HKS Super SQV IV Blow Off Valve

[jtsang25]

Here’s another fly by that’s similar but I think my son who’s recording captures it a bit better. Lol.

Any performance benefits. I know these engines don't need a BOV. All for sound?

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[JRedMKV]

Any performance benefits. I know these engines don't need a BOV. All for sound?

No performance benefits at all as far as I can tell. It’s just for the cool factor of HKS and the sound in my opinion. Lol.

 

[JRedMKV]

Also, for anybody wondering, the install isn’t that bad. I made it even simpler on myself by not taking apart my entire center console and instead I used a fuse tap at the passenger footwell fuse box to get power and ground.

 

[Lemmy]

Also, for anybody wondering, the install isn’t that bad. I made it even simpler on myself by not taking apart my entire center console and instead I used a fuse tap at the passenger footwell fuse box to get power and ground.

do you mind going into a bit more detail ? I wanna add this BOV so bad but the install seems insane

 

[JRedMKV]

do you mind going into a bit more detail ? I wanna add this BOV so bad but the install seems insane

Sure no problem but my disclaimer is do this at your own risk. I am not responsible for whatever you do to your car.

That being said, if you use a fuse tap on F47 of this fuse diagram to get your power, then just ground the black wire to a nearby bolt, you’ll be able to power the HKS controller. Based on other threads here on the forum, F47 is one of the locations that turns off completely after 6 minutes so there is no worry of draining your battery. Then just follow the instructions with the orange and blue wire.

 

[NJA90]

Hey bud,
I m gonna be doing the install. What type of fuse did you use? Size and Amps.

 

[JRedMKV]

Hey bud,
I m gonna be doing the install. What type of fuse did you use? Size and Amps.

I used two 10amp fuses. They are the larger size, not the minis

 

[suicidaleggroll]

That is the first time I’ve seen the whole kit… why are there so many electronic parts and so much wiring for a mechanical bov? That’s a bit daunting. Haha

Because a typical BOV is operated by the pressure differential between the air before and after the throttle plate. Release the throttle, throttle plate closes, manifold goes into vacuum and “pulls” the BOV open. The B58 doesn’t use a throttle plate though, when you let off the throttle nothing closes and the manifold doesn’t go into vacuum. Without manifold vacuum a traditional BOV would never open, so this one has to be operated electronically.

 

[Tsuki]

Because a typical BOV is operated by the pressure differential between the air before and after the throttle plate. Release the throttle, throttle plate closes, manifold goes into vacuum and “pulls” the BOV open. The B58 doesn’t use a throttle plate though, when you let off the throttle nothing closes and the manifold doesn’t go into vacuum. Without manifold vacuum a traditional BOV would never open, so this one has to be operated electronically.

I understand how a BOV works, but I’ve seen quite a few installed on Supras that work fine without all of the extra electronics… hence my confusion.

 

[NJA90]

I used two 10amp fuses. They are the larger size, not the minis

Thanks bro. Any issues or recommendations? Did you still have to take apart thing the center console at all or no? Also cold air intake had to come out?

 

[JRedMKV]

Thanks bro. Any issues or recommendations? Did you still have to take apart thing the center console at all or no? Also cold air intake had to come out?

Yes the cold air intake has to come out so you can remove either the factory charge pipe or if you already had an aftermarket one.

By using the fuse tap method I did not have to take apart the center console at all. Have some extra wire because you might need to extend the positive wire from the HKS controller to reach the fuse box.

 

[Eman]

Sure no problem but my disclaimer is do this at your own risk. I am not responsible for whatever you do to your car.

That being said, if you use a fuse tap on F47 of this fuse diagram to get your power, then just ground the black wire to a nearby bolt, you’ll be able to power the HKS controller. Based on other threads here on the forum, F47 is one of the locations that turns off completely after 6 minutes so there is no worry of draining your battery. Then just follow the instructions with the orange and blue wire.

Was about to ask you all this on instagram! I just got mine in. Probably install next weekend. Thanks for the info!!

 

[Eman]

I went with the manual when installing and it was actually super easy. Watching the video from a90 shop helped a lot too.

 

[NJA90]

Does anyone know if that 3rd cap on the solenoid is suppose to go back or that hole just stays open to vent? I put the vacuum lines on the COM AND NO ports only but removed 3 caps as per instruction manual.

 

[NJA90]

Also, can anyone share ideas or pictures on how they hid the wires? From the controlled and the accelerator pedal?

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