Remember years ago, Renault (iirc) brought out a hot hatch that you could adjust the exhaust tone which played through the speakers, just thinking as you accelerate in the van, use a slide whistle to replicate the sound of the supercharger (only in one direction obviously) I know smart right! Then put a drummers symbol on your passenger seat and as you let off the throttle give it a whack, did someone say dump valve?
Right my work here is done, off to help others with my smartness, maybe I'll advise @Soundz about his electrical set up
you should bro I might get fried soon ......wots a drummer symbol bro............with care you answer my friend .great care🤣
TBF i'm good with Will's advice mine sounds like a ruddy tractor too sure it pulls like hell an for an old bus amazes me .but yeah sounds like a tractor.....ha and fits right in for a country boy
Tom warmest of welcomes.......please forgive 'em mate they are wayward souls