3" 2.0mm intercooler pipe work for air intake?

[jonathancullen]

hey im wondering whether or not i could piece together an air intake using 3" intercooler piping? the piping is 2mm thick. a turbo setup doesnt need the BOV return right? from my understanding it just helps keep the turbo spooled between shifts, is this correct? running 14lbs boost. i had problems trying to find a thread similar so i added tags to help others future questions hopefully. thanks

 

[PieEyedPiper]

In this case, the turbo application does require that you recirculate the bov. You will need to go speed density or run a gm MAF in order to vent to atmosphere.

 

[jonathancullen]

could you explain why? i dont understand why it has to, im thinking of different reasons why it might need it but dont wanna sound like a dumb*** because it doesnt really make sense why it would need to

im going to use the stock air filter housing and maf sensor and keep it in roughly the same place it is stock.just going to use adaptors to make it fit if i can.

 

[007jimmy]

Because venting the BOV will be releasing air that was already counted by the MAS. The ECU still accounts for the lost air and you will run rich.

 

[lilsam]

You need to be reticulated because your fuel map accounts for the air that is coming out of the bov to be fed into your engine. If these cars had the recirc tube before the maf then we could plug it and vent to atmosphere all day but we don't its after the maf so we have to run recirc unless you tune it out like he sated above..

 

[jonathancullen]

ahhh ok i understand. going to have to spend alot more then i wanted to i guess. thanks everyone. if you have links to cheaper/ish air intakes for a 91 tsi let me know. im going to start searching. there has to be a cheaper one then the bullseye power for $125 =/

 

[LiquidX]

As PiedEyedPiper said, go with a GM MAF in blow through mode or run speed density if you want to vent your bypass valve to the atmosphere. Otherwise you need to recirculate it.

Know the problems a boost leak does? Well, this is a major one when it vents.

 

[jonathancullen]

yeah i am dealing with boost leak atm and it is very annoying. a vented BOV is what makes the swoosh sound when you shift right? im saving to replace all the old rubber piping. getting a FMIC and air intake.

 

[LiquidX]

Both vented and recirculated will make a noise, it's just the vented is louder.