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Registered
Join Date: Jul 2008
Location: Baltimore, MD
Posts: 153
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Oil pumps 4 rib or 3 rib? 2.4
I am sorting all my items out to make sure I have everything ready for my build. I have 3 3 rib oil pumps and one 4 rib oil pump. Is one better in some way than the other. Books say 4 rib is better, but do not know if that is true and why?
Building 2.4 w/2.2 S pistons. Will go in my 914/6 and plan on running a front mount oil cooler as well. If it matters. Anyone have specs on the 3 rib vs 4 rib pumps? Which should I use and why?
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2000 VW TDI 224HP/400FT TQ. Pikes Peak World Record Holder 2007 "Fastest Diesel Car" 1973 Porsche 914/6 2.4L Engine rebuild in progress |
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10-19-2010, 08:41 PM
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Join Date: May 2008
Location: UK
Posts: 128
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IIRC the 4 rib is for engines with the oil bypass mod. Therefore the pressure side of the pump is larger and the scavenging return side is smaller....
So if ya got oil bypass mod, go with the 4 rib.
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/Nimskov |
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10-20-2010, 12:47 AM
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Location: Baltimore, MD
Posts: 153
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Yes, the bypass mod was just done on my case.
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10-20-2010, 04:18 AM
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Join Date: Oct 2008
Location: Nash County, NC.
Posts: 8,519
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The 4 ribbed as used through the Carrera
Bruce |
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10-20-2010, 06:00 AM
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I am doing the same build. I have the 4 rib oil pump and Ollies machined my
2.4 7R case with the oil by-pass. Vr,
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Bavaria911 1970 911T w/ 2.4S 1971 911T Targa w/ 2.2 RG Member # 818 |
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10-20-2010, 07:09 PM
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1970 Porsche 911 T
1971 Targa 911T
