flow vs pressure (porting vs boost)
11-30-16, 11:38 AM
#26
Banned. I got OWNED!!!
eMAP:MAP Ratio is always over 1:1 unless the exhaust is SUCKING... A really good system would be like 1.2:1. Anything over 1.5:1 needs exhaust/turbine housing modification/optimization.
11-30-16, 01:50 PM
#27
I probably should have specified I'm referring to manifold gauge pressure, not absolute. Once turbine back pressure (gauge), is higher than inlet manifold pressure (gauge) there is a lot more intake charge dilution with hot exhaust gas. The more overlap the engine has, the more dilution takes place.
12-19-16, 09:31 AM
#28
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Current setup stays VERY close to 1:1 all the way to the 26psi range
JzG is right on the money for everything that I have experienced as well