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Ls cooling
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<blockquote data-quote="mrdrinksalil" data-source="post: 735640" data-attributes="member: 2200"><p>The LS cooling system differs from SBC motors in that the thermostat is at the inlet of the pump (coolest point), not the outlet of the manifold (hottest point). Coolant flow over the thermostat comes through the heater core circuit (that many of us block off) and/or through the bypass check valve on the back of the thermostat. The bypass always bypasses some coolant to open the thermostat OR bypasses full pump flow if the thermostat is closed. The stock 187ish thermostat only starts to open at 187. If you can start to open at 160 it gives the coolant a head start to circulate and cool.</p><p></p><p>When the thermostat IS open it's combining with heater core flow (possibly blocked off) and cool water from the radiator. If your radiator is cooling better or more than full open temp of your thermostat, the returning coolant is fighting to close the thermostat. IMO this is why some have better performance NOT capping the heater core circuit and running the loop hose.</p><p></p><p>Clear as mud?</p><p></p><p></p><p>Sent from my iPhone using Tapatalk</p></blockquote><p></p>
[QUOTE="mrdrinksalil, post: 735640, member: 2200"] The LS cooling system differs from SBC motors in that the thermostat is at the inlet of the pump (coolest point), not the outlet of the manifold (hottest point). Coolant flow over the thermostat comes through the heater core circuit (that many of us block off) and/or through the bypass check valve on the back of the thermostat. The bypass always bypasses some coolant to open the thermostat OR bypasses full pump flow if the thermostat is closed. The stock 187ish thermostat only starts to open at 187. If you can start to open at 160 it gives the coolant a head start to circulate and cool. When the thermostat IS open it’s combining with heater core flow (possibly blocked off) and cool water from the radiator. If your radiator is cooling better or more than full open temp of your thermostat, the returning coolant is fighting to close the thermostat. IMO this is why some have better performance NOT capping the heater core circuit and running the loop hose. Clear as mud? Sent from my iPhone using Tapatalk [/QUOTE]
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