Dump Valves...
Thread Starter
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1st Gear
Joined: Aug 2006
Posts: 22
From:
Dump Valves...
Can anyone shed any light regarding the A3 2.0 TDI S-Line and dump valves?
Is it possible to fit an aftermarket dump valve to this engine? (for the added effect)
Any information regarding this subject would be highly appreciated.
Cheers
Is it possible to fit an aftermarket dump valve to this engine? (for the added effect)
Any information regarding this subject would be highly appreciated.
Cheers
1st Gear
Joined: Aug 2006
Posts: 12
From:
RE: Dump Valves...
NO. Venting a Blow Off Valve / Dump valve to the atmosphere for the sake of Making Cool noises Is stupid.
Audi's Meter Air in a Draw Thru set up. The AIr Meter / MAF is located PRE turbo with the Dump Valves after IT. STock 'Diverter Valves or Compressor Bypass Valves as it were) release boost preassure back into the intake stream in between shifts. Thing is a proportionate amount of fuel has been delivered for that air (B/c it was measured allready my the MAF) If you 'VENT' that air to the atmosphere ( for added affect) ((RICER)) You will encounter a Very RICH condition and the car will run like ***. Not to mention Audi VW valves SUck at holding boost higher than stock. So not only will it effec WOT performance, Venting will also **** up your part throttle tune b/c the valves are slightly open under vacume. This will make you LEAN under vacume and cause rough idle and screw with part throttle response.
Go ahead. Plug the return inlet and vent your stock valves. You'll quickly return it to the way it was.
What you want to do can only be done right in a BLOW THRU set up. If the Air Meter was located POST TURBO and the CBV/Blow off Valve/ Dump Valves are BEFORE the METER you can vent and sound like a real turbo car all day. BUt You can't fit the air meter anywhere else nor can you relocate the CBV's on an Audi so
NO.
Audi's Meter Air in a Draw Thru set up. The AIr Meter / MAF is located PRE turbo with the Dump Valves after IT. STock 'Diverter Valves or Compressor Bypass Valves as it were) release boost preassure back into the intake stream in between shifts. Thing is a proportionate amount of fuel has been delivered for that air (B/c it was measured allready my the MAF) If you 'VENT' that air to the atmosphere ( for added affect) ((RICER)) You will encounter a Very RICH condition and the car will run like ***. Not to mention Audi VW valves SUck at holding boost higher than stock. So not only will it effec WOT performance, Venting will also **** up your part throttle tune b/c the valves are slightly open under vacume. This will make you LEAN under vacume and cause rough idle and screw with part throttle response.
Go ahead. Plug the return inlet and vent your stock valves. You'll quickly return it to the way it was.
What you want to do can only be done right in a BLOW THRU set up. If the Air Meter was located POST TURBO and the CBV/Blow off Valve/ Dump Valves are BEFORE the METER you can vent and sound like a real turbo car all day. BUt You can't fit the air meter anywhere else nor can you relocate the CBV's on an Audi so
NO.
3rd Gear
Joined: Apr 2006
Posts: 2,948
From: Tacoma, WA
RE: Dump Valves...
I thought he was taking about exhaust dumps, you can do them....
Anyway, you want the BOV sound, you CAN have it on a A3!!!
BOV sound for your A3
Anyway, you want the BOV sound, you CAN have it on a A3!!!
BOV sound for your A3
1st Gear
Joined: Jul 2006
Posts: 153
From: Poughkeepsie
RE: Dump Valves...
ORIGINAL: S4Jen
NO. Venting a Blow Off Valve / Dump valve to the atmosphere for the sake of Making Cool noises Is stupid.
Audi's Meter Air in a Draw Thru set up. The AIr Meter / MAF is located PRE turbo with the Dump Valves after IT. STock 'Diverter Valves or Compressor Bypass Valves as it were) release boost preassure back into the intake stream in between shifts. Thing is a proportionate amount of fuel has been delivered for that air (B/c it was measured allready my the MAF) If you 'VENT' that air to the atmosphere ( for added affect) ((RICER)) You will encounter a Very RICH condition and the car will run like ***. Not to mention Audi VW valves SUck at holding boost higher than stock. So not only will it effec WOT performance, Venting will also **** up your part throttle tune b/c the valves are slightly open under vacume. This will make you LEAN under vacume and cause rough idle and screw with part throttle response.
Go ahead. Plug the return inlet and vent your stock valves. You'll quickly return it to the way it was.
What you want to do can only be done right in a BLOW THRU set up. If the Air Meter was located POST TURBO and the CBV/Blow off Valve/ Dump Valves are BEFORE the METER you can vent and sound like a real turbo car all day. BUt You can't fit the air meter anywhere else nor can you relocate the CBV's on an Audi so
NO.
NO. Venting a Blow Off Valve / Dump valve to the atmosphere for the sake of Making Cool noises Is stupid.
Audi's Meter Air in a Draw Thru set up. The AIr Meter / MAF is located PRE turbo with the Dump Valves after IT. STock 'Diverter Valves or Compressor Bypass Valves as it were) release boost preassure back into the intake stream in between shifts. Thing is a proportionate amount of fuel has been delivered for that air (B/c it was measured allready my the MAF) If you 'VENT' that air to the atmosphere ( for added affect) ((RICER)) You will encounter a Very RICH condition and the car will run like ***. Not to mention Audi VW valves SUck at holding boost higher than stock. So not only will it effec WOT performance, Venting will also **** up your part throttle tune b/c the valves are slightly open under vacume. This will make you LEAN under vacume and cause rough idle and screw with part throttle response.
Go ahead. Plug the return inlet and vent your stock valves. You'll quickly return it to the way it was.
What you want to do can only be done right in a BLOW THRU set up. If the Air Meter was located POST TURBO and the CBV/Blow off Valve/ Dump Valves are BEFORE the METER you can vent and sound like a real turbo car all day. BUt You can't fit the air meter anywhere else nor can you relocate the CBV's on an Audi so
NO.
Wow.....impressive knowledge.
1st Gear
Joined: Aug 2006
Posts: 12
From:
RE: Dump Valves...
ORIGINAL: sooks
wow.. i cant say ive met a girl with more intricate knowledge of the engines before..nice work.
wow.. i cant say ive met a girl with more intricate knowledge of the engines before..nice work.
Thank you, thank you...I'm a fast learner, had to be, especially when 26 days after purchasing my S4, the turbos blew at 68,000 miles. The previous owner "raped" the car. The Audi dealership wanted $5000.00 to replace ...no way "DIY" as I always say!
See the attached pics of the turbo swap in the basement...brutal! But perfect!
Site Moderator
Joined: Feb 2006
Posts: 2,349
From: minnetonka
RE: Dump Valves...
wow.. you did a turbo replace diy... thats awesome. sorry to hear you had the issues on the car right after you got it, yeah the dealer was ripping you off.. and i assume they wanted to just put k03 in too. How do you like the hybrid upgrade and how does the tip tranny hold up to that.
Thread Starter
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1st Gear
Joined: Aug 2006
Posts: 22
From:
RE: Dump Valves...
Please can you explain an exhaust dump?
What I was looking at is, on the 2.0 TDI, when coming off the gas you hear the release of air? from... ... ...
I watched a video regarding the speaker kit... I would never install those lol