Re: [A/S] Two questions

[Jim Dunmyer <jdunmyer@xxxxxxxxxxx>]

Tom,
  A pyrometer is basically an exhaust temperature guage. Some have the 
probe mounted ahead of the turbo, some are after; it makes no difference 
except that a post-turbo setup will read about 300 degrees cooler than 
pre-turbo.

The pyro tells you how hard the engine is working and when it's 
approaching the danger point (melting pistons). The danger point is 
about 1300 degrees on a pre-turbo pyro, according to what I've read. If 
mine reaches that point, I force a downshift by hitting the OD lockout 
button.

I've never seen a pyro from the factory, mine is from IssPro and is 
mounted in/on the 'A' pillar, along with the trans temp and boost 
guages. (the 'A' pillar is the door/windshield frame) Mine is a DIY 
installation that took about an afternoon to install. I had put the 
trans temp pickup probe in the pan earlier and had the wire run to under 
the dash. The boost guage connects to an existing fitting on the intake 
manifold, but I had to drill & tap the exhaust manifold for the pyro 
thermocouple.

If you want to see such a setup, go to http://www.genosgarage.com, they 
have stuff for both Dodge and Ford Diesels.

                             <<Jim>>