That depends on alot of things. Gearing, compression, throttle body size and etc. But for me, id say about 50% or more....I usually don;t pay attention to that though so it might be 60%-70% throttle needed to actually use the boost.

 

Ok cool. That sounds good though. Will be nice to have some boost when semi getting on it I think.

 

My BOV closes to build boost at maybe 30% throttle. My VTEC is set at 4000 RPM and 25% throttle.

 

a centrifugal supercharger is always compressing air.

 

i have noticed that @ partial throttle my boost guage will usually go up to zero until and the more I apply the throttle it will start moving into boost. This means that basically the blower is making up for the vacuum the engine normally would have under light load.

 

Correct. ANother thing to note that I forgot to mention. A BOV/diverter will always go off with our kits on our cars. Some are more sensitive than others... The HKS sequantial for example goes off pretty much 100% of the time you shift...

 

What did you have on your car? Sounded really loud when spooling or building boost a little or something. Could hear it easily driving behind you.

 

[QUOTE=RAIN H8R,Dec 6 2009, 03:50 PM]That depends on alot of things.

 

The sc always whistles, that is what you heard...

 

S/C whistling (novi anyways) sounds very nice