DIY install blow off valve spacer (BOV) pshhh
#1
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Joined: Nov 2015
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bmw 3msport, 2016 c300 sport amg on order
DIY install blow off valve spacer (BOV) pshhh
Got the black anodized blow off valve spacer from turbokits. Loving it. Real easy install 3 screws 10 min max time
Squeeze and pull. Tabs pop out.
I didn't detach here. Just the front part In first pic.
Stock one
Detached
New BOV spacer
Reinstall with new longer screws. Done
Video or before and after
Squeeze and pull. Tabs pop out.
I didn't detach here. Just the front part In first pic.
Stock one
Detached
New BOV spacer
Reinstall with new longer screws. Done
Video or before and after
Popular Reply
09-05-2016, 11:56 PM
Priority valves were first fitted to the Porsche 944 Turbo in 1988. Prior to that everyone used blow-off valves, where needed. Any company since, that made a good turbo system, used the priority valve setup. Audi, Porsche and Subaru are legendary examples. Priority valves are so important I actually welded fittings to my 1988 Celica GT-4 intercooler and intake box to adapt the clever Porsche 944/Audi part! Much improved the throttle response.
Now, racing turbo systems over about 2.5 bar do require a blow-off valve in addition to the priority valve function. Otherwise, the over-pressure in the intake risks splitting intercooler seams or blowing off hoses. The C-Class turbo systems are nowhere near requiring this mechanical pressure relief. The opposite is true. We want to keep that pressurized air working for us, not just **** it away.
Installing an aftermarket 'blow-off valve' defeats the clever function of the stock priority valve. The priority valve is there to remove turbo lag. It does this by recirculating the compressed air back into the atmospheric side. This keeps the compressor from stalling, so when you tip back into the throttle, it makes boost instantly. This is just as true at part throttle as full throttle. It works all the time.
There is also a very clever, simple delay spring built into the system, such that this factory priority valve system, once pulled open by manifold vacuum, resists closing for ~.1 to .3 seconds due to the resistance of this spring. This delay allows the turbocharger to spin up freely (no load) for an instant. As the valve comes completely closed, the turbine is now almost up to full rotational speed, so there is more boost available, much more when opening the throttle that without it.
If you want to understand this theory, put your hand over the suction of a household vacuum cleaner. The speed of the motor rises dramatically because, although still pulling a vacuum, it is doing no work (no air is moving). That is what the priority valve does for the turbocharger, specifically by adding pressure to the atmospheric side of the compressor wheel. It lets it freewheel momentarily and not loose rotational speed. Most important is the spring delay speeds up the turbine wheel further by there being no load on the compressor side.
-=m=-
#3
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Joined: Mar 2012
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From: Hammond, La
2018 E63S: Former cars 2016 C450, 2013 C350, 2009 C300
#5
It's done for sound. Technically I guess venting the compressed air out and bringing a cooler charge back in to be compressed instead of sending the hotter compressed air back to the front of the line to be re-spun up by the turbo may have some benefits, but I doubt anything that be be felt with the butt dyno.
#7
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bmw 3msport, 2016 c300 sport amg on order
They are 95 for the silver or 105 for the black anodized. Free 3 day shipping in the US. I got mine here in so cal in 3 days just to confirm that. Sold on their website.
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#8
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bmw 3msport, 2016 c300 sport amg on order
Reference
CNC Billet Alum piece that spaces out your stock bypass valve and vents it to the atmosphere to give you that expected turbo sound.
http://www.turbokits.com/Mercedes-Be...9_Spacer/2609/
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http://www.turbokits.com/Mercedes-Be...9_Spacer/2609/
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#9
Hey bro how are you!! Thanks for the info!! How do you like the sound??!! Is it fun? Just to clarify is there any decrease in the performace.. I dont mind if stay the same i just like the sound lol.. Whas the diff between the 2 black and aluminun.
#10
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bmw 3msport, 2016 c300 sport amg on order
Just color differences whatever you prefer!
#11
Good man! And no problem. There hasn't been any dynk proof of increase or decrease. It's iust for sound to hear the blow off. It's like a half in spacer. It is fun I find myself in sport + playing with the throttle to build boost and listen to the pshhhhh blow off. Haha.
Just color differences whatever you prefer!
Just color differences whatever you prefer!
#12
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Joined: Nov 2015
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bmw 3msport, 2016 c300 sport amg on order
Looks like you'll need 2! (you have biturbo right?) but it's 3 screws. Super simple. Took 10 min to do mine and that was including taking pictures and videos and revving it etc. if you just put it in its as fast you can Allen wrench 3 screws out and put them back in. It's that simple. You can see my little DIY above for reference.
#13
Looks like you'll need 2! (you have biturbo right?) but it's 3 screws. Super simple. Took 10 min to do mine and that was including taking pictures and videos and revving it etc. if you just put it in its as fast you can Allen wrench 3 screws out and put them back in. It's that simple. You can see my little DIY above for reference.
#15
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Joined: Nov 2015
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bmw 3msport, 2016 c300 sport amg on order
Yes we posted above yesterday the same thing:
"We have not installed them on the V6 BiTurbo yet. We have a customer who is going to test this over the next few weeks and get back to us. Our preliminary research is that they will fit. Our offer always stands that if you want to try to install them on your model and they don't fit, we will take them back for a full refund. Or you can wait until we have them tested and update instructions, etc..."
"We have not installed them on the V6 BiTurbo yet. We have a customer who is going to test this over the next few weeks and get back to us. Our preliminary research is that they will fit. Our offer always stands that if you want to try to install them on your model and they don't fit, we will take them back for a full refund. Or you can wait until we have them tested and update instructions, etc..."
#16
I'm new to Mercedes, and I've been wondering why I don't see more people with BOV's on their turbos. It's pretty normal on Japanese cars with Turbos.
What's everyone's opinion on this?
What's everyone's opinion on this?
#17
They normally want as little noise intrusion as possible from the outside, and subdue any sensation that there is an engine/transmission/wheels on your car...that's with the exception of AMG's/M-cars/etc...
So it's no surprise that they don't have these toots and whistles standard. That's why we got these legit companies making great products for the aftermarket
#18
German cars have a reputation for quiet, smooth transportation.
They normally want as little noise intrusion as possible from the outside, and subdue any sensation that there is an engine/transmission/wheels on your car...that's with the exception of AMG's/M-cars/etc...
So it's no surprise that they don't have these toots and whistles standard. That's why we got these legit companies making great products for the aftermarket
They normally want as little noise intrusion as possible from the outside, and subdue any sensation that there is an engine/transmission/wheels on your car...that's with the exception of AMG's/M-cars/etc...
So it's no surprise that they don't have these toots and whistles standard. That's why we got these legit companies making great products for the aftermarket
But I think it's these run flat tires, their noisy compared to other tires.
#20
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Joined: Nov 2015
Posts: 720
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From: NYC
2016 c450 / 2016 VW Jetta 1.8t / 2006 Wrangler X
Any confirmation or whether or not this model works on the C450? My car doesn't come in until May, but I want to hear the ttV6 with the blow off valves now! It seems like it is the perfect compliment to the crackles and "controlled backfires" provided by the exhaust.
I really can't wait to get this car. I live in a middle class neighborhood where the c300 has just replaced the BMW 328 as the official "so what I can't pay my mortgage" car. It's little obnoxious touches like these noisemakers that make me happy. My neighbors are going to ****ing hate me!
I really can't wait to get this car. I live in a middle class neighborhood where the c300 has just replaced the BMW 328 as the official "so what I can't pay my mortgage" car. It's little obnoxious touches like these noisemakers that make me happy. My neighbors are going to ****ing hate me!
#21
Originally Posted by cenzo86
Any confirmation or whether or not this model works on the C450? My car doesn't come in until May, but I want to hear the ttV6 with the blow off valves now! It seems like it is the perfect compliment to the crackles and "controlled backfires" provided by the exhaust.
I really can't wait to get this car. I live in a middle class neighborhood where the c300 has just replaced the BMW 328 as the official "so what I can't pay my mortgage" car. It's little obnoxious touches like these noisemakers that make me happy. My neighbors are going to ****ing hate me!
I really can't wait to get this car. I live in a middle class neighborhood where the c300 has just replaced the BMW 328 as the official "so what I can't pay my mortgage" car. It's little obnoxious touches like these noisemakers that make me happy. My neighbors are going to ****ing hate me!
#22
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Joined: Nov 2015
Posts: 720
Likes: 73
From: NYC
2016 c450 / 2016 VW Jetta 1.8t / 2006 Wrangler X
What I meant was the new c class has become the go to for the upwardly mobile. My area is flooded with white base model c300s. I ordered a nice car that would stand out. And fart can comment aside, I want my car to be loud and obnoxious when I want it to be.
#23
Maybe a C63 would have suited you better
#25
C400 turbokits BOV
Hello all!
I purchased 2 BOV spacers for the C400 and got to install one, the second one is just impossible to reach unless removing many parts of the engine.
Does leaving just one meantime could damage the engine or turbos?
Was anyone successful installing both??
Any help is appreciated.
Thanks!
I purchased 2 BOV spacers for the C400 and got to install one, the second one is just impossible to reach unless removing many parts of the engine.
Does leaving just one meantime could damage the engine or turbos?
Was anyone successful installing both??
Any help is appreciated.
Thanks!