Help me decipher my AE results on manifold/exhaust pressures. Don't think their good - Ford Powerstroke Diesel Forum
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post #1 of 3 Old 10-21-2013, 02:39 PM Thread Starter
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Help me decipher my AE results on manifold/exhaust pressures. Don't think their good

So I have ran through multiple tests on my pickup using my new to me AE and the one that is throwing me for a loop on interpretation is the trifecta of Manifold absolute pressure/Exhaust back pressure and Barometric pressure volts especially in relation to my altitude here in Denver. At idle of 683 rpm my Manifold absolute prissure is 12.10 and Exhaust back pressure is 12.94 with barometric volts of 3.74.

At 1823 rpm
MAP is 15.50
EBP is 18.41
BPV is 3.75

At 2952 rpm (not floored but heavy acceleration up a hill)
MAP is 29.90
EBP is 43.46
BPV is 3.73

A second blip on the pedal at 2976 gave me
MAP is 30.40
EBP is 44.33
BPV is 3.74

Is this too much of a spread between map and ebp?
I am at 5280 feet and have no muffler/CAT and just straight pipes. I am having a hard time figuring these. I took a recording of this session and don't know if I need to post it or if the above numbers are enough.
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post #2 of 3 Old 10-22-2013, 11:50 AM
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mind you, if im not mistaking, MAP see's 14.7 value, at idle/not, doingthe math, your boost is right. And also, i'm thinking, the backpressure should be 1-1 as well...

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #3 of 3 Old 10-29-2013, 04:48 PM
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Should be close to 1-1 but wont be exactly

99.5 F-350 SRW Short Bed, Ex Cab.
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