BOV for a 99 A4 1.8T Quattro
 

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.

RE: BOV for a 99 A4 1.8T Quattro
 

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 $.

RE: BOV for a 99 A4 1.8T Quattro
 

BOV's are for ricers ... you need turbo By-pass valve

RE: BOV for a 99 A4 1.8T Quattro
 

Amen to that.

RE: BOV for a 99 A4 1.8T Quattro
 

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.

RE: BOV for a 99 A4 1.8T Quattro
 

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 :D

RE: BOV for a 99 A4 1.8T Quattro
 

if you want a BOV go get a honda!!

RE: BOV for a 99 A4 1.8T Quattro
 

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....[sm=drooldude.gif]

RE: BOV for a 99 A4 1.8T Quattro
 

the intake air is before the MAF, it gets measured.

RE: BOV for a 99 A4 1.8T Quattro
 

Try these guys...

http://www.ecstuning.com/stage/edpd/...ategory=Intake

Polished aluminum or black annodized $69.00
or OEM rev C $52.00