The other thing people fail to clock is that cars that have recirc valves as standard, are usually meant to have recirc valves if you upgrade - as the ECU accounts for the extra air being dumped back into the intake and ups the fuelling according to prevent the mix from being too lean. If you vent it atmospherically, you're wasting petrol, the only sideline benefit is that you can enjoy the odd flameout if your exhaust is a freeflow one and is hot enough - my SX used to do this all the time

Not to mention the advantages of that excess fuel washing half the engine oil off the cylinder bores every full chat upchange!

Chris

Much easier and cheaper to shout 'whoosh' every time you change gear.

Off topic - I got slated for calling the throttle a valve in the running in thread - looks like one in that diagram.

its a butterfly really

I've had this descusuin lots lately at work after my mate fitted a Dump Valve to a Ibiza diesel

He rekons it reduce's turbo wear??

any comments on this?

I've had this descusuin lots lately at work after my mate fitted a Dump Valve to a Ibiza diesel

He rekons it reduce's turbo wear??

any comments on this?

Yes. He's talking out of his **** and obivously has

a) more money than sense

no idea how cars work