I am in the process of a oil cooler design for my track nsx. My first attempt fit in the side scoop cavity and used a Setrab duel pass cooler sealed against the engine cooling fan that was boosted to 18.5v. A 220 deg oil temp switch turned the whole thing on. It was light, compact and when the fan kicked on it pulled a lot of heat out of the oil. The delta track data was unable to log because of the turbo ecu problems and could not stay out on the track long enough. After adding a mecanical oil pressure gage I found the duel pass cooler was too restrictive with a max of 62 psi/7000 rpm. Now, here is my question. I am going to a single pass slightly smaller cooler that has 46% more flow but with the engine putting out more volume at 80/90 psi WOT it still might fall short. I know these things are a trade off but what do you think the min oil pressure should be at WOT. I can not move the cooler up front, the tunnel is filled up with the aftercooler lines and I would most likley have engine overheat problems if another heat exchanger is added up front. The side scoop area is tight and a real challenge for fitament but I will have somthing by NSXPO. Happy 4th. Dan
Oil cooler selection
- Thread starter tunapie
- Start date
First, head over to www.nsxbuilder.com and go to "The Latest" and click on the oil cooler link. Good info in there for you.
Recap: Minimum 10 PSI of oil pressure for every 1000 RPM (stock is around 100PSI). If you keep WOT=80+ PSI you should be OK, up to a point. When you start getting over 400HP you may want to bump that minimum 10 PSI to 12 or more. Forces on the crank can squeeze the thin thin thin oil layer out of the bearings if the pressure is too low.
As for a cooler. oil to water might be the better way to go, and I know Mark johnson is working on one that goes right into the coolant lines in the engine bay. Get ahold of him for more info.
RealTime had an oil to water cooler in the trunk, and an Accusump. Good enough for them, good enough for you.
-ed
www.nsxbuilder.com
Recap: Minimum 10 PSI of oil pressure for every 1000 RPM (stock is around 100PSI). If you keep WOT=80+ PSI you should be OK, up to a point. When you start getting over 400HP you may want to bump that minimum 10 PSI to 12 or more. Forces on the crank can squeeze the thin thin thin oil layer out of the bearings if the pressure is too low.
As for a cooler. oil to water might be the better way to go, and I know Mark johnson is working on one that goes right into the coolant lines in the engine bay. Get ahold of him for more info.
RealTime had an oil to water cooler in the trunk, and an Accusump. Good enough for them, good enough for you.
-ed
www.nsxbuilder.com
Is there a good way to install a oil temp monitoring device in the stock oil system? Anyone use a sensor at the drain plug?
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