Hi im currently using the bailey piston dumpvalve with no problems at all, but the other day i heard a erst with a different sounding dump valve like a rally car one like a chatter sound instaed of pissstttttt!!, i know the bailey one wot i have is ok and the best for idleing problems but its bugging me on which dumpvalve it was, and it werent a efi engine in it either!!.
Thanks