Evolution wrote :
if u had experience an an atmo bov that gives no diffrence, say it out and be humble enuf to ask 'why' not just draw ur own conclusion without some brainstorming. becos i think i can tell u how u can solve this puzzle. as i understand where u r comming from. i too had experienced no diff in performance after installing an atmo, but i found the cause of it. and it became great after rectifying the problem. i was just waiting for someone to pop this question...
This post has been edited by E V O L U T I O N on Dec 17 2004, 00:25
vestax wrote :
well frankly i`ve never thought of changing my stock bov , cause no point , im not the type who fancy the bov sound , and im happy with my stock bov cause , while gear shifts i don't have thick black smoke puffing out from my exhaust . and for your information , if you do a search on the net check for 1G crush blow off , its a stock vr4 bov which has been crush to take up to 17psi before it leaks . if without crushing it , it will hold up to 12psi . so i don't see the point of changing mine , cause it can hold up high amout of boost and the best thing its quiet .
oh yea i`ve been runing stock bov close to 2 years aready and im happy with it
here are some additional explanation on the net .
If you plan to "dump" or vent your BOV to atmosphere (instead of recycling into the Turbo) while using your stock MAS, you will encounter some problems. The DSM MAS senses air going thru it and the ECU (car's computer) calculates the amount of fuel to add. If you "dump" this air instead of re-circulating it into the intake, the computer will add too much fuel and you'll probably see a puff of black smoke behind you. Also since the RPM drops FAST, if you leave the clutch in too long, your ECU may not be able to pick up idle and the engine may die.
Evolution wrote :
let me get 1 thing strait, bov leak is NOT equal to bov release a.k.a "pisssh"
the so called leak is actually a safety feature to prevent over boost that is harmful to ur engine, just like internal wastegate.
assuming u have an engine that is super strong and will never ever blow no matter how high a boost u run on. then there is actually no point in having pressure release valves like waste gate and bov 'leaks' becos more boost simply means more power and thats always a good thing.
a leak hapens when ur trottle is open while a pishhh happens when the trottle is closed. both serves a diffrent purpose therefore leak is not relavant in our discussion. im sure u know this.
im using atmo bov and i also do not have a thick black cloud of smoke when i change gears. and my engine does not stall either. and i dont have an safc to cut off fuel supply when trottle is closed either.
why is it i dont experience the bad side effects of atmo? on top of that, i enjoy power gain.
what u quote in the article and the bad side effects is true, if:
-u have a non adjustable atmo bov and it does not suit the engne u put it on
-u have an adjustable atmo bov but did not make use of its adjustable feature to adjust to suit ur engine correctly.
what do u think the adjustng screw is for? volume control?
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evo 3 ,
no la im cool and always be , but some people , get work out for notting .
anyway evolution , you ask me to be humble enough to tell , so i did , i told you my reasons for not using an aftermarket bov , cause the standard bov can sustain high boost also and i`ve explain the term crush in there but you don't accept what im trying to tell u insted you tiu kau me for talking about leak , and you say leak is not relavant in the discussion , then you had just teach me that the leak is one of the safety fetures to prevent over boost :rolleyes: , if leak is the safety feture then what is boost cut for ?
