blue on the pipes

rollingsculpture

Senior Member
taken from a quote from desotoguy

I suppose that if you have 15 grand to put into a Model A engine you don't care if it never seemed to run exactly right. The blue on the pipes may be a clue.

hmm as far as i remember from trying to purposely get those colors solid accross a thin sheet of metal using a kiln the coloration achieved magenta coming up first around 490 and the blues 550 degrees or so

my question is what should be expected to be the normal exhaust temprature
 

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Happens a lot on motor cycle pipes that are not double walled.Also an indication if a slightly lean mixture in carb. OMO. ken ct.
 
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