Retarded ignition will create a lot more heat in the exhaust.
----- Original Message -----
From: walt@hot-tr6.com
To: Don Marshall ; 'riverside' ; 'fot'
Sent: Monday, April 11, 2005 9:29 AM
Subject: RE: red hot headers
I run racing headers on my hot TR6 street/racing engine. Ron Meek, my
engine
builder, had the insides of my headers ceramic coated in an effort to pass
through some of the extreme heat past the headers and on out the exhaust
system. Seems to work well.
Walt Hollowell
Abq., NM
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net]On
Behalf Of Don Marshall
Sent: Monday, April 11, 2005 8:43 AM
To: 'riverside'; 'fot'
Subject: RE: red hot headers
Please respond to the whole list on this one. I had the same thing
happen the other day and figured it was too lean a mixture at low revs.
Now I'm curious.
Thx, Don TR4A
-----Original Message-----
From: owner-fot@autox.team.net [mailto:owner-fot@autox.team.net] On
Behalf Of riverside
Sent: Monday, April 11, 2005 1:19 PM
To: fot
Subject: red hot headers
fired up a fresh engine with tube headers last week and the
headers went to glowing red hot and 1000 deg F in about
2 minutes at 1500 rpm. shut it down. unfortunately, did not
have an air/fuel meter. last time i did a tractor motor with
cast iron ex manifold, we only got to about 650 and held there.
couple days later ran across an article saying that such a condition
is caused not by a lean mixture, but more likely cam timing or
rich mixture allowing the fire to still be going hard in the header,
don't recall ever getting a TR header that hot.
any comments from the engine guys in our group about the cause of
the glowing headers and hazards to continuous operation.
art de armond
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