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Registered
Join Date: Jan 2006
Location: San Diego
Posts: 216
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Oil Pump Differences?
The manual says to not use a late oil pump on an early engine as there are differences in the pump and crankcase. The early and late pumps look the same to me except the toothed gear in the late pump is missing three teeth.
Does anyone know what the differences are? Thanks
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Jim Richmond 944 Spec race car, SoCal NASA & POC 01 Boxster S |
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03-03-2016, 09:49 PM
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In the Fires of Hell.....
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I have noticed the exact same thing, Jim. I think it might have to do with the profile of the teeth or something subtle like that.
I have (I think) an early pump if you need one...
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PCA Instructor: '88 951S - with LBE, Guru chips, 3Bar FPR, 1.3mm shimmed WG, 3120 lbs, 256 RWHP, 15 psig boost |
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03-04-2016, 04:01 AM
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plays with toy cars
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I've read that the late pump has a higher flow rate.
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1983 944 - modded everything http://forums.pelicanparts.com/dto_garage.php?do=viewvehicle&vehicle_id=28317 '86 951 - under construction http://forums.pelicanparts.com/dto_garage.php?do=viewvehicle&vehicle_id=28374 |
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03-04-2016, 04:42 AM
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Registered
Join Date: Jul 2004
Location: Upstate New York
Posts: 3,269
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Hey, Jim,
Measure the difference in thickness of the pump gear... You will see that the later pump gear is thicker, resulting in more oil flow at the same RPM. gb
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Good luck, George Beuselinck |
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03-04-2016, 04:53 AM
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944 Turbo
Heidi the NA
