pyrometer - Ford Powerstroke Diesel Forum
 
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post #1 of 6 Old 12-26-2009, 01:19 AM Thread Starter
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pyrometer

Hi i just got my truck going from a ground up rebuild. I fitted a pyrometer and when I was towing up a hill the temp went up to 1250 f before i backed off and if I let it, it would go passed it and once had it to 1400 f the probe is in between the last two ports on the left hand side and on cruise it sat on 1000 f and at idle 350 f. the mods are h2e turbo stage 2 injectors 6.0lt intercooler but not running a chip at the moment as the motor is new. could it be the gauge or is just running hot. Des

'96 F350 crew cab short box 4x4
stage II injectors
4" exhaust system
H2E turbo
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post #2 of 6 Old 12-26-2009, 07:32 PM
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Hows your boost? If your getting low boost and high EGTs I would suspect a leak in the intake / IC. Idle temp is OK. 1250 is about the limit sustained (for me). I'm guessing you pyro probe is in the exhaust manifold. My WAG.

Pete in San Ramon

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post #3 of 6 Old 12-26-2009, 10:15 PM Thread Starter
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Yes the probe is in the exhaust manifold. The boost will get to 30 psi when i pushed it up a hill, cruising up a hill 15 psi and 1250 f.
Thanks Des

'96 F350 crew cab short box 4x4
stage II injectors
4" exhaust system
H2E turbo
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post #4 of 6 Old 12-26-2009, 10:27 PM
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How much are you towing, and what grade? Sounds normal if its a good load... and 1250 can be run all day long.

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post #5 of 6 Old 12-26-2009, 11:40 PM Thread Starter
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I'm towing 5,500 pounds and don't know the grade of the hill but i can get 1250 on flat ground went overtaking.

'96 F350 crew cab short box 4x4
stage II injectors
4" exhaust system
H2E turbo
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post #6 of 6 Old 12-27-2009, 12:09 AM
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Stage 2's are typically 160CC injectors with 100% nozzles.

96 PSD's came with 90CC injectors.

So, you have almost twice as much fuel, and it's injecting twice as fast.

And since you're runnin without a chip, when the PCM asks for a certain amount of Pulse Width, it's gettin more than it wants for that RPM, level of boost, etc.

I.E. 2.5 seconds of PW with a 90CC stick is XX amount of fuel.

I.E. 2.5 seconds of PW with a 160/100% is XXX amount of fuel.

Make sense? Once you get some quality tunes I expect you'll run cooler
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