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Re: Re: Re: straight pipe burns valves??????
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Posted by Dr.EVIL on July 02, 2003 at 10:26:04 from (12.4.181.2):
In Reply to: Re: Re: straight pipe burns valves?????? posted by Steve - IN on July 02, 2003 at 09:31:13:
The intakes of course run MUCH cooler but I read 20-30 yrs ago that exh. valves in a gasoline engine typically run red hot when working. The exh. valves are just made from a real good grade of high nickel steel, maybe a little cobalt & tungsten added as well. Actually, late model emission controlled engines run cooler than pre- emission controlled engines due to exh. gas recirculation, to "Cool the Burn" because Oxides of Nitrogen (NOX) production is much greater at high combustion temps.
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