yeh heres a vid of mine, way louder in real life!
http://www.youtube.com/watch?v=RwvG--ggAp0
This is coming up again and again.
Scremer pipes are for externaly waste gated turbo's.
The fake screamer pipes for internally waste gated turbo's seem to be turning into the next dump valve, i.e lads fit them to have a noise without any interest if what they are actually for.
oh lord realy! my days
screamer pipes on an internal wastegated turbo are pointless in my opinion the reason.if they are noisy at idle something is wrong either your gaskets are gone or exhaust gases are leaking out through the screamer pipe or your internal wastegate is fucked or leaking either way you car won't pass an nct if it is noisy at idle.
Someone tell me tho what would be wrong with welding up the wastegate penny and using an external wastegate it serves the same function as a boost controller and u get a class noise at full boost??apart from using the standard manifold whats wrong?
Is that a serious question?
Ok well put it this way, if you want to increase the bore of your cylinders do you just drill them out with a hole saw?
Turbos and manifolds are all about flow dinamics and welding up a place where the gas is supposed to and hoping that it will find its way out another way is just pure bandit.
The more technical reason is that the design of the standard manifold is one that flows the exhaust gasses towards the turbo in the best and most even way, so by cutting a hole in it and allowing the gas to escape through a retro fitted wastegate you'll be causing major pressure and flow issues within the manifold and the same is true of welding up the internal waste gate.