Originally Posted by nsld

With regard to the noise element of exhausts a performance exhaust will be louder for the simple reason that there is less stuff in the way of the exhaust gases to dampen the rate of flow. Lets grasp reality here, no exhaust manufacturer is going to "sounds great, performs like a sloth with a hangover!"

Whats the point of buying a performance car and then adding stuff to it that will make it slower? If you want a noisy slow car buy a Nova and stick one of those catering bean can jobs on the back!

Just banging a dump valve on a performance car without looking at any of the other factors involved (gas flow, mapping etc) and at best you get some lumpy performance, at worst with the potential for over fuelling you bbq your catalytic converters and have a big bill come MOT time.

Maybe its that I am old and thought the fast and the furious was a pile of steaming baboon toss but the only reason we ever had for doing to stuff to engines and exhausts was to go faster, from putting araldite in the dish of mini pistons to increase the compression (very stupid) through the cherry bomb exhaust etc etc.

Dump valves are really just attention seeking items, why not have a tannoy rigged up to the gearbox thats shouts "oi oi gear change!" every time you change gear! Now that would be different, plus the reverse cap passenger can take a break to pick the flies out of his eyes from hanging out the window going "PSSSSH" !

The recommended condiment with the above paragraph is salt, pinch of!