Intake pressure drops, post em if ya got em
09-13-2013, 09:27 AM
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Intake pressure drops, post em if ya got em I'm interested to see what sort of intake pressure drops at WOT other people are seeing, and if it would be worth upgrading my current set up. Without further ado:
Key on engine off pressure, from MAP sensor: 96 kPa
MAP at WOT, 5000+ rpm: 92-93 kPa
Pressure drop: 3-4 kPa
Car: 2000 Holden, stock internal LS1 with headers/high flow cats/exhaust/tune
Intake setup: LS6 manifold/TB, 85mm descreened maf, 90mm intake pipe, stock side airbox with enlarged inlets/100mm outlet.
I'm sure some of the drop is due to the 75mm manifold neck and TB, but I also think the 90 degree bend in the Holden intake is a restriction and am considering an over the radiator intake. What sort of pressure drop do you guys see with straight shot intakes? If there's only 1kPa to gain then it's probably not worth it (1 kPa = ~1% power).
HPT log of a 2nd gear run attached, with MAP scale expanded.
Key on engine off pressure, from MAP sensor: 96 kPa
MAP at WOT, 5000+ rpm: 92-93 kPa
Pressure drop: 3-4 kPa
Car: 2000 Holden, stock internal LS1 with headers/high flow cats/exhaust/tune
Intake setup: LS6 manifold/TB, 85mm descreened maf, 90mm intake pipe, stock side airbox with enlarged inlets/100mm outlet.
I'm sure some of the drop is due to the 75mm manifold neck and TB, but I also think the 90 degree bend in the Holden intake is a restriction and am considering an over the radiator intake. What sort of pressure drop do you guys see with straight shot intakes? If there's only 1kPa to gain then it's probably not worth it (1 kPa = ~1% power).
HPT log of a 2nd gear run attached, with MAP scale expanded.
