Bov's And Boost

[banhzSIIR33]

hey there my fellow skyline enthusiast,

i have a r33 s2 gtst... and it is relatively stock..

however, it had an aftermarket bov which was attached one of the intercooler pipes..

the stock bov was still in place but was blocked off (top hose was cut and a screw put in there)...

i removed the aftermarket bov and put the stock pipe back in to see if there was any difference..

besides getting a little flutter action.. i noticed my car was a bit more responsive.. no change in boost level or anything...

and today i got a spare hose and reconnected the stock bov... my car was current boosted at 9psi..

so went for a drive.. and and gave it a bit of gas and saw my boost gauge hit 15psi... and i it wouldnt rev past like 4500rpm or so... im assuming i hit the fuel cut at boost levels that high...

so my question is... how did reconnecting my stock bov bump up my boost so dramatically?

[neo32]

lol did u unplug the line to your wastegate to plumb back in your bov?

[banhzSIIR33]

lol did u unplug the line to your wastegate to plumb back in your bov?

ahh... do u mean the one from the actuator? i plugged it back into the intercooler pipe...

[R33S2]

What he means is the actuator working? It sounds like it isnt because your boosting continually and that seems to be the actuator not responding to whatever limit the boost controller is set to.

Connecting the BOV doesnt effect your boost level, your boost controller does that and if you have not connected it you will just continually boost.

EDIT I just read your last post.... you havent connected the boost controller, it is next to the pwr steering res.

[banhzSIIR33]

What he means is the actuator working? It sounds like it isnt because your boosting continually and that seems to be the actuator not responding to whatever limit the boost controller is set to.

Connecting the BOV doesnt effect your boost level, your boost controller does that and if you have not connected it you will just continually boost.

EDIT I just read your last post.... you havent connected the boost controller, it is next to the pwr steering res.

im not running a boost controller man... im using a hks actuator to control my boost... it was set to 9psi before i took out the aftermarket bov... and wen i took the aftermarket bov off and reconnected the stock bov... the boost went up past 15psi... i dont have the boost solenoid either... just actuator to intercooler pipe..

i have readjusted my actuator to 10psi now... boost comes on much earlier now.. and kicks in harder..

just weird how it jumped up so dramatically...

Edited May 10, 2009 by banhzSIIR33

[R33S2]

ah well maybe the old BOV was leaking pressure, my standard one did but it was only 3psi.

[SLAPS]

The std bovs are quite good. Block the little bleeder hole in them and they work as well as a tight 'good' aftermarket.

I blocked my std bov off some time ago as I don't see the need for one + I prefer the slight dose noise over an airy whosh bov sound.

Edited May 10, 2009 by SLAPS

[banhzSIIR33]

my car used to take a while to reach 9psi... now it gets to 10psi in no time...

i guess it'll just be a mystery bov thing...