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Aftermarket oil cooler-will it flow enough oil?
I have access, (probably free), to an 10 x 15 inch oil cooler with an integrally mounted, themostatically controlled fan. The only issue is that the coils are 1/2 inch inside diameter and I believe my 911SC has 5/8 inch inside diameter hoses. If so, will the lack of cross section hurt the oil pump with back pressure or in any other way cause problems?
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07-08-2001, 03:40 PM
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Registered
Join Date: Aug 1999
Location: Hickory NC USA
Posts: 2,502
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I know your dilemma well. In Bruce Anderson's book, he recommends at least Dash 12 AN fittings which is 3/4" IHMO, 1/2 inch is not recommended. You could run two coolers in parallel thereby having a combined area greater that a 3/4 inch cooler fittings. However, the plumping of such an arrangement is very expensive.
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07-08-2001, 07:40 PM
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Registered
Join Date: Jul 2000
Location: So. Calif.
Posts: 19,910
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How is the oil cooler constructed? Is it a serpentine-type cooler with a single fluid tube for all oil to pass through? If so, this may have too much restriction for the lube system. However, if there are several 1/2 tubes all in parallel with each other, than there would be less overall restriction. I would suggest not using this type of cooler unless there are "turbulators" within the tubes themselves to agitate the oil and break up the boundary layer as oil passes through; this provides better heat transfer.
Sherwood Lee http://members.rennlist.org/911pcars |
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07-08-2001, 11:39 PM
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