeretically speaking. I have no A/F numbers nor EGT numbers to back this up at all.

Think about this as well: Since compressing air creates heat it's expansion is actually a cooling process. Now this is good for the intake tract VTA'ing or recircing but if you're recircing you're cooling the intake before the turbo too... and perhaps spinning the compressor a little bit more. Again this is pure speculation.

You decide. It seems the engine works just fine either way.