HKS Blow Off Valve got bov? email blowoffvalves@935motorsports.com
As you know, HKS is the #1 choice overall for performance between shifts. The reason is the reverse design of the BOV that allows the boost to push the valve closed, eliminating any chance of leakage. This is called a pull type BOV. Boost is pressing on the back of the valve, holding it closed, until the BOV sees vacuum (when you let off the throttle) which pulls the small valve up letting the air out. The larger valve opens as well, depending on the spring tension. Also, with twin valves, you can be sure that you are releasing pressure under low boost and high boost.
Don't you hate it when you see long lists of items with no pics and information? Here we will provide pictures of what the kit will contain, as well as sound clips, installed pics and links to installation articles for full support! If you don't see a kit for your car, just let us know and we will help you make it!
Articles:
VW 1.8T installation by overboost.com (we can provide the parts)
VW 1.8T installation pics by snowboy70 (we sell this installation kit)
Installation on WRX by WRXtuners.com
Installed Pictures:
HKS Racing II w/ purple insert on a Single Turbo Supra
Ready to purchase? Visit our new shopping cart system with search options, tracking and more!
|
Part # |
Description | Retail Price | Your Cost | |
| 1421-SF006 | 2002 WRX Turbo | $310 | $243 | |
| 1421-SM003 | 90 - 96 Dodge / Eagle - Stealth R/T | $495 | $396 | |
| 1421-SM4US | 95 - 98 Dodge / Eagle - Talon Turbo | $270 | $216 | |
| 1421-SM418 | 2002 VW GTI Turbo (route in) | $300 | $250 | |
| 1421-SZ007 | 93 - 96 Mazda RX7 Twin Turbo | $395 | $316 | |
| 1421-SZ006 | 86 - 91 Mazda RX7 Turbo | $390 | $312 | |
| 1421-SM41G | 91 - 94 Complete 1g Eclipse kit** | -- | $265 | |
| 1421-SM4US | 95 - 99 Mitsubishi Eclipse Turbo | $270 | $216 | |
| 1421-SM4EVO | 2003 Custom Lancer Evolution kit Vent To Air | $275 | $220 | |
| 1421-SM4EVI | 2003 Custom Lancer Evolution kit Recirculated | $287 | $230 | |
| 1421-SM009 | 2001+ JDM Lancer Evolution VII kit** | $320 |
$285 |
|
| 1421-SM003 | 90 - 99 Mitsubishi 3000GT VR4 | $495 | $396 | |
| 1421-SN023 | S15 SR20DET | -- | $260 | |
| 1421-SN005 | 90 - 96 Nissan 300ZX Twin Turbo (2) | $795 | $636 | |
| 1421-ST009 | 90 - 95 Toyota MR2 Turbo | $390 | $312 | |
| 1421-ST012 | 93 - 98 Toyota Supra Twin Turbo | $300 | $240 | |
| 1421-ST001 | 86 1/2 - 92 Toyota Supra Turbo w/ Hardpipe | $415 | $332 | |
| 1421-ST012 | 86 1/2 - 92 Supra For stock port | $300 | $240 | |
| Coming Soon | 88-89 Celica All Trac | |||
| 1421-SA00185 | 90-93 Celica All Trac*** | $285 | $230 | |
| 1421-SA001 | Super Sequential Universal Kit | $250 | $190 | |
| 1421-SA001ST50 | SSQV Universal Kit w/ Steel Flange | $295 | $236 | |
| 1421-SA001ST60 | SSQV Universal Kit w/ Steel Flange | $305 | $245 | |
| 1421-SA001AL | SSQV Universal Kit w/ Alum Flange | $285 | $230 | |
| 1421-RA001 | Racing Blow Off Valve Type II | $510 | $408 | |
Ready to purchase? Visit our new shopping cart system with search options, tracking and more!
| Part # | Description | Retail Price | Your Cost | |
| 1422-SM01US | Eclipse / Talon 95 - 99 Re-circulate Kit | $45 |
$40.50 |
|
| 1422-SM4FLANGE | 2003 Lancer Evolution, 2G Eclipse 1" ID tube styles adapter flange. | $60 |
$55 |
|
| 1422-SAFIT18 | 1" OD Flange for AUDI/VW and other BOSCH types | $75 | $50 | |
| 1422-SM4EVKIT | 2003 Lancer Evolution Fitting kit for SSQV | $80 | $55 | |
| 1404-SA004 | Universal Pipe 50mm (O.D.) x 150mm (L) | $110 | $99 | |
| 1410-SA001 | Weld-On 50mm Steel Flange | $45 | $40.50 | |
| 1410-SA002 | Weld-On 65mm Steel Flange | $60 | $54 | |
| 1410-SA003 | Weld-On 60mm Aluminum Flange | $35 | $33.25 | |
| 1422-SA001 | SSQV Round Insert -- Purple | $15 | $13.50 | |
|
1422-SA002 |
SSQV Fin Insert -- Gold | $15 | $13.50 | |
| 1421-FIT001 | SSQV Recirculation Fitting Only (No Hose) | $13 | $12 | |
| HKSSSHOSE | 1.25" Hose Elbow/ 2 Clamps (non hks parts) | $12* | ||
| 1g to 2g flange | Allows you to use 95-99 Eclipse kit | $25* | ||
| 1G HKS adapter | Allows HKS SSQV to bolt to 1G | $65** | ||
| 17669-015187 | SKYLINE/1G Eclipse Flange | $100 | $80** | |
| 91731-065100 | O-Ring | $5 | $5 | |
| 91711-009100 | C-Clip | $5 | $5 |
*=Pricing estimate
**=Special Order
***=Special Welding Required
What do the optional inserts sound like?
The gold insert sounds the same as stock and is a dress up only item.
The purple insert will remove the high pitched squeal of the SSQV and make it more of a woosh sound, similar to the Blitz DD. A video clip is in the multimedia section.
Removing the insert or running with a re-circulation fitting open to air will quiet the BOV even further and is the best bet if you do not like to draw attention.
How do I get a kit for my 1G eclipse?
You can buy the universal kit and a universal flange to weld onto a custom upper IC pipe.
You can buy a 1g to tube adapter and the 2g HKS BOV kit.
You can order the Skyline Flange and the universal SSQV kit (long wait) for a perfect fit.
For all of the above, you might want the recirc fitting and a hose to go back into intake.
How do I adjust my SSQV?
First you should know that the usual tight/loose rules do not apply here.
The adjustment only affects the outside black valve, not the inside purple valve.
No matter how loose you adjust the bov, it will not leak. However, if you adjust it too loose, the parts inside will come apart and possibly jam the bov.
For most applications you want the loosest setting, which allows the bigger valve to open faster loosing all of the compressed air
If you adjust the bov more tight, the air will only come out of the small valve first, then the larger valve, depending on the tension. This will create a louder high pitched sound for the small valve, and a smaller deep pitched sound for the large valve. Some people like the bov tightened all the way for maximum "shreek" upon release.
You need a 10mm wrench to adjust. Loosen the nut closest to the bov slightly. Now you can adjust the top bolt to your liking. Go for a drive. Once the bolt is where you like it, turn the nut to the right to "lock" that position. Do not over tighten the bottom nut. Again, be careful not to over-loosen the top bolt. If you loosen it too much, it will come right out.
Why do I have surge (a woo woo woo woo sound) on my SSQV?
This is a result of the valve not pulling the valve open, while the turbo compressor is spinning. The air gets "stuck" in the system and slowly returns causing a repeating woo woo woo sound.
The HKS SSQV needs high air flow on the back of the valve and a strong vacuum source to pull the valve open. On some cars where the bov is positioned in an odd location, this may not be possible at part throttle. The turbo is creating lots of air, but little to no boost has reached the manifold due to a pressure loss across the IC.
You can re-locate the valve and/or get a stronger vacuum source to help combat this effect. You want a thick single line straight the manifold for a vacuum source, as short as possible.
Mild surge at little to no boost levels will not damage your turbo.
If you are worried about this noise, you may want to consider re-installing your original bypass valve in addition to the SSQV so that the air flow at part throttle can be released as intended. Otherwise, you may want to change to a push type blow off valve that will operate on less of a vacuum source.
I have a BOSCH OEM Valve, can I fit an SSQV ?
You can fit an SSQV using the AUDI 1.8 type flange.
The flange allows you to place the BOV into the tube that had the stock bov.
There is also a plug available that lets you seal the return side if you do not wish to recirculate
