Just installed a Blow Off Valve
#1
11-01-2007, 03:06 AM
Just installed a Blow Off Valve
so, i have been contemplating for the longest time...should i get a forge dv, or a regular old bov... for my B6 1.8t quattro w/APR +1
after about 2-3 weeks of debating i just realized i had a brand new Blitz Dual Drive blow off valve somewhere in my room. It is part of a turbo kit i was piecing together for my swapped 1986 corolla that's all decked out.
installing this BOV was a PITA! the blitz piston is huge in comparison to the OEM DV. and the hose that goes to the stock dv is about half the size required of the blitz bov. anyway, with the luck of orchard supply hardware and some brass fittings i got this all mocked up.
the original reason i decided to try installing the bov was the fact that i wanted to see if the factory DV was not holding all the boost pressure that my APR +1 is pushing through it. so far, it seems as though the stock dv was definately holding me back. my car now climbs to redline faster than it did with the factory dv. still fairly slow, but it does it a tad easier now.
definate negatives like you all have stated in previous posts. car dies out when you put the shifter into neutral after boosting. that is true...my solution, tomarrow i will try stiffening the bov spring a tad, and then using lemmiwinks to subtract 5% or 10% fuel on throttle decrease. i'm going to play around with it to see which works best. other than that fact, the car seems great. another tidbit is almost the majority of factory turboed vehicles have a preturbo metering system like our Audi does. Since those cars don't seem to have too much of an issue with installing a bov i figured why not! i'd give it a shot! and it turned out just fine.
pictures and video's to come.
after about 2-3 weeks of debating i just realized i had a brand new Blitz Dual Drive blow off valve somewhere in my room. It is part of a turbo kit i was piecing together for my swapped 1986 corolla that's all decked out.
installing this BOV was a PITA! the blitz piston is huge in comparison to the OEM DV. and the hose that goes to the stock dv is about half the size required of the blitz bov. anyway, with the luck of orchard supply hardware and some brass fittings i got this all mocked up.
the original reason i decided to try installing the bov was the fact that i wanted to see if the factory DV was not holding all the boost pressure that my APR +1 is pushing through it. so far, it seems as though the stock dv was definately holding me back. my car now climbs to redline faster than it did with the factory dv. still fairly slow, but it does it a tad easier now.
definate negatives like you all have stated in previous posts. car dies out when you put the shifter into neutral after boosting. that is true...my solution, tomarrow i will try stiffening the bov spring a tad, and then using lemmiwinks to subtract 5% or 10% fuel on throttle decrease. i'm going to play around with it to see which works best. other than that fact, the car seems great. another tidbit is almost the majority of factory turboed vehicles have a preturbo metering system like our Audi does. Since those cars don't seem to have too much of an issue with installing a bov i figured why not! i'd give it a shot! and it turned out just fine.
pictures and video's to come.
#3
11-01-2007, 01:38 PM
Senior Member
Join Date: Dec 2006
Location: Redding, California 1998.5 A4 1.8TQM
Posts: 1,953
RE: Just installed a Blow Off Valve
Ummm?...did I miss somethin?
I didn't know lemmiwinks could eliminate the need to keep our systems closed?
Im guessing you are running super rich....ummm....are you releasing pressure to da atmosphere?
I do not believe that playing with your fuel ratio will help at all in da long run...most people are fine running a BOV to da atmosphere for about 6 mos. then their cat is done for.....
well, If I was you I would recirculate as much if not all released pressure...
you will hear a similar effect from running the same piston DV in a closed loop system with a cone filter onda end of ur maf....
gl!
I didn't know lemmiwinks could eliminate the need to keep our systems closed?
Im guessing you are running super rich....ummm....are you releasing pressure to da atmosphere?
I do not believe that playing with your fuel ratio will help at all in da long run...most people are fine running a BOV to da atmosphere for about 6 mos. then their cat is done for.....
well, If I was you I would recirculate as much if not all released pressure...
you will hear a similar effect from running the same piston DV in a closed loop system with a cone filter onda end of ur maf....
gl!
#5
11-01-2007, 02:40 PM
RE: Just installed a Blow Off Valve
Its the same idea as the forge as far as i know. prt goes to atmosphere for noise and part gts recirculated.
and how would changing the A/F ratio on deceleration not help? thats the only time that it runs ritch.
and how would changing the A/F ratio on deceleration not help? thats the only time that it runs ritch.
#6
11-01-2007, 03:26 PM
RE: Just installed a Blow Off Valve
ORIGINAL: qUaTtRoA4
Ummm?...did I miss somethin?
I didn't know lemmiwinks could eliminate the need to keep our systems closed?
Im guessing you are running super rich....ummm....are you releasing pressure to da atmosphere?
I do not believe that playing with your fuel ratio will help at all in da long run...most people are fine running a BOV to da atmosphere for about 6 mos. then their cat is done for.....
well, If I was you I would recirculate as much if not all released pressure...
you will hear a similar effect from running the same piston DV in a closed loop system with a cone filter onda end of ur maf....
gl!
Ummm?...did I miss somethin?
I didn't know lemmiwinks could eliminate the need to keep our systems closed?
Im guessing you are running super rich....ummm....are you releasing pressure to da atmosphere?
I do not believe that playing with your fuel ratio will help at all in da long run...most people are fine running a BOV to da atmosphere for about 6 mos. then their cat is done for.....
well, If I was you I would recirculate as much if not all released pressure...
you will hear a similar effect from running the same piston DV in a closed loop system with a cone filter onda end of ur maf....
gl!
i thought by reading some of the other threads and the newbie guide that running a bov will do more harm in the long run than just killing a cat..... but i dunno
#7
11-01-2007, 03:59 PM
RE: Just installed a Blow Off Valve
ORIGINAL: BARRY
so, i have been contemplating for the longest time...should i get a forge dv, or a regular old bov... for my B6 1.8t quattro w/APR +1
after about 2-3 weeks of debating i just realized i had a brand new Blitz Dual Drive blow off valve somewhere in my room. It is part of a turbo kit i was piecing together for my swapped 1986 corolla that's all decked out.
installing this BOV was a PITA! the blitz piston is huge in comparison to the OEM DV. and the hose that goes to the stock dv is about half the size required of the blitz bov. anyway, with the luck of orchard supply hardware and some brass fittings i got this all mocked up.
the original reason i decided to try installing the bov was the fact that i wanted to see if the factory DV was not holding all the boost pressure that my APR +1 is pushing through it. so far, it seems as though the stock dv was definately holding me back. my car now climbs to redline faster than it did with the factory dv. still fairly slow, but it does it a tad easier now.
definate negatives like you all have stated in previous posts. car dies out when you put the shifter into neutral after boosting. that is true...my solution, tomarrow i will try stiffening the bov spring a tad, and then using lemmiwinks to subtract 5% or 10% fuel on throttle decrease. i'm going to play around with it to see which works best. other than that fact, the car seems great. another tidbit is almost the majority of factory turboed vehicles have a preturbo metering system like our Audi does. Since those cars don't seem to have too much of an issue with installing a bov i figured why not! i'd give it a shot! and it turned out just fine.
pictures and video's to come.
so, i have been contemplating for the longest time...should i get a forge dv, or a regular old bov... for my B6 1.8t quattro w/APR +1
after about 2-3 weeks of debating i just realized i had a brand new Blitz Dual Drive blow off valve somewhere in my room. It is part of a turbo kit i was piecing together for my swapped 1986 corolla that's all decked out.
installing this BOV was a PITA! the blitz piston is huge in comparison to the OEM DV. and the hose that goes to the stock dv is about half the size required of the blitz bov. anyway, with the luck of orchard supply hardware and some brass fittings i got this all mocked up.
the original reason i decided to try installing the bov was the fact that i wanted to see if the factory DV was not holding all the boost pressure that my APR +1 is pushing through it. so far, it seems as though the stock dv was definately holding me back. my car now climbs to redline faster than it did with the factory dv. still fairly slow, but it does it a tad easier now.
definate negatives like you all have stated in previous posts. car dies out when you put the shifter into neutral after boosting. that is true...my solution, tomarrow i will try stiffening the bov spring a tad, and then using lemmiwinks to subtract 5% or 10% fuel on throttle decrease. i'm going to play around with it to see which works best. other than that fact, the car seems great. another tidbit is almost the majority of factory turboed vehicles have a preturbo metering system like our Audi does. Since those cars don't seem to have too much of an issue with installing a bov i figured why not! i'd give it a shot! and it turned out just fine.
pictures and video's to come.
2- stiffening the spring isn't gona completely solve your problems. if you do it too tight you won't release enough air when it "blows off" and if its notstiff enough its gona be open at idle, which is bad
3- these cars do have issues when running a BOV thats open at idle
ORIGINAL: turbo kraut
i am no mr. smarty pants, but if the only ill effect is just killing your cat, wouldn't a tp fix that?
i thought by reading some of the other threads and the newbie guide that running a bov will do more harm in the long run than just killing a cat..... but i dunno
i am no mr. smarty pants, but if the only ill effect is just killing your cat, wouldn't a tp fix that?
i thought by reading some of the other threads and the newbie guide that running a bov will do more harm in the long run than just killing a cat..... but i dunno
#8
11-01-2007, 04:01 PM
RE: Just installed a Blow Off Valve
i didn't think so, that is why i said what i said with some sarcasim, and why i was searching and found that month old thread i posted in....... lol
#9
11-01-2007, 04:02 PM
RE: Just installed a Blow Off Valve
here just look through some of this stuff
https://www.audiforums.com/searchpro...bmitbutton=+OK+
https://www.audiforums.com/searchpro...bmitbutton=+OK+
#10
11-01-2007, 05:03 PM
RE: Just installed a Blow Off Valve
your maf calculates air before the dv, so if you let it all out you will run rich for a small amount of time. how damaging this is, is disputable, and i think on 2000+ models the car adapts to running a bov in a few days anyways cause of the map sensor so you will only run rich for a day or 2. guess we will find out if/when kemp's engine blows. but a bov that remains open at idle is not good for a car with a MAF. forge 004 and ssqv are both closed at idle. if your running stand alone than you can put whatever you feel like on it.