Exhaust backpressure data
#2
#3
Out of all the data I've seen, 53 PSI absolute backpressure is about the limit of the sensor. With that reading, you need to do as The Brad suggests and subtract the air pressure of your altitude (in PSI) to get your gauge backpressure. It sounds like you are about 3 PSI from maxing the sensor (and the engine) out. I wouldn't want to exceed 40 PSI gauge backpressure on valve springs with a lot of miles. To that end, I set my wastegate to let go right at that 53 PSI absolute.
Another question is... what does your MAP say at that backpressure? Many stock turbos give up about 27 - 30 PSI boost at 39 - 40 PSI gauge backpressure, where my 38R is about even all the way up the dial.
Another question is... what does your MAP say at that backpressure? Many stock turbos give up about 27 - 30 PSI boost at 39 - 40 PSI gauge backpressure, where my 38R is about even all the way up the dial.
#4
Join Date: Mar 2014
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Ok I will get some more info and report back I don't think anything is wrong just trying to understand what I am looking at when I see these values so if something is wrong I can spot it and know where to look. Using DashCommand so there won't be any IPR % or Fuel pulse which sucks because those are some very important numbers.
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SRBF150
1999 - 2003 7.3L Power Stroke Diesel
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08-08-2015 06:56 AM