This is a question for my mate with his S1 R33, is there anyway of modifying the standard BOV so that it makes a noise, Im not too sure with the standard R33 BOV's whether they are very loud or not, because his isnt at the moment. We did try by having the plumback pipe disconnected, but the engine wouldn't idle very well and would stall. We also tried by blanking the mount point off on the crossover pipe and running it just through the plumback pipe. I was concerned about my mates car getting flutter from doing this so I put the valve back on as standard.
Is the valve supposed to make a noise, even though it is plumback? My R32 BOV makes a hell of a noise and it is plumback...
How would I get it to make noise for him or should I just tell him to get an aftermarket one?