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Irrationally exuberant
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Why are GT3 oil pumps so big?
It makes sense that an air cooled 911 engine should have a big oil pump because it's really doubling as the coolant pump as well.
But why didn't Porsche reduce the size of the pump (and save associated power losses) once they went to water cooling? Just curious. -Chris
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'80 911 Nogaro blue Phoenix! '07 BMW 328i 245K miles! http://members.rennlist.org/messinwith911s/ |
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03-12-2008, 08:30 AM
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Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
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Chris,
Those pumps are big to move the necessary volume of oil in both pickup and scavenge modes especially when the drive ratios are fixed. Given the peak RPM of the GT-3 engine and its racing variants that rev to 9800, the oil pump cannot really be downsized without compromising flow and durability.
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Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
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03-12-2008, 04:12 PM
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The Blue Pheonix
