Is there any reason why a dump valve should loose its noise?
I have an hks super sqv and noticed tonight it didnt seem as loud as usual,it has the purple bit inside which meant nothing to me when i bought it but have seen inserts for sale since giving a different sound.The purple one for high pitched.
It has sounded the same since it was fitted about 1 year but tonight it seemed to sound different,lower pitched and shorter blasts.
ive also noticed that the valve can turn.Never noticed it turning when i fitted it,it seemed prety solid so i wonder if there is a seal gone or something although i cant feel any air escaping when revving eng.
has anyone any ideas?
does anyone elses turn?
[8-)]