What is ...

[Steven]

After following this post for a long time I have to ask ... what is EGT and what do pre/post pyro meter, boost meter, fuel pressure and trany temp gauges measure. What would I be seeing other then a little needle moving back and forth?

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99 2500 Laramie SLT 4X4 QC auto 3. 55 LB stock (for now)

 

[bstrong]

EGT - Exhaust Gas Temperature. A pyrometer measures EGT's either before the turbo, or after the turbo. Pre/post refers to where the temperature probe(thermocouple) is placed on your rig. It is critical when adding additional fueling, so that you don't have a meltdown as a result of to much heat.

The boost gauge measures how much the turbo is pressurizing the air/fuel mix, and is helpful as a diagnostic tool.

The trany temp gauge measures the temp of your trany fluid, and is usually place in the cooler line exiting the trans to give the most acurate look at what the trans is doing. Temperatures above 200 F will drastically reduce the life of the fluid, and the transmission, and may indicate a problem starting.

Hope this helps,
Brian

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'97 3500 auto CC 4X4, 4:10, 40,000 miles, TST #8 slid forward . 030, Isspro pyro, boost and trans tmp on the A-pillar. Soon to have DTT TC and VB.

 

[Missouri Mule]

Steven,
Pre turbo gauge helps most with to much pedal/fuel and as Brian mentioned melt down.
Temps get to high you back off go pedal.
Same with boost gauge/Egt gauge if your pulling long grade with trailer in tow they let you know when to back off and down shift.
Post turbo gauge is used best with turbo cool down period (you let egt drop in temp before shutting off engine) this keeps bearings in turbo in good condition also helps out oil passage not crudding up in turbo. You can use either pre or post by adding or subtracting temps but setting up both would be ideal.
BStrong, I have to disagree with pressurizing air/fuel mix. It(boost gauge) only reads the air pressure as there is no fuel mixed with it(air) in the intake manifold. But you were so close. #ad
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Steven, the more boost(pressurized air = a volume of air that is compressed into a smaller space... ) the more oxygen molecules the better burning of fuel = more power = more exhaust(higher temps) = more boost.
Which leads to beleive that boost is pressure and volume.


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Bill Thomas
Missouri Mule - 96 Wht 4X4 ST CC,5 spd, 3. 54, 8 ft bed, 1 ft high cheater boards.
99 Freightliner bl/wht FL60 ISB-5. 9 24v,215 hp,520 tq,6 spd, 3. 59 nsr,16 ft box, 19. 5 tires,Wt/gvw 11,000/23000