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Does this have any performance impact at all decrease/increase or is it just for the sound
This mod is total nonsense. The valve in question is not a blow-off valve. It is a priority valve (or compressor by-pass) that prevents turbo lag. Besides making more noise, letting that air escape to atmosphere increases turbo lag and deadens throttle response, because it defeats the action of the stock design.
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.
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.
its the same installation for the c400? hmm do i need 2?
Can you pm me how much for two and where to buy it? I live in San francisco ca. Do yoi have any local store here.. Thanks
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.
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.
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.
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.
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!
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!
Cool!! I want one!! My concern now is the installation.. Is it easy.
Cool!! I want one!! My concern now is the installation.. Is it easy.
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.
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.
Yes bro i saw your video.. I was laughing while reading yoyr message.. 10mins including revving and taking pictures lol!!
Turbokit.com just gave a disclaimer to not try on the V6TT yet as they cannot confirm the exact fitment. So just hold off on trying on the V6TT just yet
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..."
If I had the bi turbo I would buy them and try them to squash this already. It's easy enough to try at least! Plus two blow off's I would imagine it being an even more aggressive PSHHH sound. I'm jealous.
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?
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
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
Ah, got it. Interesting thing is, this C450 is probably the loudest car I've had in years compared to all my Infiniti's, Acura's, Lexus, etc.
But I think it's these run flat tires, their noisy compared to other tires.
Will you always hear the blow off sound? Where it will get annoying say at low speed in traffic etc? Or is it only noticeable during acceleration / spirited driving? Thanks.
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!
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!
Lol? Sounds everyone in the hood upgraded their '94 civics with fart cannons into 300s and 328s
Lol? Sounds everyone in the hood upgraded their '94 civics with fart cannons into 300s and 328s
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.
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.
02-21-2016, 12:50 PM
