EGT readings?

[jbritsch]

I just installed an EGT gauge(in the exhaust manifold, before the turbo) what kind of readings am I looking for? Whats to high, whats normal, and at what temp is it safe to shut down the engine??

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2001, 2500, automatic
30 ft 5th wheel trailer
Jim B. Pgh. , Pa.

 

[DHatfield]

My gauge reads about 550 to 600 degrees (pre-turbo at 60 MPH. As to what is high you never want to go over 1300 degrees, but I would not go over about 1150 (safety factor) for long periods of time. And you can shut your truck off as soon as the temp gets below 300 degrees. I hope this answers all your questions.

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2001 2500HD Quad Cab SLT SB 4x4, HO Cummins, 6-speed, 3. 55 gears, LSD, brightwhite/driftwood, 4w ABS, camper and trailer tow packages, HD transfer case, snow plow prep, group, cab lights, Isspro Boost and Pyrometer gauges mounted on A-pillar, 4" JRE exhaust, BD exhaust brake, SW fuel pressure gauge. 30,000 miles and counting as of 2/28/01.

1980 CJ-5, Modified for off-road use, bobbed fenders, 350 TBI, NP435 trans, 4. 56 gears, Dana 300, Dana 44 front, Dana 60 reverse-cut rear axle, ARB air lockers front and rear, 15/35/15 Super Swamper TSL on 10X15 steel rims, Cobra CB, Warn 9000I winch, nerf bars, 1/4" steel rock crawler bumper front and rear, jerri can/spare tire rack, custom roll cage.

My Webpage: www.homestead.com/dhatfield2/trucks3.html

 

[EMDDIESEL]

Ditto on what Doug said. anywhere from 400-800 cruising around town. And avoid running over 1200 for any length of time. The hotter the outside tempature, the hotter the EGT will get.

 

[machuri]

testing

 

[jcbrown]

300 degrees pre-turbo shutdown temperature may be too "hot" post-turbo. I have turbo shutdown monitor and my engine continue's to "run" after getting off the interstate. Pre-turbo temperature is 250 degrees.

 

[fj40charles]

I think it really depends on the outside temp. In Texas my truck EGTs will not go below 300* after I've been driving it when the outside temps are around 90*.

Charles

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2000 QC 2500 4x4 LWB ETC/DEE, Anti-Spin, 3. 54, Trailer Tow, Camper Special, DD1's, PS boost module, PS high idle kit, PS steel idler pulley, Autometer boost and EGT gauges, Westin nerf bars, Rhino Liner
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My Toy

1969 Toyota Land Cruiser FJ40
350 TBI, Turbo 400, ARB lockers front/rear, 4 wheel power disk brakes, 4. 88 ring/pinion, 3 speed transfer case, full roll cage, Warn 8274, MRT 36 bolt beadlocks with Super Swamper Boggers (16x35x15), Saginaw Power steering, custom bumpers/fenders/nerf bars/skid plate, GM tilt steering column, 6 point roll cage, RCI racing seats with 5 point harness. Loves to be pulled behind the Dodge and pass the powerjokes going up hills.

 

[JJMiller]

I'm putting in my Westach dual EGT tomorrow--one t-c pre-turbo, and the other post-turbo. I expect that the pre-turbo temps will fall very quickly after returning to idle, but that the post-turbo will take longer to cool.

This is because the pre-turbo temp is a factor only of how much fuel is burned in the cylinders, while post-turbo temps are a factor of (1) temperature of the exhaust coming into the turbo, (2) the temperature of the turbo itself, (3) heat dissipated by cooling oil, (4) under-hood air temperature.

Just because you aren't putting high temperature air into your turbo at idle doesn't mean it's instantly cool enough to shut down safely.

I'll try to get the EGT's high enough with my stock ETC to put together a meaningful post about how long it takes for the post-turbo temps to fall after the pre-turbo ones do.

--J

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John Miller

'01 2500 Quad Cab, ETC-DDX, SLT, Long Bed 4X4, Tow, Travel, 3. 54, Camper spl, Forest Green, Line-X
bed liner, silencer ring removed, guages on order

[This message has been edited by JJMiller (edited 05-17-2001). ]