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3 result(s) to your search. (Rejection)
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kitcarbp
Fri March 6, 2009 7:29am
Rating: 9
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Ford_Raditor_Heat_Rejection_Chart- Street Rod Example
This chart compares the heat rejection rate (cooling capacity) of three different types of radiators tested on an old Ford Street Rod. Coolant flow rate is held constant at 7 gpm (typical flow at idle perhaps, not sure where its being measured ???). It graphs the heat rejection for each radiator versus air flow through the radiator core. It is comparing 3 diff rad designs/materials at different CFMs through the core. The more air flow you have for a given coolant flow rate (7 gpm in this example) , the higher the heat rejection, basically linear in this example. The author of this graph is most likely selling the high efficiency radiator showing the improvement over the other two designs. To sum it up, the radiator at the top of the chart appears to be the most efficient at a low coolant flow rate (7 gal/min) over all air flows tested. Ya see how important rad core/tank design is? I learned something here.
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kitcarbp
Thu March 19, 2009 10:30am
Rating: 10
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500+ HP Engine Water Jacket Coolant Flow Requirements
This chart shows the linear relationship between the heat rejection (load) of the coolant and the required (calculated) coolant flow in the engine water jacket. It is determined for 3 different temp gradients of the engine inlet and outlet coolant temp. This engine example is from a 500+ horsepower supercharged gas engine assumed to have heat rejection up to maximum power (8,000 btu/min). Why do we care? If you cant keep engine temps under control at speed under load, you may have: 1) insufficient water flow, 2) undersized radiator, or 3) insufficient air flow through the radiator that needs to be addressed. This engine will require coolant flow in the lower part of the curve in street applications (low heat rejection), but for racing/track use this engine will require coolant flow rates towards the top of each curve. For older V8's pre-emissions, the common design target is to keep the radiator Inlet @ 190 F and outlet @ 180F or an average core temp of 185F at steady state conditions or the upper curve shown. Modern engines may use a little higher 195F-185F or rad core avg temp of 190F.
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jbcobra67
Mon October 4, 2010 11:55am
Rating: 10
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Headed for Inspection Rejection
Yes in Louisiana you have to get a rejection before you get your tag, title and registration.
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