What is the BEST blow-off valve, I know it's been asked before Options

[lagos]

ok i found out what a blow off valve is for (to avoid being flamed ) A blow-off valve is mounted in the intake plumbing between the turbocharger compressor and the throttle plate. The blow-off valve is a second safety measure against the turbocharger over-boosting and damaging the engine Optionimports.com but what causes overboost?

its not to prevent over boosting. its to prevent compressor surge. basically when the throttle plate closes, the turbo is still spining but the compressed air has no place to go. this puts a lot of strain on the turbo blades and coul damage the turbo. with a bov, the presure is released from the piping and no surging happens

and most important of all... its a cool noise maker

[scothaniel]

Not sure how the BOV helps preventing over boosting at all. Most BOV's dont open until the pressure is beyond 45PSI or so. Are you sure you weren't reading about the wastegate?

The BOV's main purpose is to help performance and drivability. When the throttle body door is closed, all that pressurized air has nowhere to go - without a BOV or bypass valve, the air back-feeds to the turbo causing it to stall. The BOV is there to release the pressurized air and allow the turbo to keep spinning.

The stock Toyota BOV's are setup to recirculate the pressurized air - feed it back into the intake piping and keep the turbo fully boosting during shifts.


Damn, typed too slow!

This post has been edited by scothaniel: Dec 2, 2005 - 3:10 PM

[Shigexile]

does anybody wanna post videos of the bov?

[x_itchy_b_x]

i love my apexi dual drive. i have always liked there products.

[creis]

If you going for the loudest pushhhh I think the blitz onces are the best, but HKS bov's are sweet.

[ice23q]

http://www.turbosmart.com.au/

Have a look here.....loads of info and some very sexy waistgates too....

[zipstrips]

i prefer the old school style greddy S.. loud, fast valve, and be re-circulated if need/want to.

[Jaws4God]

so the stock 3sgte's come with a wastegate? it just recirculates the air? so in order to hear the released air, you have to get a bov?

does anyone have some pics? I am trying to understand all this :-)

[afroman]

a bov and a wastgate are 2 seperate things. wastegate is on the turbo and allows ehaust gases to bypass the turbine so not to over boost and bov vents pressurized intake charge so not to cause compresser surge. sum up wastegate =exhaust and bov=intake
-Aaron-

[scothaniel]

No offense, but I think you may need to review the basics:
http://www.turboclub.com/turbotech/TurboFun1.htm

Page 4 gives a great explaination.

[afroman]

was that at me or jaws
-Aaron-

[scothaniel]

Oh, that was for Jaws, you just beat me to a responce. Your spot on, but I'm sure you already know that.

[Jaws4God]

sorry guys.. i've never really learned about turbo's.. and all until last weekend never really realized i'd be putting a 3sgte in my car :-) so now i need a crash course in them..

i was just mainly wondering what a stock 3sgte will have for bov and wastegates.

Thanks for that link to the turbo info :-)

[NGHTKD]

[u]Blow off

This post has been edited by NGHTKD: Jul 5, 2011 - 8:55 AM