Jump to content
SAU Community

Blow Off Valves

Mavric

By Mavric,
in Victoria

 Share

Recommended Posts

Mavric Grand Master

Mavric

Posted
Posted

Howz it going guys,

I just brought my self an R33 and i live in Melbourne. My skyline has a BOV on it and i want to keep it on there, besides it sounding good it's also good for the turbo as we all know. Does anyone know if it's possible to keep the blow off valve on the car and keep it legal.

Thanx Matt.

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/
Share on other sites
TurboX Mentor

TurboX

Posted
Posted
Howz it going guys,

I just brought my self an R33 and i live in Melbourne. My skyline has a BOV on it and i want to keep it on there, besides it sounding good it's also good for the turbo as we all know. Does anyone know if it's possible to keep the blow off valve on the car and keep it legal.

Thanx Matt.

Only if its not venting to atmosphere and plumbed back in like the standard unit as far as I know. Then you loose the sound, so might as well have the stock unit and no problems.

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-966899
Share on other sites
Mavric Grand Master

Mavric

Posted
  • Author
Posted

Thanx guys so there is no way not even if i get an engineers certificate to say that the car requires one or that it is fitted as to his specification does anyone know if thats possible. i wanna try cover all areas to get around this one and im sure others have done this process and know the facts.

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967000
Share on other sites
RedBaron Enthusiast

RedBaron

Posted
Posted

just quickly about BOV's, i have seen some BOV welded on the intake pipe. is that still illegal?

If its on the intake pipe.. before it hits the turbo, its not really "bad" air so to speak... at that point i would have though.. so it should technically be legal..

correct me if i am wrong guys.. still a noob :cheers:

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967009
Share on other sites
SKY031 Grand Master

SKY031

Posted
Posted
so there is no way not even if i get an engineers certificate to say that the car requires one or that it is fitted as to his specification does anyone know if thats possible.

You can't get a BOV engineered (unless it's a plumb back)

You can't get a certificate to say the car "needs one"... because it doesn't.

just quickly about BOV's, i have seen some BOV welded on the intake pipe. is that still illegal?

uh.... are you sure you aren't talking about air flow meters?

I don't know why anyone would put a BOV on the intake, it wouldn't do anything.

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967033
Share on other sites
Mavric Grand Master

Mavric

Posted
  • Author
Posted

Is there any mechanical benefit on welding the BOV onto the intake as it's not getting rid of any excess air from the turbo or is it? And will it still cause a big and hard working turbo to stall on deceleration???

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967358
Share on other sites
Downforce Grand Master

Downforce

Posted
Posted

I have a HKS SSQV and the standard R34 BOV. I leave the HKS BOV off most of the time as it attracts too much attention and is just asking for a defect notice.

If the car comes factory fitted with a BOV then it is LEGAL. My car went through ADR37 compliance like every other import vehicle, and all factory fitted items are noted as compliant. The fact that the factory R34 BOV makes a wooshh sound makes no difference, it is a factory fitted item and my compliance plate says it passes as compliant so the cops or EPA cant do sh!t about it :)

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967458
Share on other sites
R34GTT Collaborator

R34GTT

Posted
Posted
Only if its not venting to atmosphere and plumbed back in like the standard unit as far as I know. Then you loose the sound, so might as well have the stock unit and no problems.

Aftermarket BOV with plumb back will still make noise, well mine does any way (GReddy). From my experiance if you run high boost like mine does (1.5 bar), then an aftermarket one is needed (my stock one starts leaking for some reason).

My 2 cents worth.

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967597
Share on other sites
paulr33 Grand Master

paulr33

Posted
Posted

the stock bov with a pod filter is pretty loud, just like a normal blow off valve, i dont see the need for an aftermarket bov unless you run a crapload of manifold pressure from heaps of boost aka 20psi ++

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-967774
Share on other sites
SS8_Gohan Grand Master

SS8_Gohan

Posted
Posted
 The fact that the factory R34 BOV makes a wooshh sound makes no difference,

does the factory BOV make a venting to atmo sound??? I wasn't aware of that. Still haven't got my R34 so i don't know :rofl: never driven one either :D

Link to comment
https://www.sau.com.au/forums/topic/47963-blow-off-valves/#findComment-968123
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      $5 Clock upgrade for R32 GTR

      By GTSBoy · Posted

      The attached document is fine. I just downloaded & opened it.
    • ToothDR32
      $5 Clock upgrade for R32 GTR

      By ToothDR32 · Posted

      Hello, sorry for being late to join the discussion, but my clock just died on me.   Ive tried to look at Michaels digital clock repair.docx and it doesnt work maybe the file has expired.   Please let me know if you can re upload it or take some youtube videos to show us how to get the clock installed? thanks
    • MissMintyR33
      R33 persistent issues. P/steering and lag/misfire

      By MissMintyR33 · Posted

      I thought that might be the case, thats what I'll start saving for. Thanks for the info 
    • jtha7
      Strange issue RB25DET wont start

      By jtha7 · Posted

      Ps i found the below forum and it seems to be the same scenario Im dealing with. Going to check my ECU coolant temp wire tomorrow    From NICOclub forum: s1 RB25det flooding at start up Thu Apr 11, 2013 7:23 am I am completely lost on this. Car ran perfectly fine when I parked it at the end of the year. I took the engine out and painted the engine bay, and put a fuel cell with an inline walbro 255 instead of the in tank unit I had last year. After reinstalling everything, the engine floods when the fuel pump primes. if i pull the fuel pump fuse it'll start, and as soon as I put the fuse back in it starts running ridiculously rich. I checked the tps voltage, and its fine. Cleaned the maf as it had some dust from sitting on a shelf all winter, fuel pressure is correct while running, but wont fire until there is less than 5psi in the lines. The fuel lines are run correctly. I have found a few threads with the same problem but no actual explanation of what fixed it, the threads just ended. Any help would be appreciated. Rb25det s1 walbro255 fuel pump nismo fpr holset hx35 turbo fmic 3" exhaust freddy intake manifold q45tb q45 maf   Re: s1 RB25det flooding at start up Fri Apr 12, 2013 5:07 am No, I didn't. I found the problem though. There was a break in one of the ecu coolant temp sensor wires. Once it was repaired it fired right up with no problems. I would have never thought a non working coolant temp sensor would have caused such an issue.
    • jtha7
      Strange issue RB25DET wont start

      By jtha7 · Posted

      Hi sorry late reply I didnt get a chance to take any pics (my mechanics on the other side of the city) but the plugs were fouled from being too rich. I noticed the MAF wasn't genuine, so I replaced it with a genuine green label unit. I also swapped in a different ignitor, but the issue remains. I've narrowed it down a bit now: - If I unplug and reconnect the fuel lines and install fresh spark plugs, the car starts right up and runs perfectly. Took it around the block with no issues - As soon as I shut it off and try to restart, it won't start again - Fuel pressure while cranking is steady around 40 psi, injectors have good spray, return line is clear, and the FPR vacuum is working. It just seems like it's getting flooded after the first start I unplugged coolant sensors to see if its related to ECU flooding but that didnt make a difference. Im thinking its related to this because this issue only started happening after fixing coolant leaks and replacing the bottom part of the stock manifolds coolant pipe. My mechanic took off the inlet to get to get to do these repairs. My mechanics actually just an old mate who's retired now so ill be taking it to a different mechanic who i know has exp with RBs to see if they find anything. If you have any ideas please send em lll give it a try. Ive tried other things like swapping the injectors, fuel rail, different fuel pressure regs, different ignitor, spark plugs, comp test and MAF but the same issue persists.
×
×
  • Create New...