homemade BOV?
 

Has anyone here other that weir made their own BOV? ive seen his on H-T and it looks pimp, I'm in the process of making one just for shitd and giggles outta PVC plastic....

thats what happens when you dont have anything to do on march break

if anyone has pictures of one you built post it up, i'll post pics of mine when im done

Re: homemade BOV?
 

WeirRacing built his own. If you search you'll find the thread

Re: homemade BOV?
 

yeah i saw that thats where i got the idea, i was just wondering if anyone else has?

Re: homemade BOV?
 

A guy I know made a couple of dump valves.

http://forum.vwsport.com/pics/data/500/220bov2.jpg
http://forum.vwsport.com/pics/data/500/220bovexp_2.jpg

Re: homemade BOV?
 

radiator cap from auto parts store!


sounds crazy when it goes off!

more of a bypass valve kinda tho

Re: homemade BOV?
 

Just take a Bosch BPV and run it open. You'll get a huge sound....

It's kinda ricer, but hey...:)

Re: homemade BOV?
 

Really? How can you get a vaccum source for that?

Re: homemade BOV?
 

i really dont understand the use of a vaccum source on a BOV can someone explain this to me, wont a BOV function wil no vaccum at all? someones gotta explain this to me

Re: homemade BOV?
 

The vaccum pulls the piston up, allowing the excess boost to escape.

Re: homemade BOV?
 

i always thought the extra pressure from closing the throttle plate was what opens it, or is it a combination of the both?

Re: homemade BOV?
 

Vacuum pulls it open....

Re: homemade BOV?
 

so the vaccum on a wastegate will do the same when you close the throttle plate?

is this is ture everytime i let off the gas all the way the wastgate opens

Re: homemade BOV?
 

Wastegate actuator is set to open at a certain pressure based on signal from the boost pressure solenoid, or if you have a pretty primitive system, it can he run on straight vacuum....

Re: homemade BOV?
 

wastegate runs off boost..bov runs off manifold vacuum..

Re: homemade BOV?
 

that makes more sensei understand now guys thanks, i was always under the impression BOV's opened from teh extra pressure when you close the throttle plate but it all makes sense now

Re: homemade BOV?
 

im sure we all thought a bit along those lines when we were noobs, but if that was the case, the bov would be open all the time, there is no extra pressure when the throttle plate closes, it is just going in the opposite direction now.

Re: homemade BOV?
 

Oh there is a pressure spike when you close the throttle. Have you ever had a responsive boost gauge pre-throttle?

Re: homemade BOV?
 

thank you to everyone for their help!