Now own an 02 VRS which has the piper intake fitted and now has a Forge recirc valve. Originally it had someone bodge a pigeon mod. But from cold now even though it's sorted with the Forge valve I can hear the turbo blades sound like they are touching the housing. It's only until it comes on boost but sounds like the mod killed the bearings in the Turbo. Could be wrong and it could be just wear and tear. No lag with the recirc valve and with the Forge one you get a choice of having it make the noise or blanking it off so it doesn't make a noise.

Still love the car even if I may be looking at buying a Turbo due to what could be the pigeon mods fault?

Motorsport don't run BOV's or dump valves. Boosts typically regulated via external waste gates; depending upon strength of springs inside of them they react the same way as our own recirc valves and they "flutter" under pressure. Prime examples would be WRC cars. Those cars turbos are designed to boost straight away and to be fair; it doesn't matter about 'stall' on them as the fuel being pumped in (anti lag) keeps the exhaust side spinning regardless.

But in hindsight Motorsport teams rebuild engines/turbos between rounds so make of that as you will : )

Motorsport don't run BOV's or dump valves. Boosts typically regulated via external waste gates; depending upon strength of springs inside of them they react the same way as our own recirc valves and they "flutter" under pressure. Prime examples would be WRC cars. Those cars turbos are designed to boost straight away and to be fair; it doesn't matter about 'stall' on them as the fuel being pumped in (anti lag) keeps the exhaust side spinning regardless.

But in hindsight Motorsport teams rebuild engines/turbos between rounds so make of that as you will : )

X• double post - you gotta love mobile posting •X