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Blow off Valve
Posted: Thu Jan 04, 2007 1:50 pm
by Libra Monkee
I need a lesson. The guy who I'm getting the UTEC from is also offering a TurboXS RFL blow off valve for an additional 175 bucks. Now I don't much about blow off valves beyond that they're supposed to help the turbo (in some way), in the wrong setup they can compromise driveability or cause turbo lag, and the noise they make can attract cops.
Can anyone help shed a little light on what these things actually do and what gains and/ or losses I can expect iffing I should get the BOV also?
Posted: Thu Jan 04, 2007 2:24 pm
by complacent
NO. DON'T GET ONE. RUN AWAY FROM THE BLOW OFF VALVE. IT'S TOTAL CRAP. LEAN CONDITION AFTER SHIFT FTMFL.
Yea, they suck.
Posted: Thu Jan 04, 2007 2:25 pm
by sirwilliam
complacent wrote:NO. DON'T GET ONE. RUN AWAY FROM THE BLOW OFF VALVE. IT'S TOTAL CRAP. LEAN CONDITION AFTER SHIFT FTMFL.
Yea, they suck.
^^Wise words, Chuck! 
...well unless you are going to be running a 2.8L motor w/ a GT42R turbo pushing 500WHP+, then I would recommend an atmospheric BOV.
Posted: Thu Jan 04, 2007 2:36 pm
by Libra Monkee
Wow!
Red,
bold,
huge, and ALLCAPS!!!! If only it were
italicized I might be able to take you seriously.
Posted: Thu Jan 04, 2007 3:05 pm
by Sabre
to what C man said! They are only good for noise and attracting po-po's!
On a more technical note:
The stock BOV is good to around 21PSI, after that it starts to leak. The stock turbo (VF39 in your case) is WAY out of it's efficiency range at those boost levels, so I doubt you'll ever see them unless it's by mistake or with water injection. When you upgrade your turbo, if you plan on running more than 21PSI, then you might consider upgrading the BOV. By that time, you'll probably have switched over to a FMIC anyway
Posted: Thu Jan 04, 2007 3:24 pm
by Mr Kleen
BOVs are bad for us Scoobys. while I do like the sound of an BOV I'm not sure I could live with it on a daily basis. and there is a reason BOVs are referred to as a "pig whistle" on nabisco...
Posted: Thu Jan 04, 2007 4:06 pm
by chicken n waffles
your stock bov >>>>>>>>>>>>>>>>>>>>>>>>>> aftermarket bov
plus they sound rice.