What is a pyrometer gauge?

it measures exhaust gas temperature--you will see the sender just behind the turbo in the exhaust pipe

 

So with the new "regen" BS with the "higher standards" engines and EPA requirements...are they still using the pyrometer, or does the "regen" process create a temp range in the clean out to high for the gauge?

And...(I'm feeling very wordy today)...what range should the pyro be at for good and bad areas?

 

really making me stretch the memory-----the new regurgitating engines i have no idea--the pyro i am used to was on old stars with cummins 400 big cam---i am thinking 1800 degrees seem to ring a bell --not to esceed that temp

 

my honest thought about the pyro guage is---so what---like what you going to do about it--its not like an aircraft engine where you can run it richer on fuel --the only thing you can do is back out of the throttle if it gets hot---and i dont know how often that would happen--but it would give an indicarion of engine/turbo problems --if you see it progressively getting higher
guess what i am saying--its like a diff temp gauge--i wouoldnt worry about it-unless it spiked---just another gadjet

 

1200 is the max over that and parts start melting

 

Depends on where the thermocouple is mounted. 1800 after the turbo is WAY too hot in the manifold, IIRC it's like 300* difference between pre and post turbo.

Only for extended periods of time. The only part that's actually that hot is the air. Oil spraying on pistons and water in the head keeps most things alive. Have seen several pickups peg a 2200* pyro for a while while sled pulling with zero damage when torn down. Not saying you want to make a habit of high EGT's but short bursts won't hurt, like to blow someones doors off!

 

thanx--i couldnt remember the numbers that was so long ago--think about 1980--and i havnt seen a pyro since--other than egt on aircraft