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Re: Bypass valve effectiveness?
In a message dated 97-11-06 13:48:19 EST, you write:
But that's exactly what I was talking about.... if I do not release the
throttle all the way during shifting, the compressor keeps spinning and
there is no pressure spike in the intercooler. I mean is there any
_other_ reason for the bypass valve?
You don't need to go anything more than Manifold vacuum to get a spike,
graydon. That doesn't mean closed throttle necessarily, you reduce it, you
don't eliminate it. If you are spinning a turbo in the 2.0bar range, you have
put unecessary load on the turbo bearings and cold wheel when NOT using a
valve. Just about every production turbo car uses them after 1989. A simple
and effective weapon to extend turbocharger and turbo bearing life expectancy.