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07-25-2007, 05:30 PM | #23 | |
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You are right, completely. Its not my car. I just prefer to not blow up a 10k+ motor, eventually in a normal injection motor it would. |
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07-25-2007, 05:37 PM | #25 | |
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That is how a Audi Tech explained it to me. So if Im wrong, we can thank the pros.:w00t: |
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07-25-2007, 05:40 PM | #26 | |
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Id rather run a little rich, especially on turbo motors, than lean. Like I said though, either can cause problems. We just have to find the happy medium, especially when boost levels are high. |
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07-25-2007, 05:50 PM | #27 |
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An Audi tech? The DV on an Audi recirculates air (from the charge pipe pre-intercooler) into the intake after the MAF (between the MAF and turbo inlet). I can take a picture of the piping on my A4 if you want
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07-25-2007, 05:54 PM | #28 | |
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There is always so much hype over BOVs but I have not heard of one car where a blown engine was due to a BOV. The worst I have heard is a choppy idle. Everyone said the same thing about Evos and folks installed with no problems and have high mileage cars now with no problems. For my edification.. and I am being serious... Can you point me to a post somewhere that shows that a BOV blew the engine? I mean where that was the end all and be all result was the BOV blew the engine.. I may just need to see it to believe it. This will be my 3rd Turbo car and 3rd forum I have been on where they say the same thing yet no posts of BOV blew my engine up.. I really would like to know before I make a mistake. Either way.. I still think that HKS sounds AWESOME.. I had it on my SRT-4. |
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07-25-2007, 06:44 PM | #29 |
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People are aware that most BOV units come with recirculation fittings, making it a diverter valve, yet they will still be louder??
As the owner of a turbocharged direct injection car with a stock and HKS SSQV, I won't be changing the next one... |
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07-25-2007, 08:57 PM | #31 |
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No the blowoff isnt as loud.
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07-25-2007, 09:00 PM | #32 | |
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BTW, I love the SSQV. If and if I learn enough about BMWs DV and direct injection as long as I dont see an issue with fuel mixture I may end up doing something like that, but at stock form it would be futile besides for the noise. Function over fashion for me! |
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07-26-2007, 03:59 PM | #33 |
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I have done some reading on the E90 post and it looks like the N54 uses MAP sensors, not a MAF.
I will consider a BOV. There is nothing wrong with a little "whoosh" after throttle lift. No screeching banshee trumpet siren, prob look at one of the hybrid valves, reroutes back into the intake, but also has a VTA. The one I used on my miata was great - the VTA port sat higher than the recirc port. And average dump would just recirculate, but if you were running high boost and got off it fast it would VTA. Sad to see people having to poop all over the fun. If you don't want one on your car, well, don't get one. Does it need it? Hell no. But what do you care? |
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07-26-2007, 04:08 PM | #34 |
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I have personally seen 5 335i's running blow off valves with no problems. I will be getting the HKS Super Sequential myself. Reputable vendors are selling blow off valve kits for the 335i. I doubt they would be selling a product they know would damage the car.
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07-26-2007, 04:12 PM | #35 | |
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HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHHAAHAHAHAHAHAHA HAHAHAHHAHAHAHAHAHA :bs: Im sorry.... With that comment, you must not have been around the game very long. They do whatever they need to do to make money. |
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07-26-2007, 04:34 PM | #36 |
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I disagree. Companies who have been around for a long time such as AA would not be selling and installing these kits like crazy if they knew there was a potential to damage customer vehicles and their reputation. The profits generated from one of these 700 kits is not enough to cover them having to replace blown up motors left and right. Furthermore as I stated in my original post there are plenty of 335i's running hard with blow off valves.
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07-26-2007, 04:38 PM | #37 |
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07-26-2007, 04:40 PM | #38 |
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It won't blow up your motor. It will just run like crap and damage it over time. Go ahead and rice out your German machine. It will not help performance, just attract attention and laughs. I personally would point and laugh.
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07-26-2007, 04:50 PM | #39 |
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Can someone on here verify they know of a 335i with a blow off valve that ran like crap? I have seen a handfull that run great with them. Yet you guys have no evidence of the car running like crap and are simply assuming the car will not run correctly when there are plenty of cars on the street running blow off valves which would prove otherwise. Feel free to prove me wrong. The evidence will speak for itself.
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07-26-2007, 08:34 PM | #40 | |
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07-26-2007, 09:48 PM | #41 | |
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If its true that the N54 uses a MAP (not MAF) system, then BOVs are 100% OK. In that case, its all personal preference. My personal preference would be NOT to install a BOV even if it were OK. |
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07-27-2007, 12:15 AM | #42 | |
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Seems like we need some turbo education in this forum. A wastegate and blow -off valve are totally different and worth totally different. Externally gated turbos are much much better for tuning and also instrumental for large turbos. Wastegates prevent overboosting. BOVs relieve charged air that is useless due to heat soak. |
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07-27-2007, 12:16 AM | #43 | |
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They are essentially the same product, but we do need confirmation of that. They both read air. |
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07-27-2007, 10:48 AM | #44 | |
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the end result to the ECU is similar - how they each do their job is quite different. http://en.wikipedia.org/wiki/Mass_flow_sensor http://en.wikipedia.org/wiki/Manifold_absolute_pressure |
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