boost controller and the BOV

[justin0469]

ok so how does a boost controller actually work? i guess i was under the impression that basically it allowx a certiain amount of pressure in the turbo system before it lets it go, but thats a BOV...

 

[marcmsj]

ok so how does a boost controller actually work? i guess i was under the impression that basically it allowx a certiain amount of pressure in the turbo system before it lets it go, but thats a BOV...

without going into too much detail..

the boost controller bleeds off pressure before it gets to the wastegate actuator (the actuator is what causes the wastegate to open, and that's what regulates boost and how much of it you get... 10 psi or so on a 1g for example) the actuator is set to open at a specific pressure and that pressure only, so what the boost controller does is pretty much "trick" the actuator into seeing less pressure then is really being built up by the turbo so that it keeps the wastegate closed for longer so you build more boost.

the bov is designed to release built up pressure in the intake tract in between shifts (or whenever you let off the gas really) so that you don't get compressor surge (compressed air pushing back against the compressor fins on the turbo.) basically it's there to help you spool faster in between shifts.

hope that made sense... ask if it didn't

 

[justin0469]

sorry my key between te G and J doesnt work so bear wit me.

[No. Keyboards are $9. Come back when you have a new one This isn't a Benny Hill skit.]

 

[-silencer-]

The boost controller can let a little or a lot of boost slip by.. it helps control how much is allowed in the system. If the boost controller only allowed you to raise the boost without letting any get by.. can't you see there'd be a problem? It doesn't lower the boost when it lets air by.. it just helps to maintain a maximum boost level in the system when there's excess pressure.