02-07-2025, 07:12 PM
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#15 (permalink)
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Base Member
Join Date: Nov 2016
Location: Toronto
Posts: 232
Drives: G37 Sport
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Quote:
Originally Posted by Spooler
Oh crap, I almost forgot. Logging EMAP is also very useful to ensure you don't have a drive pressure issue. I do use the EGT sensors to keep an eye on my Fast Intentions exhaust manifolds for a restriction. If EGT's start spiking in the higher RPM's I know that the exhaust manifolds are starting to become a restriction. You need to know the normal baseline of what the EGT's are at 7500-8000 rpm in your lower boost settings to able to determine when you start to hit a bottle neck.
Drive pressure= From the cylinder head to the turbine of the turbo.
Back Pressure = From the outlet of the turbo, out the exhaust.
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Isn't what you are talking about mostly a testing set up/tuning issue?
Once the exhaust manifold and turbo has been selected, won't the drive pressure be the same for the same engine operating conditions?
I would like to know the absolute exhaust pressure before and after my catalytic converter, but not enough to drill holes and weld bungs in my Stillen exhaust 
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