Quote:
Originally Posted by rscurtis
Don't fall for the idea that you need a 15# cap for the system to perform properly. I ran my signature car with a 7# cap for years, and it worked fine. Now that I switched it to NPG, I run it at zero pressure. Much easier on the hoses, radiator, and heater core.
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What is NPG ?
Zero pressure... if that is really what you mean.... means your coolant will boil at approx 212 degree F...
Internal Combustion engines need to be at some temperature to be efficient and LAST a long time.... as the thermal expansion coefficients are figured into the sizes they are made... for instance.... many pistons are made in an oval shape to fit into round piston holes... because they expand more in on direction than 90 degrees to that... due to the piston pin and associated bulk associated with that.... they need to be at the correct temperature to be ROUND while they are ' working' or they do not seal with the side of that round bore like they should...