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Old 03-26-2006, 11:39 PM   #1
sandwi54
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Default EGT difference between header and uppipe

I used the TARI software to log my data and I saw a max EGT of 1320 F. I know that temperature was taken at the uppipe and not the header. Does anyone know what the typical EGT difference between the header and the uppipe is?
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Old 03-26-2006, 11:52 PM   #2
Rail
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The actual temperature difference isn't the issue(if it were, it'd be easy to adjust the figures in your head), it's the rate of change. The temperature changes much more quickly closer to the engine, the delay at the uppipe pretty much defeats the purpose of taking EGT readings.
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Old 03-27-2006, 02:24 AM   #3
N1mxer
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damn thats not what i like to hear... i just spent a bunch of time taking off my headers and welded in a bung and put my egt probe at the collector before the up pipe , i did notice the gauge seems slow for me.. there the omori gauges and my first of there kind , who knows
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Old 03-27-2006, 09:56 AM   #4
Jon [in CT]
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Quote:
Originally Posted by Rail
The actual temperature difference isn't the issue(if it were, it'd be easy to adjust the figures in your head), it's the rate of change. The temperature changes much more quickly closer to the engine, the delay at the uppipe pretty much defeats the purpose of taking EGT readings.
That's nonsense. Pilots routinely use EGT measured at the turbo's turbine inlet to adjust their fuel trim. It's highly correlated with EGT measured at an exhaust port.
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Old 03-27-2006, 10:06 AM   #5
subieworx
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I see a difference of about 150-200 between the two during WOT 4th pulls. At idle though they are normally identical.
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