Aerochargers are better than (insert compressor)

[Greg Hermann]

Think you missed my point, Clay.

With this controller, the waste gate would be WIDE open at idle and cruise
(for LOW back pressure), and only close when there was demand for boost
(significantly opened throttle) , then begine to bleed as boost hit its
set-point.

My concern is that the vlave poppet in the waste gate might run a LOT
hotter than intended with so much off seat time--- but maybe not.

Greg

At 9:39 PM 10/18/01, clayb wrote:
>> From: bearbvd at mindspring.com (Greg Hermann)
>>
>> It would be pretty interesting to use this controller to operate a >
>>conventional waste gate on a conventional turbo--but one has to wonder >
>>whether the valve in even the best of the conventional waste-gates would
>>> live with such a high percentage of its time spent "off seat"!
>
>It works just fine with a conventional wastegate and turbo. If you can
>imagine an application with big turbos, anytime you're running a paltry
>5-10 psi, the wastegates are bleeding. It isn't the throttle blades that
>control the power, it's the wastegates.
>
>The valve guide housing on a good wastegate (like Garrett) is heavily
>finned in cast iron, to address the valve issue you mention.
>
>Also, standard turbos, when well matched for the application, perform
>very well. I have to believe a nice, aerodynamic exhaust housing and
>turbine will be more efficient than an aerocharger, over an admittedly
>smaller RPM range. You makes your tradeoffs. I'm sticking with turbos,
>non-VNT. Boat application gives me more leeway with the (slightly)
>narrower peak boost range, also.
>
>- Clay
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