Re: Re: straight pipe burns valves??????

Posted by Terry on July 03, 2003 at 08:55:49 from (152.163.253.102):

In Reply to: Re: straight pipe burns valves?????? posted by Mike (MI) on July 02, 2003 at 05:21:58:

I don't think a straight pipe will cause the problem of warping or burning valves unless it is very short and the engine was being used to pull with. My experience is with car engines and headers that were used on them...for whatever reason back them (circa 1960's) it was easy for the header bolts to come loose and develope a header leak. During a hard run and immediately after letting off the gas pedal you would suck cool air through the leak. Valve heads would not handle the stress (shatter/pop off) and you would run the risk of dropping a valve or warping the valve. I say, it is possible. The straight stacks on these tractors are essentially no different than the mufflers but the muffler holds more heat and is less likely to allow cold air to get back all the way to the valve. I am glad you are so well educated.

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