Engine/Transmission (1994 - 1998) EGT / post & pre-turbo in relation to boost.

[Jeff]

Hi guys.

I was running a pretty sizable load across the NY/PA/OH turnpike today and have a question. I have my probe in after the turbo. (long story but my diesel mechanic said that he didn't want to drill into manifold) anyway... I was pulling a pretty good hill at 60 mph for about 1 mile (1 minute) I was at 600 degrees w/ 30 lbs. of boost. (4th gear / not lugging) what do you think my actual temp would have shown if my probe was pre-turbo? I usually add 300 degrees to compensate for my probe, but someone else told me that if you are really making lots of boost, you should add WAY more than that? What do you think?

My truck is pretty mild compared to most... see signature.



FWIW - My truck broke 150K miles today and I love it as much now as when it was brand new. Has any truck company found an engine as simple, fuel efficient, powerful and sounds as good as our mighty 12 valves... . I don't think so.



Thanks! Jeff in Ohio

 

[NIsaacs]

Jeff,

Based on you pulling 30# of boost for 1 minute, I would think you would be closer to 900 degrees post turbo. How far is your probe down stream from the turbo? Should be about 2" max. It sounds like your gauge is bad. Check all your wire connections, most pyros are very touchy about this.



"NICK"



"IF IT AIN'T CUMMINS POWERED, IT AIN'T A TRUCK"

 

[Turbo Thom]

Nick sounds pretty close. I can run 600 empty at 5 lbs of boost. If I get to 30 on the boost, I'm up around 1200 or more. I'm at just 308 on the HP scales. Course I did what the mech didn't like. Mines in the manifold. I think you're little hot when the truth gets out.



. . Preston. .