BOV for a 99 A4 1.8T Quattro
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BOV for a 99 A4 1.8T Quattro - 7/18/2006 5:30:32 AM
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notKreative
Posts: 10
Joined: 7/18/2006
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i'm a noob wen it comes to german cars. this is my first euro and turbo car. i was wonderin wut is the best company for euros for bov's. also there is a wire connected to my stock bypass valve and i was wondering if there was an aftermarket bov that supports that, if not what was the alternative. thanks for ur help.
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RE: BOV for a 99 A4 1.8T Quattro - 7/27/2006 5:37:03 PM
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iowaboostin
Posts: 24
Joined: 7/19/2006
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Do a search about BOV's.
I'm a newbie to the Audi world too (don't even own one yet) but it's a closed-loop system just like Eclipses which are my 'specialty.' Blow-off valves are designed for an open-loop system whereas a bypass valve/diverter valve are for closed-loop. If you were to put a BOV on an Audi w/o modification of some sort then you would be running rich in between shifts. This would very slowly cause damage to the turbo and simply harm your engine -- rich conditions are just bad, leave it at that. The air that is being vented to the atmosphere is no longer being metered by the MAF. I'm not sure which kind of aftermarket support there is for running a true BOV on an Audi but for DSMs/Eclipses there's the Maf-Translator + 3" GM MAF sensor setup allowing you to run a BOV correctly.
Simply put, don't run a BOV. Go get a diverter valve/bypass valve. Look at the Forge 007, I've been reading reviews like crazy and they seem to be overall very nice for the $.
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RE: BOV for a 99 A4 1.8T Quattro - 7/30/2006 4:04:22 PM
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InExile
Posts: 854
Joined: 3/1/2006
From: Black Mountain, NC
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BOV's are for ricers ... you need turbo By-pass valve
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RE: BOV for a 99 A4 1.8T Quattro - 7/30/2006 4:46:02 PM
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zat0rsk1
Posts: 576
Joined: 7/23/2006
From: Long Island, New York
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Amen to that.
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RE: BOV for a 99 A4 1.8T Quattro - 8/2/2006 7:28:34 PM
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jonus079
Posts: 331
Joined: 1/26/2005
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u can put one on but it needs it has to have an extremely tight spring. we put one on my friends car (1.8t passat). it was from turbo xs and we had to add all the washers it came with to keep the car from stalling. the problem is when u make the spring in the bov stiff enough to where ur car wont stall, the vacum pressure has a hard time opening the valve so when u drive slow you can hear turbo surge because the valve is not opening. in the long run its not good for your turbo. iv hear of people using hybrid bov's but have never seen actualy seen one.
another thing is my friend noticed his car was alittle slower with it. we could never figure out why.
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RE: BOV for a 99 A4 1.8T Quattro - 8/2/2006 8:32:06 PM
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zat0rsk1
Posts: 576
Joined: 7/23/2006
From: Long Island, New York
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Just do not use a BOV on any of these cars. Simply Put. Anyone who tryes to rig it just to make it work has serious mental problems. It aint meant for it so dont use it 
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RE: BOV for a 99 A4 1.8T Quattro - 10/18/2006 6:44:52 PM
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dpunisher95
Posts: 39
Joined: 12/5/2005
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if you want a BOV go get a honda!!
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A4 1.8T Quattro!!
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RE: BOV for a 99 A4 1.8T Quattro - 10/19/2006 10:03:56 PM
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Chingy
Posts: 439
Joined: 3/28/2006
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quote:
ORIGINAL: 1234RiNgs
what if you do the B5 intake DIY mod and then put in BOV.
would the extra air coming in be moniterd by the MAF and not run rich.
i dunno just a suggestion....
the intake air is before the MAF, it gets measured.
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RE: BOV for a 99 A4 1.8T Quattro - 11/10/2006 11:10:14 AM
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CrZyAuDiKiD
Posts: 2
Joined: 11/9/2006
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HEY GUYS... I'M A NEWBIE AND I HAVE A 2002 AUDI A4 B6 1.8T
I USED THE HKS SUPER SEQUENTIAL VALVE KIT THAT IS MADE
FOR THE 1.8T ENGINE, IT CAME WITH A PLUG TO PLUG UP WHERE
THE DIVERTER USED TO DUMP THE AIR BACK INTO THE HOSE...
DO YOU GUYS THINK THIS SET UP IS SAFE, I HAVE NO CHECK
ENGINE LIGHT ON SO FAR...
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RE: BOV for a 99 A4 1.8T Quattro - 11/11/2006 2:41:12 AM
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chaos92287
Posts: 8044
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From: Ft. Lauderdale/ Tallahassee, FL
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first thing, turn off the caps. secondly wut do you mean it plugs it up? does it vent to atmosphere then? if so ya its bad. it means your running rich and will cause problems down the road. switch it for a forge 007 or 710n(<-- cheaper but not as good as a 007)
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RE: BOV for a 99 A4 1.8T Quattro - 11/11/2006 4:43:14 AM
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BadLuckAudi
Posts: 9131
Joined: 9/6/2005
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GOD WHEN WILL THESE PEOPLE LEARN BOVS ARE BAD FOR AUDI'S
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New Beast: 99.5 Ford F350 Powerstroke w/ 07 front, Dp tuned, 5'' Exhaust, Big Turbo
99.5 A4 1.8TQM GIAC, Borla Testpipe. Forge 006, S4 Front, C/O's
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