What causes high EGT in a cat diesel?
Diesel pistons are aluminum, and a growing number of diesels also use aluminum cylinder heads. We mentioned earlier that excessive EGTs are due to a rich air/fuel mixture, which can be caused by too much fuel. Too much fuel is typically the result of modifying a turbo-diesel for more power.
What temperature is 7.3 EGT?
General rule of thumb for EGTs is sustained up to 1200-1250*, bursts can go above that, but not for long. Sustaining above that, depending on how high you go, can start melting stuff.
Where can I get a cat 6nz performance kit?
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What should the pyrometer reading be on a diesel truck?
I just added a pyrometer (digital) to my truck (’91 F350, bone stock, AFAIK). Temps look like shat I am use to seeing on big trucks, until you nail it. I managed to get it to 1150 @ 60 MPH very easily, and 1250 by firewalling ot there. Normal? 700-800 on my 98 24V 5.9 2500 a approximately the same load. All these are turboed, tho.
What should my EGT be on my pyrometer?
I prefer to use ~1150 as a max temp but 1200 is safe and even a bit over that most likely. The max egt numbers have very little to do with the melting temp of aluminum – it’s coincidental that they’re nearly the same. The fact is that if your pistons get much above about 250-300* you’re in serious trouble.
What should the temperature be on a pyrometer?
Something to keep in mind is the location of the probe. The exhaust gases will cool as they travel through the system. The ideal measuring point is as close to the piston as possible. You’re measuring temperature at one point, when in fact the danger is further upstream.