Blow Off Valves 101: What they do, and why you need them! Tech Tip Tuesday

แชร์
ฝัง
  • เผยแพร่เมื่อ 15 พ.ย. 2024

ความคิดเห็น • 47

  • @Trialnerror
    @Trialnerror 4 ปีที่แล้ว +77

    I developed shaft play at an early age.

    • @darrentylor5473
      @darrentylor5473 4 ปีที่แล้ว +3

      Eww tmi

    • @Parkway808
      @Parkway808 3 ปีที่แล้ว +9

      Definitely suffering from premature shaft wear

    • @LoneStarStinger
      @LoneStarStinger 3 ปีที่แล้ว +1

      😶

    • @jamisonderek1607
      @jamisonderek1607 3 ปีที่แล้ว

      You probably dont care but if you guys are bored like me atm you can watch all the new movies and series on InstaFlixxer. I've been binge watching with my brother during the lockdown :)

    • @tuckerlangston8528
      @tuckerlangston8528 3 ปีที่แล้ว

      @Jamison Derek Definitely, been using instaflixxer for since november myself =)

  • @tim6913
    @tim6913 10 หลายเดือนก่อน

    Thank you, after watching mini different videos, you’re the only one that has mentioned anything about superchargers and how to regulate boost

  • @jonathan7744
    @jonathan7744 4 ปีที่แล้ว +9

    I agree that you need a BOV. But I feel like you only need the BOV near your throttle bodies. If you think about it closing the throttle creates a pressure wave starting there, if you have the BOV right there it kills the wave there. That means there should be no pressure build up in the intercooler or elsewhere. I may be wrong on this but it's what makes sense to me.

  • @mattsiev1
    @mattsiev1 3 ปีที่แล้ว +1

    Turbo Buicks never had them and plenty of stock turbos and even upgraded ones last 100k plus like that. It's an old argument but I agree they help in the right application. Larger ones need them more. I run a 6465 at 30+psi without one but that's still tiny compared to what y'all are doin'. You loose that signature turbo Buick sneeze when you go to a bov too. ;) Keep up the great videos! I love 'em.

  • @JWP1990
    @JWP1990 4 ปีที่แล้ว +10

    Can you explain the spring pressures on bov’s?

  • @shawng7902
    @shawng7902 4 ปีที่แล้ว +2

    still undecided on a blow-off valve for mine. Heard so many arguments both ways. This does sound reasonable though. What I don't like is it being open at idle. I watched a kid install one on his turbo mustang and they were all so pumped. Then I watched it as they drove. They put theirs right down at the intercooler. Driving around at normal speed with vacuum they had a 2" open valve right down at street level in the dirt. Then I heard that they spring them to engine vacuum. I thought that would keep it closed until boost overcomes the spring pressure. No here you say that they are open and floating back and forth at idle. So once again I'm lost and don't know what to do. I think I will still go ahead and run one at the TB just to save the intake and intercooler just in case.

  • @freddyrosenberg9288
    @freddyrosenberg9288 ปีที่แล้ว

    5:15 And that's how you know the blow off valve is not adjusted to suit the engine. A properly adjusted working blow off valve is shut at idle and it should take very little force to open it.

  • @adrianberryhill
    @adrianberryhill 4 ปีที่แล้ว +3

    @3:01 My new Freedom Motion Raceworks hat has been a major contributor to this issue 🇺🇸

  • @jasperpipes4222
    @jasperpipes4222 4 ปีที่แล้ว +8

    2:00 Pulling boost into cylinders ?
    You should change from Tech Tuesday to Fabricated info Friday !

  • @UnknownDevice.
    @UnknownDevice. 3 ปีที่แล้ว +2

    Can you explain the purpose of soft & hard on a blow off valve.

  • @jonathanmoore5112
    @jonathanmoore5112 2 ปีที่แล้ว +1

    I’d like to see more information on how to select the correct blow off valve for your vehicle (-6,-8,-10)

  • @Nstyle46
    @Nstyle46 4 หลายเดือนก่อน

    We need a new one with the icon!

  • @adamkelleyrealestate6976
    @adamkelleyrealestate6976 6 หลายเดือนก่อน

    Looking for advice on tuning a single cylinder motor cycle with a blow in carburetor setup

  • @JeLifeCoach
    @JeLifeCoach 3 ปีที่แล้ว +2

    This was awesome. Thank you so much. Could you do a video over BOV w/ cars that are MAP Sensored and not MAF sensored? I dont think there is any problem in a MAP sensored car w venting full to amtmosphere, but some people stay recirculating/atmosphere BOV on a MAP car will help will throttle response. I feel like it is being argued both way and Im not so sure. Thanks

  • @markgrayson8101
    @markgrayson8101 4 หลายเดือนก่อน

    @motionraceworksofficial Quick question, my car plays up if a atmospheric bov is used so have had to fit an uprated recirc valve, but I'm after some flutter, is there a way around this? I've heard a Turbosmart recirc do it on a video, but cant work out how? Any ideas?

  • @jonathanmoore5112
    @jonathanmoore5112 ปีที่แล้ว +1

    Should the bov be closed at idle?

  • @snuggleseal
    @snuggleseal 4 ปีที่แล้ว +2

    Might sound like a dumb question, but I want a BOV that is loud, is there one that is the loudest? I am looking at the PRECISION TURBO PB64MM but the price is almost double others like the TurboSmart or HKS BOVs and I dont know why it costs so much more... :-\ thx!

    • @LoneStarStinger
      @LoneStarStinger 3 ปีที่แล้ว

      Don’t get a trumpet 🎺 with your BOV... imo those are trying to hard.

  • @pigspleen
    @pigspleen 3 ปีที่แล้ว +1

    I have my bov vacuum line t'd into my turbo to waste gate vacuum line. Should I tie the bov vacuum line into the intake manifold instead?

  • @davepalmer4125
    @davepalmer4125 3 ปีที่แล้ว

    Have you done a video on plumbing the oiling system for a turbo?

  • @attzelonvenus
    @attzelonvenus 2 ปีที่แล้ว

    if the car has 900-1000 hp is it okay to put on a low budget blow off valve ?

  • @BOSS-jf7on
    @BOSS-jf7on 4 ปีที่แล้ว

    Would you explain how and why of springs , CO2. Also the strategies of their use. Thanks for sharing!

    • @BOSS-jf7on
      @BOSS-jf7on 4 ปีที่แล้ว

      Ok, I got it. I watched it again.

  • @ImTheBOSSRoundHere
    @ImTheBOSSRoundHere 4 ปีที่แล้ว

    Well my boost gauge goes down when I slam the throttle shut as you also unload the turbine wheel. Ill take my chances for that sound thoooo. 1700 miles currently with no bov but granted I'm not running a 1000+ dollar turbo

  • @roscoadventures2194
    @roscoadventures2194 3 ปีที่แล้ว

    Hi Doug got question I hooked up Yamaha blow up valve V2 works I'm confident I did it right hooked vacuum line to map senser do U no why my blow up valve will not open and close at all brand new in box can I ajust aleen key and screw nut on top maybe?

  • @1moderntalking1
    @1moderntalking1 4 ปีที่แล้ว +1

    Can u please do a video on superchargers and blow off valves? On say 9 to 12psi boost , would I still need that?

    • @NoferTrunions
      @NoferTrunions 4 ปีที่แล้ว +1

      Yes, maybe be completely different strategy since supercharger is always 100% connected to crankshaft, not like turbo with turbine waste gate.

  • @halozeus3844
    @halozeus3844 3 ปีที่แล้ว +2

    Do not watch at family event uncles wanted to know about shaft play

  • @tammypapa1
    @tammypapa1 4 ปีที่แล้ว

    What size would you need for a 80mm turbo on a sbc . New build

  • @tomscobra2003
    @tomscobra2003 4 ปีที่แล้ว +2

    Would two pt65 mm bov be overkill on a 1300hp turbo car

    • @MotionRaceworksOfficial
      @MotionRaceworksOfficial  3 ปีที่แล้ว +1

      Never hurts to have to much BOV but you could definitely get away with 2 50s.

  • @bobby_hills_outdoors5227
    @bobby_hills_outdoors5227 4 ปีที่แล้ว

    Great Informative video ! 👍

  • @freshweezyboy1733
    @freshweezyboy1733 3 ปีที่แล้ว

    Lemme do this to my truck lol. Probably void the warranty tho

  • @mcssmostwanted
    @mcssmostwanted 4 ปีที่แล้ว

    Some GTO love ❤❤❤❤

  • @dennisbanks706
    @dennisbanks706 3 ปีที่แล้ว +1

    The 11 people that disliked the video have no idea what you're talking about lol.

  • @chriscastillo3851
    @chriscastillo3851 2 ปีที่แล้ว

    What's the deal with the side ports on the pte 64mm bov any one know?!

  • @FryGuy65
    @FryGuy65 3 ปีที่แล้ว +1

    But, but, that flutter noise...

  • @terrywilson581
    @terrywilson581 2 ปีที่แล้ว

    👍👍👍👍👍🎄🎄🎄🎄😎

  • @MarcTavX
    @MarcTavX 3 ปีที่แล้ว +1

    WASTEGATES OR BLOW OFF VALVES U SAY THE WRONG THINGS AND FIX YOUR BRACES OR DONT DO SPEAKING ROLES