External o2 Dump?
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From my perspective, an O2 dump is irrelevant when the flapper valve is shut closed on its seat. Since the fastest rate of spool is achieved with the flapper valve closed, then the rate of spool shouldn't be much dependant on whether the turbo is equipped with a conventional O2 housing, or an O2 dump.
There are several other factors which are more directly related to spoolup. As a practical matter, the dump tube enters the picture only once the flapper valve has opened. Fastest turbo spool can only be achieved with the flapper valve shut. Or am I way off?
There are several other factors which are more directly related to spoolup. As a practical matter, the dump tube enters the picture only once the flapper valve has opened. Fastest turbo spool can only be achieved with the flapper valve shut. Or am I way off?
Last edited by sparky; Feb 27, 2010 at 09:59 PM.
I have one they do 2 things. One if the turbo exhaust area is larger, like in my case 40% larger then OEM it will make more power plain and simple. Buschur himself tested a cheapo ebay unit for 15WHP gain. The Dump itself has better boost control as it isn't running into the exhaust stream, I GUESS it makes your exhaust more efficient as less is being dumped through it. The sound alone I love.
