Jump to content
SAU Community

Stock Bov With Flutter

Shadex

By Shadex,
in Engines & Forced Induction

 Share

Recommended Posts

Shadex Collaborator

Shadex

Posted
Posted

Hey all, i was just wondering what people opinions are blocking off the vacum hose on the stock bov to get flutter..

I did it cause the i like the sound of the flutter =] and i dont wanna get defected for a bov, but i still wanna keep it half safe with the bov opening up after high revs...

But i dont know to much about it ive spoken to some people about it on NS and they said its fine to do. Id just like to go over it with some people that own skylines not silvias haha.

Link to comment
https://www.sau.com.au/forums/topic/220311-stock-bov-with-flutter/
Share on other sites
R34NRG Grand Master

R34NRG

Posted
Posted (edited)

before anyone starts dissing this flamin mongrel i rkn his asking a legit question....so i hope mods give out warns accordingly.

to answer your question, unfortunately you cant adjust what level the bov will open with the factory setup. if you want that lesure u need to get a aftermarket BOV. but then it wont flutter as loudly, and like u said can get defects. if you get a legal aftermarket BOV, you wont get flutter because it redirecting the air back into your intake.

if your cars mostly factory then its fine to just block off your current bov with some aluminum casing from coke cans or something. just got out wat you need and put it inbetween your bov and your throttle body.

heres also a old pic of my engine when i put my 1st bov on. i know its not factory but its the same shit. hope it makes some sense.

bovej6.jpg

personaly on my car ive notice it to be a bit more responsive when blocking my bov off because i always suspected the factory bov to leak under high boost. so this is a great way to fix it

on the other hand.......

alot of people on here will tell you its bad for your turbo, its bad for ur engine this and that. unfortuantely there isnt any proof that its real. theres 8second cars out there running no BOV at all, and are yet to even have the smallest engine problem. but some ppl do and they blame it on blocking there bov.....

my advice is.......its a good way not to get dicked by the cops, and have at least some sort of decent noise when backing off. i dont care wat anyone says its 10x better then the lame "woosh" that factory BOVs have.

alot of ppl here really have a anti-flutter attitude and i guess u gotta expect it if ur gonna follow this path.

if u need more in detail let me know.

Edited by R34NRG
turbo_brian Community Regular

turbo_brian

Posted
Posted

a VERY decent adjustable replacement BOV/Bypass valve is the product offered by Turbo XS, they do a direct bolt-on replacement with adjustable spring tension, etc and it's also rated up to 32PSI before it's "suspected" to leak.

I will be swapping to this product shortly from the stock GTR bypass valve, have seen this product used on the Mazda MPS vehicles, and it makes a massive difference over their plastic valve setups, not sure how it will go on the R32 Skyline, but they offer a direct true bolt-on replacement.

B.

paulr33 Grand Master

paulr33

Posted
Posted

This is a highly recommended modification to the standard turbocharger recirculation system. It will not void any warranty or factory backed warranty agreements. This modification is likely to increase the life of the turbocharger and coincidently circumvents the many many hours of research and development that was undertaken to increase turbocharger life expectancy. After the mid 80s turbocharger life expectancy was around 50,000 kms, after research and development, the factory recirculation system was developed, but its recommend that you circumvent this system to provide 1980 style life expectancy of the factory turbocharger system. All of the high performance work shops recommend this modification to increase street cred, horsepower, torque on the dyno and your custom user rating in points.

Guest
This topic is now closed to further replies.
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • brillo
      Leak from Tokico BM50 Brake Master Cylinder

      By brillo · Posted

      Hi, SteveL Thank you very much for your reply, you seem to be the only person on the net who has come up with a definitive answer for which I am grateful. The "Leak" was more by way of wet bubbles when the pedal was depressed hard by a buddy while trying to gey a decent pedal when bleeding the system having fitted the rebuilt BM50 back in the car, which now makes perfect sense. A bit of a shame having just rebuilt my BM50, I did not touch the proportioning valve side of things, the BM50 was leaking from the primary piston seal and fluid was running down the the Brake booster hence the need to rebuild, I had never noticed any fluid leaking from that hole previously it only started when I refitted it to the car. The brake lines in the photo are "Kunifer" which is a Copper/Nickel alloy brake pipe, but are only the ones I use to bench bleed Master cylinders, they are perfectly legal to use on vehicles here in the UK, however the lines on the car are PVF coated steel. Thanks again for clearing this up for me, a purchase of a new BMC appears to be on the cards, I have been looking at various options in case my BM50 was not repairable and have looked at the HFM BM57 which I understand is manufactured in Australia.  
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      PXL_20250828_063541093.TS.mp4
    • Gantai
      R33 GTST Steering Rack (49001-19U05) Rebuild?

      By Gantai · Posted

      Well the install is officially done. Filled with fluid and bled it today, but didn't get a chance to take it on a test drive. I'll throw some final pics of the lines and whatnot but you can definitely install a DMAX rack in an R33 with pretty minor mods. I think the only other thing I had to do that isn't documented here is grind a bit of the larger banjo fitting to get it to clear since the banjos are grouped much tighter on the DMAX rack. Also the dust boots from a R33 do not fit either fyi, so if you end up doing this install for whatever reason you'll need to grab those too. One caveat with buying the S15 dust boots however is that the clamps are too small to fit on the R33 inner tie rod since they're much thicker so keep the old clamps around. The boots also twist a bit when adjusting toe but it's not a big deal. No issues or leaks so far, steering feels good and it looks like there's a bit more lock now than I had before. Getting an alignment on Saturday so I'll see how it feels then but seems like it'll be good to go       
    • PranK
      R35 GT-R production ends after 18 years

      By PranK · Posted

    • SteveL
      Leak from Tokico BM50 Brake Master Cylinder

      By SteveL · Posted

      I don't get in here much anymore but I can help you with this.   The hole is a vent (air relief) for the brake proportioning valve, which is built into the master cylinder.    The bad news is that if brake fluid is leaking from that hole then it's getting past the proportioning valve seals.   The really bad news is that no spare parts are available for the proportioning valve either from Nissan or after market.     It's a bit of a PITA getting the proportioning valve out of the master cylinder body anyway but, fortunately, leaks from that area are rare in my experience. BTW, if those are copper (as such) brake lines you should get rid of them.    Bundy (steel) tube is a far better choice (and legal  in Australia - if that's where you are).
×
×
  • Create New...