So uhhh, what are you gettin at here?

 

That the setup on the mini is very simular to the two srt4's. A bov placed on the cold side of the pipe will yield quicker turbo spoolups after the shift.

 

Forge = vent for the stock BOV/diverter

Alta = stand alone BOV

 

Can anyone answer this? Some additional references would be nice...

 

great post, this is my big question. I have a 3 month old 2008 Clubman S and I'm worried about warranty issues. Will the forge BOV void the drivetrain warranty?

 

Certainly shouldn't although the ECU may get irritated during shifts. Vs the ALTA that is after both MAF sensors. But either way, you should be just fine.

My point is this, if you want noise, buy any of the intakes out there. They all allow the BOV noise to be released. IF you want REALLY loud, and or NEED more venting then the ALTA is the better choice in that situation.

Thanks for the post!

 

[SIZE=2]This is a question about blow off valves more in general. I know what their basic functionality is: they release compressed air produced by the turbo when the engine no longer needs it. I know that they usually vent the air into the atmosphere. I have read that that can screw up the engine performance because it causes it to run rich. I am under the understanding that if you route the blow off valve output back to the intake before the turbo but after the mass airflow sensor, that fixes the problem, but the blow off valve doesn't make the sound that it is known for. If that is the case, does that mean that everyone who is running a loud blow off valve has poorer engine performance, or are there ways to achieve both?

The other question is: can someone explain how directing the blow off valve output back into the intake before the turbo and after the sensor fixes the engine running rich problem? My understanding is that the mass airflow sensor takes a measurement of the air coming in so that the computer can calculate the proper fuel air mixture for the given throttle position. If the throttle is in the closed position, that should mean that a minimal amount of air would be needed for the engine combustion, so the computer should only allow that minimal amount of air in for combustion. In the case of a system with a blow off valve, this scenario would cause the blow off valve to activate and release the extra air, thus creating a situation where there isn't a proper amount of air left for the computer calculate fuel amount. I can see how this makes the engine run rich for a moment. What I don't understand is how putting that air back into the system before the turbo helps the running rich problem. Reason being.... The mass airflow sensor is still calculating air coming in from the outside and is unaware of the extra air being put back into the system via the blow off valve. I would think this would create the situation where there is more air in the system than the mass airflow sensor calculated. Maybe that doesn't matter because the computer only takes what it needs for combustion, so that long as there is not a shortage, things run smoothly. This still leaves me with the question of: as long as the blow off valve is open, how does it matter to engine combustion whether or not the extra compressed air is vented into the atmosphere or back into the system since the blow off valve is redirecting all the air away from the engine. I would think that by the time that the recirculated air from the blow off valve got back to the point to be used by the engine at least one of the pistons would have fired rich, or that any needed air for a no throttle combustion could be sufficiently supplied from the standard air intake.

Thanks for your answers.
[/SIZE]

 

The bov releases air from the boost tubes in between shifts. When you have increased boost pressure, there is more air in the system, and it helps to have a larger bov to get rid of that air.

The stock system recirculates the air back into the system and the ECU expects it, so it wouldn't run rich for a split second. The recirculated air pushes the air that's already in the system, that's why it wouldn't run rich at all.

If that doesn't make any sense let me know, thanks!

 

I agree with the fact that the someone trying to get a BOV setup because of the noise is a bit, well...silly.

I am 20 years old and constantly hear people around me that I know that love the sound. Every so often I will hear contests and what not at the beach. Then I have friends, in their late twenties, early thirties with MINI's/BMWs and they have a slight bov sound and find that more pleasing than a loud barreling PSSHH. Nothing wrong with either option, but I think a lot is based on the age range as well, and there are exceptions, but everyone is entitled to what they want.

I have an ALTA CAI currently on mine. It is very audible! Just remove the stock intake system for the sound people, you will save more money and headaches in the long run. Plus, having a ALTA fiter or any other will most likely not void any warranty's, period. Its just a filter.

I just bought the AGS-R, however, and beside the many other reasons for purchasing one, it has ports for volume. So you can increase/decrease the sound anytime you want, from stock to full PSSHH. I realized that showing up for a job interview with a loud pshhhh would not be very professional! My .02.

Motor On!

Just my adivce since I been running the ALTA for almost a year now. Motor On!

 

I just recently installed a Forge Blow-Off adaptor on my mini. I'm just trying to figure out if it will void my service or warranty? Will I have to remove it every time I take my car to the dealer?

P.S. its sounding to sweet for me to want to take it off.

 

They will not be able to know its there unless they put a load on the engine. Its not something that causes ANY engine issues. Know your rights, they have to prove that it caused damage to your car, however if you dont know better they can get away wtih voiding yoru warranty with just a simple Type-r sticker!

 

LOL at the type r sticker. in case you guys didnt know, type r stickers give yo mad tork!

 

 

has anyone heard the hks bov on a mini ?

 

yup.

Do a search, lxjose9xl . I installed one on his car and he posted vides somewhere.

 

http://www.exhaustdepot.net/inbotuhakit.html

my next purchse you can even order the hks bov through them

 

YOu can order it via me. I think its in teh descriptions. Ill even mount it on for you if you want. YOu need good snap ring pliars to install it.

 

how much will you do for the whole thing for? and does the car run fine with it ?

 

$375 for the pipe kit, $275 for the bov and the flange welded on the pipe.

Ive installed a few localy but i wanted feedback from some one who was not me.

MITEMINI was a great guine pig of mine (thanks lyle). He was the first person to do a full install on his own and was kind enough to offer me some feedback etc. He will have some really good pix up soon and with his impressions.

 

what pipe kit?

 

does the car run right with it installed?

 

"This is the way the mini should have ran from the factory."

Those are his words.

 

exhaust depot

what do you think about the forge bov and your hard pipe kit with the hks bov even better respool time maybe? having a bov on both hot and cold side...

 

I always tell peeps to leave the factory one in place because teh extra valve yields even better performance. HOwever if you put a forge and it vents it will sound funny with the HKS.

SOme peeps block off their surge valve fully justs o they get a louder BOV sound. booo!

 

This is mainly srt4 stuff but its a good edumicational article i put together. Read bov 101 and the other 101 articles so you can learn how your car works.

http://www.exhaustdepot.net/srtese.html