SAFE EGT TEMP'S? - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 15 (permalink) Old 07-19-2010, 07:01 PM Thread Starter
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SAFE EGT TEMP'S?

So for you guys with tuner/chips, Where do yu have your temp gauge mounted and when do you back out of it? What do you guys consider to hot to hold it? Obviously diffence from short runs (truck pull, drag race) to long uphill towing. Whats everyones rule of thumb? Thanks

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post #2 of 15 (permalink) Old 07-20-2010, 04:36 AM
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i have my gauges mounted in the a pillar with the egt on the bottom and i have had it upwards of 1400* but thats as high as i have ever let it go and it only stayed there for a second or two but that was as far as i pushed im sure it would have only kept climbing but for me 1400 is as high as ill ever let it go before i roll out of the throttle. but they say that at 1400 things can start to go wrong some will say a little more some will say less. but it also depends on the ammount of time you let it stay that high.

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post #3 of 15 (permalink) Old 07-20-2010, 12:24 PM Thread Starter
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Where did you put the actual probe though? in the bend of the mainfold at the back? Thats where i put mine and i always start to watch it heavy when it hits 1000*. I guess the four digits is what makes me nervouse....

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post #4 of 15 (permalink) Old 07-20-2010, 02:06 PM
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Mine is near the bend too. I start to watch at 1000* but don't start backing off until it crests 1200*. I have held 1000-1100* pulling heavy up hill for short periods but usually try to keep it under 1000* - she's old after all, I don't want to tempt fate.

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post #5 of 15 (permalink) Old 07-20-2010, 09:56 PM
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sorry i wasnt thinking at all at at midnight when i posted that, mine is in the pass side manifold in the center of the bank i wanted it as close to the cyliners as possible so my temps are probably different than everyone elses.

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post #6 of 15 (permalink) Old 07-21-2010, 02:30 AM
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I have mine on the drivers side toward the bend upwards. Figured I was sampling all the cylinders on that side putting it there.

I'll let my early 99 climb to 1250* before I begin to back out of it. This weekend I tickled 1400* for a mere second then got out of it. That is the warmest I have ever let her run. Most of the time while towing I run in the 800* to 1100* range.

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post #7 of 15 (permalink) Old 07-21-2010, 02:40 AM
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Safe SUSTAINED pre-turbo EGT's should be limited to less than 1250 degrees.

You can go higher than 1250 in short bursts such as drag racing or sled pulling. But don't tow a trailer up a mountain pass at over 1250 degrees, or you'll run into trouble.

I've personally seen 1500 degrees with an exhaust leak and a broken wastegate actuator. Fixed those problems in a hurry.
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post #8 of 15 (permalink) Old 07-21-2010, 06:44 AM
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Quote:
Originally Posted by Pocket View Post
Safe SUSTAINED pre-turbo EGT's should be limited to less than 1250 degrees.

You can go higher than 1250 in short bursts such as drag racing or sled pulling. But don't tow a trailer up a mountain pass at over 1250 degrees, or you'll run into trouble.

I've personally seen 1500 degrees with an exhaust leak and a broken wastegate actuator. Fixed those problems in a hurry.
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post #9 of 15 (permalink) Old 07-21-2010, 05:39 PM Thread Starter
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Thanks guys. Makes me feel a lot better. I was alwys wondering about where to let out of it. Do you guys notice on the temp when you air filter gets dirty. Mines seemed a little hotter lately. Thinking its about due. In the tow setting Im probably in the 800-1100 area as well. high setting jumps it up in a hurry though if not carefull. Thinking its time to straight pipe it. and try to keep her cool.

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post #10 of 15 (permalink) Old 07-21-2010, 10:55 PM
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the air fuel ratio has a lot to do with it, of course in the "high mode" its getting more fuel and more air and like a oxy torch but in engine cylinder form, depending on the mix it will be hotter or cooler. how hot the temp outside is also matters cold air is more dense than hot air and effects egt. so long story short i dirty airfilter doesnt move air as efficently and could have that effect on the egt.

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