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I have a stock radiator(layed forward)with a very large sucker fan mounted to the back.I have a Flowcooler aluminum pump,180 windsor thermostat with bypass hole restricted to 3/8".The motor made 340hp at the wheels on a DynoJet dyno.It runs 180 to 190 in heavy traffic in 85 to 90 deg.weather.The problem is when I went to the Pocono track event I ran it pretty hard for about a half an hour and it over heated pretty badly.After that it would overheat after about 15 to 20 mins.. I figured this was because of air trapped in the system after I refilled it at the track.My question is ,should I concider a new aluminum radiator with twin sucker fans ,or something else?
Thanks,
Ron
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If I understand your parts list correctly, you'r running a 351-W thermostat with some sort of restrictor in the bypass hole? If this is true, it means that the bypass hole is always open to some extent, and "bypass" means that the system is routing water around the radiator, bypassing any cooling. By cutting the hole down from 5/8" to 3/8, all you've done is lessen the volume of water that never gets to the radiator. I suggest you either use a proper 351-C thermostat, or plug the bypass totally and see if one or the other helps your open-track problem. As it is now, you're handicapping the cooling system, and we don't have much margin for such.
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