How hot is to HOT!!

[bbutler]

I installed my EGT prob in the exhaust manifold ( pre turbo ) and it seems to be working just fine there. I've seen temp's as high as 1400F pulling a long hill in 115F degree heat. The reason I installed the gauge was for turbo cool down, but I find it's just as important to watch the top end as well. So how hot is to hot?

 

[Sky]

I dont think you want to go above 1400, Most people like to stay below 1350 (preturbo).



Mike

 

[Texas Diesel]

http://www.egauges.com/vdo_mult.asp?Type=Pyrometer&Series=EVA

 

[ProBaja Motorsports]

Is there a recommended cool down time for the turbo before shutting off the motor, after running with a heavy load?

 

[JHerrlich]

I would try and keep it below 1200°. Remember that most aluminum alloys melt at around 1220°. I wouldn't want to risk it.

 

[KatDiesel]

Originally posted by Probaja Motorsports

Is there a recommended cool down time for the turbo before shutting off the motor, after running with a heavy load?

In your owners manual it lists recommended times.



This is from the Ram Service Manual

Stop & Go, Load - Empty, Turbocharger temp - Cool, Idle Time... Less than 1 min.

Stop & Go, Load - Medium, Turbocharger temp - Warm, Idle Time - 1 min

Highway Spds. , Load - Medium, Turbocharger temp - Warm, Idle Time - 2 min.

City Traffic, Load - Max GCWR, Turbocharger temp - Warm, Idle Time - 3 min

Highway Spds. , Load - Max GCWR, Turbocharger temp - Warm, Idle Time - 4 min.

Uphill Grade, Load - Max GCWR, Turbocharger temp - Hot!!, Idle Time - 5 min.



Best way tho is to get a EGT gauge, 300° preturbo is when I shut down. Post turbo is better for "shutdown" purposes. I don't remember what value you shut down on post turbo.

 

[KatDiesel]

I wouldn't wanna sustain 1400° for all that long on a long hard pull. But quick bursts of power I have seen 1500° and no problems whatso ever engine related.



The magic number ranges from 1250° to 1350° depending on who you talk to.

 

[TomGolden]

I personally have never gotten over 1200 on mine, just a bit paranoid I guess. A few months back I was at a truck pull where one of our TDR boys pulled his first pull, and after he left the track, someone asked about his EGTs. I believe he has the SPA gauges. Anyway, he did say he saw it go as high as 1700 for a brief moment. Nothing liquid came running out the tail pipe, but it was for only seconds at that high temp.



Tom

 

[roadranger]

On a recent road trip while on I-80 in Utah and Nevada (HOT out there,running A/C), I'd pull into a Flying J to fuel up and leave the Cummins idling to cool off- problem was, I'd be done fueling up before the temp would get below 400* (pre)!



After this, on the one stop I wanted to check the oil level, I turned off the A/C approaching the off ramp, and by the time I'd eased down the road and idled thru Flying J's lot up to the pumps, it got down to 300*. Works for me!

 

[Chad Sheets]

I try to never shut down unless I am at 300 post. Shut her down hot, and all that oil (oil cooled turbo) sits there and cooks. Real fast way to kill a turbo before its time, not to mention break the oil down prematurely as well.