Congrats! You've decided to do the ultimate in mods and install a blow-off-valve in your Audi! You'll be the envy of the neighborhood, get huge horsepower and torque gains, as well as the speed to smoke that ***** in the Viper next track day! This is a nice, simple job to do, and it should only take you about 20 minutes with basic hand tools.

First off, you have to choose the BOV you want to use. This in itself can be intimidating, but relax. You just need to shop around for a fast car with a turbo (say, a WRX) then google search a BOV that fits that. Buying from overseas is also a plus since the rest of the world owns faster cars than us you can be sure you're getting the most bang for your buck.

I chose the APS High Volume Twin Vent BOV for my project, because since it's for the WRX I should get insane gains both on the track and in the sack! It was from a site in Australia because they have long, flat, and fast roads there, so they must know what they are talking about!


Now that you've chosen your BOV, you have to pick where you're going to install it. Not only does it have to be in a spot that's easy to see when you've got the hood open, but it has to be effective for maximum performance. A big, flat spot will help the BOV cool the air it vents from the tubo, resulting in the longevity and performance desired for your high-horsepower racing machine. The obvious location is right on the turbo quad spooler manifold, right next to the throttle body:


Installing it is easy, all you need to do is take a 50mm hole saw and drill out a hole in the spooler manifold. Then, using Gasketmaker sealer, and sheet metal screws, put the BOV right on there:


Now all you need to do is fire it up, and drive off! Don't forget that since the BOV modifies your torque curve, you need to change your driving style as well. Always launch in second, becase your cars first gear can't handle all the power anymore. Make sure you stay on boost, too, so don't let your engine get below 5000 rpm. Feather the clutch in all your gears to keep your engine and turbo properly spooled up. If you like, you can also add a nitrous system to port right into the BOV!

Enjoy your new BOV, and the new found power, respect, and Big Macs it will get you!


*disclaimer: improper use of a BOV can lead to flaming, cancer, and loss of respect to 1989 Honda Civics. The writer of this tech article assumes no responsibility of *** whuppings and banning from forums, as well as keyed paint and other side affects. For more install tips and advice, please visit kaleco auto!

 

Nice write up. Should be very helpful for those interested...lol.
But I don't understand why everyone is so against a bov.Granted they are the signature of a ricer, butI am running one with no rich issuesother than a slightly rich shift,which is not bad,and it performs ten times better than the evo dv I had been using with the gtrssetup. As long as you make sure that it is closed at idle(which is where most people go wrong) it is fine.

 

[sm=happybounce.gif][sm=icon_rofl.gif]




sheit - that'll defenitly get in the way of the hood....
u should prollly drill a hole in the hood to make room right?

 

No, holes cause drag and slow it down. We did like on the Eclipse and just slammed the hood down a few times till we got a "power hump" in the hood!

 

said that about 40+ times and people still dont gather that concept. Also a "ricer" is someone that throws random crap on the car for no real purpose (gigantic wings, cut springs, cut exhaust/fart cans...etc). A bov is not "rice," it is still a relief valve and actuall works great if you choose the right one. I have no richness issues and runs better than the 710n ever did.

 

Thats why I got rid of my old signature, while hillarious, still didnt convey a message that it is possible to use a BOV the right way on an Audi. Yes, I said it.... It is a fact thoughthata lot of people who want a BOV will not research it much and all they care about it the noise (which is where the ricer label comes from), and many DO have CEL's fromrunning rich.How do you get a BOV to recirculate at idle, but not inbetween shifting gears at speed or whenever your off the throtle when driving?

 

Yeah, but most people that are looking for BOV info are the kind that "want that cool sound ololo"

 

BOV's do not recirculate period, thus bov. What you need is for it to stay close at idle. The two best and problem free are the HKS SSQV and a Forge 004 twin piston bov (available from ecstuning). Now that you know that you need to know this, once you install a bov on your car MAYRUN RICH FOR A FEW DAYS. This will go away after adaptaion has taken over and you will run like stock again. You may not have this problem, but you should still expected it. Also if you use a single piston you run the risk of stalling out your car leaving you with limited brakes and no steering, in otherwords a 3000+lb rolling object. So please do not try to run something i didnt list above.

 

whats the differnce between a bov for a certain sound and certain exhaust for a certain sound?? Some may like a borla, some may only want a remus, same concept, its just sound!

 

Yah, ya know Im sort of getting over it. If people just want the sound good for them. Let them get their BOV and see what happens I guess.