HKS BOV Not Blowing Off! comp surge! ARGH! <<<------------------------

[DROOPY209]

sorry to highjack the thread.....

the vacuum line nipple on my HKS SSQV BOV is very tiny.

how should i go about this, so i can still fit the hose into the intake manifold and onto the HKS bov?

also, im gunna disconnect my pcv hose from the intake manifold and hook up my manual boost controller to that fitting in the IM......is this a good idea or bad idea?

 

[Mackzero]

sorry to highjack the thread.....

the vacuum line nipple on my HKS SSQV BOV is very tiny.

how should i go about this, so i can still fit the hose into the intake manifold and onto the HKS bov?

also, im gunna disconnect my pcv hose from the intake manifold and hook up my manual boost controller to that fitting in the IM......is this a good idea or bad idea?

Just get a vac line reducer. That is how I ran my BOV. And... DON'T DO THAT, unless you want oil in your boost controller...

 

[DROOPY209]

Just get a vac line reducer. That is how I ran my BOV. And... DON'T DO THAT, unless you want oil in your boost controller...

how could i get oil in my boost controller if im gunna eliminate the pvc valve all together?

I'm gunna get the pressure source from the manifold, instead on tee-ing off the bov line.

my pvc valve is gunna get hollowed out and ran to a small filter/catchcan.

 

[oldman]

I'm gunna get the pressure source from the manifold, instead on tee-ing off the bov line.

Why are you so hung up on taking the pressure source from the manifold? What I posted earlier about the pros and cons of tapping from compressor vs manifold still applies except for #2 sice you kept it away from the BOV line.

1. The main argument for using the intake/BOV source is that it's controlling the manifold poressure (what goes into the engine) so it's more accurate when in reality it doesn't matter because the boost level you see on the boost gauge is always tapped into the manifold anyway, the only difference is a slight adjustment with the mbc due to pressure drop after IC.

2. The accuracy of vacuum and boost signal to the BOV is very crucial to the proper functioning of the BOV. Most mbc will vent to the atmosphere one way or another either through a bleeder type mbc like the TurboXS Standard mbc or through the wastegate relief hole on a ball and spring type when you go WOT. This will change the pressure level on the BOV line and cause the BOV to either open too late when letting off or open too early during boosting.

3. Tapping off the compressor/licp will greatly reduce the chances of boost spike due to short route pipping.

4. In the case of serious boost leaks, it will help preventing over spinning the turbo.

5. If you own a bleeder type mbc (TurboXS) or a poorly designed ball and spring type mbc where the ball does not fit tightly with the housing allowing air to flow around the ball, tapping off the BOV/intake lines will create a vacuum leak.

 

[DROOPY209]

Why are you so hung up on taking the pressure source from the manifold? What I posted earlier about the pros and cons of tapping from compressor vs manifold still applies except for #2 sice you kept it away from the BOV line.

Well, since I'm gunna get rid of my pcv valve and will have a open fitting on the intake manifold, I thought that maybe I could hook up my mbc to that fitting as my pressure source, as the HKS bov will now have its own vacuum line by itself.

I didn't know people would have a cow about me asking if I can do this safely.

Do you understand what I am asking? Or is my English insufficient?

i just want to give the mbc its own pressure source at the intake manifold, since I will now have that fitting open.

 

[oldman]

Well, since I'm gunna get rid of my pcv valve and will have a open fitting on the intake manifold, I thought that maybe I could hook up my mbc to that fitting as my pressure source, as the HKS bov will now have its own vacuum line by itself.

I didn't know people would have a cow about me asking if I can do this safely.

Do you understand what I am asking? Or is my English insufficient?

i just want to give the mbc its own pressure source at the intake manifold, since I will now have that fitting open.

My question is that why are you insisting on taking the pressure source from the manifold instead of the compressor housing? The list of concerns I posted is not only for taking pressure source from the BOV line, besides #2, everything else still applies to any intake manifold pressure source. Do you understand what I'm trying to say or is my English insufficient.

 

[DROOPY209]

My question is that why are you insisting on taking the pressure source instead of the compressor housing? The list of concerns I posted is not only for taking pressure source from the BOV line, besides #2, everything else still applies to any intake manifold pressure source. Do you understand what I'm trying to say or is my English insufficient.

I will have an open fitting on the intake manifold when I remove the pcv valve.

Instead of just capping off the fitting, wouldn't it be better if I got my pressure source for my MBC from that fitting and gave my bov its own line?

That way, I won't be tee-ing off the bov line and I wont have to get a plastic fitting to reduce the line from the size in the mbc to the size on the compressor, compromising the performance, materials and reliability.

Besides, I've read that it's better to get your pressure source for the MBC from the intake manifold anyways. That is where my boost gauge measures the boost as well.

 

[larsrya8]

Besides, I've read that it's better to get your pressure source for the MBC from the intake manifold anyways. That is where my boost gauge measures the boost as well.

The thing is... a MBC doesn't need to know how much boost you are running. A MBC just makes the amount of boost go up or down. There is no specific "16 psi" setting. If the boost at your manifold isn't what you want, just turn the MBC up. It's going to have the same effect no matter where it's tapped.

I can't think of any other way to explain it.

 

[SpoOLxExO]

I'm just gunna have to chime in here, since I run one of these BOV's.

This is a no-compromise BOV for a well modded Vehicle running a decent amount of boost.

I can probably bet your not running 18+psi of boost right now then?

This is the type of boost that the universal unit was intended to relieve.

I am pretty sure these springs can be retro-fitted into the ssqv unit.

http://www.hksusa.com/products/?id=760.

I don't get compressor surge, because I am running 20psi or more on this valve.


To alleviate your problem:

-Replace with a lighter spring

-Turn the boost up (Along with all the other vacuum line suggestions as well )

 

[wearurpjs]

if it wasnt working at all, then my turbo would be dead, true...
the reason I was trying to figure out if it was even working was the BOV sounds nothing like an HKS at all. it sounds just like the sound that used to come out of my STOCK bov, which is what was causing all this concern. could I in fact just have a broken BOV?

 

[danielbui]

if it wasnt working at all, then my turbo would be dead, true...
the reason I was trying to figure out if it was even working was the BOV sounds nothing like an HKS at all. it sounds just like the sound that used to come out of my STOCK bov, which is what was causing all this concern. could I in fact just have a broken BOV?

False. a BOV is security in ad to keep pressure from stopping your turbo from spinning and to keep it moving. you can run your car without a BOV and many Grand National guys don't use them. i agree their performance would be better with one but the guys that are going 9.50's tend to disagree with me. (just from local experience. take with a grain of salt.) ALOT! man talking to those guys is like talking to a brick wall. hope that helps, good luck.

 

[wearurpjs]

I saw a writeup on another forum...something about tigthening up the springs...Ill mess with that, see what happens...maybe somethings loose in there...

 

[Turbocharged]

I saw a writeup on another forum...something about tigthening up the springs...Ill mess with that, see what happens...maybe somethings loose in there...

There is only one spring inside the HKS bov. You want to LOOSEN it if you are experiencing compressor surge. To do this, adjust the bolt on the back of the bov. Back it out as far as it will go.

 

[wearurpjs]

well, I finally found the reason. dude sold me a broken bov. dont know if he knew that or not, still trying to figure that out. never returned my calls, or messages. I got hosed. so I just sucked up the loss and bought a new one. everything works just fine now. thanks for all the suggestions and ideas, you guys were a great help. oh if youre on MWIR by any chance...stay away from this guy.

http://www.irnn.net/forum/index.php?showuser=6859
eclipseenthusiast. his name is garrett.