oil cooler adaptors, 3/8 vs. 1/2 inch sandwhich style Options

[realred914]

looking for a good sandwhich adaptor to add an oil cooler. want one with a thermostat built in, I see several brands for sale, there are some big price differances too.

at any rate there are some ones that have 3/8 inch NPT inlet/outlet threads, and others that have 1/2 inch NPT threads inlet and outlet. the price differenace is considerable (nearly 3X)

seeing as the oil passages upto the filter are not all that fat anyway I figure, how much benifit would one get out of a 3/8 NPT fitting verses the 1/2 NPT? I still plan to use AN10 hose and fittings and have 1/2 inch NPT on the oil cooler itself, so the biggest restriction in the new system would be the 3/8 NPT fittings on the sandwhich adaptor. will this be a significant flow restriction or not verses the larger adaptor? the engine will be a daily driver motor, not a high rpm race motor.

[DanT]

I had a mocal sandwich adapter on my racecar....with integrated t-stat.
ran the oil lines to the front trunk with a 25 row oil cooler and a large electric fan....work great and never had heating problems...fan was hooked up to my foglight switch... (no fog lights on racecar (IMG:style_emoticons/default/smile.gif))

I will eventually mount a cooler in the rear somewhere on my current '75. Probably will do another sandwich adapter with integrated t-stat. some sort of fan on the cooler for stop and go traffic, since this is my DD. (IMG:style_emoticons/default/biggrin.gif)

[realred914]

I had a mocal sandwich adapter on my racecar....with integrated t-stat.
ran the oil lines to the front trunk with a 25 row oil cooler and a large electric fan....work great and never had heating problems...fan was hooked up to my foglight switch... (no fog lights on racecar (IMG:style_emoticons/default/smile.gif))

I will eventually mount a cooler in the rear somewhere on my current '75. Probably will do another sandwich adapter with integrated t-stat. some sort of fan on the cooler for stop and go traffic, since this is my DD. (IMG:style_emoticons/default/biggrin.gif)

tradisrad did a think it was a 72 plate cooler with a six inch fan, mounted up above and too the side of the tranny under the rear trunk floor. works like a charm, 180F temps all day long he used the mocal thermostat adaptor also.

for price reason and availability I wil probably go with a Derale 15702 or a hayden 205 thermostat sandwhich adaptor, both have 3/8 NPT ports, and about half cost of the mocal. hayden can be found for a low as $30 at Summit, Derale is priced $45 at summit