ProdriveSTI

Anybody watch used car roadshow last night on men & motors @ 9pm.

They were going on about blow off/dump valves & do they increase BHP etc....

They tested it on Blue STI - looked very nice 2!!

1st run without the D.V - was 19psi

then once it was fitted they done another run - only 18psi - it was leaking boost -
They did amend the spring pressure - but did not show another dyno run - I take it this would have made 19psi again??

Would do you guys think??

Dick Cheese

I didn't watch it, but it sounds completely pointless.

Graz

What an utterly pointless test...... There is nothing a dumpvalve can do to increase BHP unless the one it's replacing leaks at high pressure. Dumpvalve is there for one reason only to stop air bouncing of a closed throttle back towards the turbo and stalling it. It should make gear changes smoother and help the longevity of the turbo. That's it

Napedog

yeah i saw it when at work, that guy who co-presents is a total ****. everything he says is then proven wrong straight away. e.g. the prices he kept saying cars wud sell for in auction, 1 he sed wud go for bout£450 sold for a grand. wot a legend!