Why Don't Diesels Run Blow Off Valves??
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- čas přidán 10. 07. 2024
- You know that universally recognizable "WOOOOOSH" sound that everybody loves on a turbocharged vehicle? That sound comes from a blow off valve (BOV) or recirculating valve, but why do gasoline engines need them and diesel engines do not?
Today, we are going to talk about why that is!
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I love how every sector of car enthusiast has a different term for things, even regionally.
That compressor map looks like a tropical depression.
Great video, wish everyone on youtube was as concise as you without the need of 10+ minute videos
My c15 twin turbo pushes 65psi on a daily and I definitely hear the bark coming off the throttle when I’m pushing a hill and someone cuts me off. In the past I thought about putting a BOV but not sure how it would activate without vacuum.
Hell yeah brother
Toasted two turbo's in less than 18 months. Put a third turbo on with a Turbosmart BOV and I'm now 3 years on with no issues and recently pulled the turbo for inspection and it was as good as new. My BOV setup is extremely loud and it scares the sheet out of anyone that's next to me if I let off with 40lbs of boost. I highly recommend anyone running an aftermarket turbo and significantly increased boost pressure to install a BOV for turbo longevity.
What does your setup look like?
You don't need one if you don't back off the throttle hard or you xan shift into Neutral. That's what a lot of sled pullers have had to learn to do when ending their run. Nothing wrong with BOV though if that's the route you want to take.
This is cool . My stage 3 kc300x for my 7.3 starts to light around 3500 Rpms with the 1.0 Ar housing ...and zf6 and after that she is on a mission 😂😂😂
Now I know, thanks!
my 03 cummins 6 speed manual definetly barks at the 4k rpm range i can here it loud as can be, when im coming up to speed on say a busy highway. Should i ne looking at a valve for it possibly?
can you make that sound again?
My 6.5l diesel Suburban with a spring on the waste gate....it could bark a little.
I’d like to buy a BOV for my 2500 Cummins can any one recommend any ?
I thought the wastegate was supposed to let off boost pressure from the turbo whether it’s gas or diesel engine
a wastegate controls turbo speed to limit max boost on the exhaust side where as a BOV controls excess boost pressure when you slam the throttle closed to prevent damage to the compressor wheel,it does not do anything while your foot is in the throttle
Because theres no throttle butterfly simply as that
Do a video on the 6.4 fusion set up . K thanks
Will do!
@@KCTURBOS you’re the man🫡
Would you recirculate before or after whatever you're using to measure your air?
before
Its best to re-circulate the air back into the intake, pre-turbo.
If it's a mass air flow car you want it before the turbo but after the MAF, otherwise it'll read that same air volume twice and create a rich condition. The reason being it read that air sprayed fuel for it because gas cars target specific AFR based on airflow but that air never made its way into the cylinder because it got recirculated elsewhere. You want the MAF to see where the air has gone and by sending it back pre turbo but post maf it slows the maf reading down and thus keeping the AFR accurate. This is the main reason the OE's do recirculating valves instead of atmospheric venting valves. That said if your MAF is located in a boost/charge pipe your only option is to vent it back into the turbo inlet and let the MAF read it twice.
I had a blow off valve on my last compound set up. S468 over an s488. Completely unnecessary but back then no one had done it. Lol
We love completely unnecessary! haha
@@KCTURBOS me too. I miss the good ole days when a 1000hp common rail was barely streetable. Just raw
Weird how it works, my ISF2.8TDI required a Blow off after eliminating the EGR from the engine and ECU, the excess pressure is coming thru the blow off.
Same here Isf2.8tdi, eliminated EGR completely..... f...cked up everything on Dyno.... installed Turbo Smart for diesel and retunned... perfect!!!
i run a BOV on my 6.0 powerstroke and it makes a lot of noise
LMFAO
@@rossosborne8858 they don’t have throttle bodies they’re diesel
Interested in hearing this?
@@KCTURBOS the only Diesel I know of that has something like a throttlebody is the 6.7 power stroke
@@rossosborne8858 "5 shatatas" So now you have turbo bark? Why is that a good thing? Also, how or why would you add a throttle body on a 6.0?
I’ve yet to see a turbo damaged by bark.
Can you explain the "peeeew" noises diesels make after letting of the throttle?
The rick flair wooooh?
i think its because the varialbe turbo veins open up to let the exhaust flow more freely as you dont need the turbo spooled any more, and this changes the flow of the air through the exhaust to a much faster flow and this air going through the dpf or cat makes that sound
EcoBoost? Yuck my wife's expedition has the 400hp one. What a disappointment. POS back at the dealership trying to still fix the shifting issue.Think fords gonna buy it back now. At least they got us a crew cab f150 this time with a coyote as a rental I don't wanna give it back lol
actual video is on 3:07. Thank me later 👍
my work truck barks like hell
Bad turbo
Uhhh diesels don’t use throttle bodies
No duh 🙄
He said that in the video.. 🤣
Captain obvious
Actually, 2003 was the first throttle body ish thing for the 6.0 powerstroke and has been used for EGR purposes ever since
Later 6.0s did not have throttle plates. And it is not actually used as a throttle plate. In other words it does not close when you let of the throttle… because it’s not tied to the throttle. It is only activated to help the egr. So it’s not really a throttle plate
I love the sound of turbo bark!
"Turbo Bark" WTF, is that a name you just made up?
Turbo flutter, compressor stall / surge.
"turbo bark" is somewhat of a commonly used term
I have always heard it called turbo bark
What's your problem? It's a very common term....
@@dozerboyd8784 Better late than ever buddy eh. Let me know when a turbo sounds like a dog will ya....
No throttle body 😂
Most Diesels don’t have throttle plates
Why fastest gasoline engines dont use blow off valve ? Because racing is not fast and the furious.
My diesel is not automatic. THANK GOD
Manuals are a blast to drive sometimes!
That doesn't mean it won't bark.