I was wondering (because I love the sound lol) if a blow off valve could be installed on a superchargered application. On a turbocharged car a BOV is installed to let out the air that is left in the charge pipe in order to prevent it from traveling back into the turbine and forcing the turbine to slow down or stop all together. Now, because a supercharger is a form of forced induction, it has charged air and is forcing it somewhere. A question to ask is, what happens to the forced air? Is there any left over air to be let out or what? I apologize in advance for the noob questions. I've just not read alot about superchargers. Please don't burn me for asking about BOV's for superchargers. Call me a ricer or what have you for wanting that noise, just don't f%&$ up my thread for wanting to know. Thanks in advance for answering or helping me out guys.

 

the supercharger is belt driven. so when you let out of the gas it stops making boost. also, the is a valve the directs air either around the supercharger or into the supercharger. and that valve runs of of vacuum. so as soon as you let out of the gas the vacuum drops.

so back to your question. no you cant but a BOV on a supercharger

 

Thanks for not just shutting me down. I'm glad you explained it for me. Like I said forced induction isn't my thing. =)

 

you are lucky for getting an answer....it is getting rare around here!!

 

yea, most people say "there is a search button" lol. There is a guy with a 350z that has a supercharger with a bov. However i think the supercharger is a C31 (i think its called that) and looks like a turbo, here is the picture of the supercharger


....here is the video
http://www.youtube.com/watch?v=wCUBbpBY2Fc

 

you can put a bov on a stock supercharger but it will take some work.you would have to want it just for osund.. first off u would need a custom bottom end for the supercharger and u need to modify the intake manifold so u would have piping after the blower then u could put on a bov and it would make the pssshhh sound ur looking for.. but in the end it would lose power for the noise( this was a quick thought on how it could work so dont quote me)

 

not bashing but if u want the swoosh sound, get one of those exxhaust bovs. my buddy has a sebring, and got the "corvette" exhaust, and he bought 4 of the exhaust bov and put one in each pipe, it was loud as hell when u were behind him but it sounded cool as hell when u rode with him lol.

 

actualy BOVs are used in other forms of supercharging, most common on centrifical supercharger systems (think vortech, paxton, ect). the key to it is the location of the compressor (supercharger) in relation to the throttle body. in turbo applications, the compressor is almost always in front of the throttle body, and as you know when you let off the throttle the pressure has nowhere to go causing compressor surge. in a centrifical supercharger setup most of the time the blower is before the throttle body, and when you let off the throttle pressure will build up and try to stall the compressor. being the compressor is belt driven the compressor wont simply stall out, it will cause serious damage to the blades. in these applications, BOVs are used, as just like a turbo application, pressure needs to go somewhere when you let off the throttle.

in setup that uses a positive displacment compressor (better known as a roots supercharger, or a screw style supercharger) the throttlebody is almost always in front of the compressor. when you let off the throttle air is no longer entering the supercharger, so there is nothing to compress, and the last of the compressed air goes through the cylinders. there is no need to vent the compressed air out as it doesnt build up.

turbo diesels work under the same principal, there is no throttlebody (fuel is adjusted instead of air to increase power) so when you let of the throttle, boost just flows through the engine.

 

ok so i just got schooled!!!!!!

 

Excellent. Thanks a bunch for denoobing me! Lol.