external wastegate which sounds more ferocious?

[kschu]

nope......u need wastepipe to hv tat shhhhaaaarrrrrr.......hehehe

 

[GSR5559]

icic..means WP is to make the sharrr while the DP is connected to the exhaust and goes out all the way to the back..am i rite?
anyway if u need shaarrr u need this both item rite?

 

[kschu]

u r rite!

 

[GSR5559]

icic..jus an info fo myself..hehe.at least wen frens ask me wht is those DP and WP den i can answer them without any doubts..hehe..

 

[lan evo]

Originally posted by Battousai@Aug 5 2004, 15:39
A turbo has 2 outlets: the turbine outlet and the wastegate.

Gasses exiting the turbine outlet spool the turbo.
Gasses exiting the wastegate bypass the turbine blades, and do not spool the turbo.

On a stock turbo, the wastegate is internal, and is placed very close to the turbine outlet. So the factory downpipe can collect gasses from both the turbine and wastegate outlets. The problem with this is that gasses from the wastegate collide with gasses from the turbine, and therefore the exhaust flow is not efficient.

An aftermarket downpipe has separate pipes collecting from the wastegate and turbine outlet individually, therefore the gasses do not collide and flow is more efficient. BTW the pipe that collects from the wastegate is called the wastepipe. When it vents to atmosphere, it is extremely loud and referred to as a screamer pipe. When it plugs back into the main exhaust it stays more or less silent.

The benefit of aftermarket downpipes therefore is faster spool up (gasses flow out of the turbine faster) and less boost creep (gasses can flow freely from the wastegate).

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if fitting an external wastegate,is it the original wastgate bypass closed?

 

[kschu]

yup..........cos u hv ext w/g ma