[BoostedRex]

i have the hks racing bov, and am running 4psi currently on my 1.5l dx d15b2 motor (92hp stock)

a little while after i got it i was kinda new to driving a turbo'd car so there are a few things i have in the back of my mind.

at a stop with the hood open i figured i would try to rev and make the bov sound off. so my dissapointment the car didn't even show boost on the gauge and there was neither a spooling sound nor any type of bov sound. although with just a small rev you can feel air come out of the bov.

do you have to have a cirtain hp engine stock to put enough pressure to the turbo to boost without being under a load or do most turbocharged cars do this?
or is there a trick to get it going, like do you have to start with a rev to 4000 and then another higher and higher until you hit red?
also, would it have anything to do with how much boost im running?

 

[GSRturbospec]

that would be something that i would like to know, my car is the same, i rev it and know blow off sound, i think that is how it is, but some cars i've heard the blow off

 

[SoFlaGS-T]

you have to be in gear to hear the bov... you need to rev the engine pretty high to hear the bov in neutral or at a stop... the turbo needs to spool up... just a little

 

[PSIKOTICsi]

i can flow it all the and the bov will make a little sound but realistically your car has to be in gear for you to really hear. you need boost pressure for the blow off valve to make a noise. the blow off valve will open and close as you press on the gas but you need to be boosting to make a sound.

 

[BoostedRex]

download this video of a 300zx tt that makes boost in neutral
all it takes for this car is one or two hard revs and the bov just goes nuts.

i think it has something to do with how powerful your engine is.

idle bov sound

 

[atghc]

My car gives a blowoff sound, but reads no boost cause there is not enough exhaust pressure. It needs to have load on it.

 

[jayvic]

Nothing like free revving the piss out of your car.

 

[MatT3T4]

It needs to have load on it.

yep