is it safe??
Fleet Mechanic
Joined: Jun 2019
Posts: 1,899
Likes: 236
From: Southern California
Not exactly because it's more complicated than that, but I've not seen any good data for a stock GTP38 turbo. However I have seen data for upgraded turbos and I'll pull together what data I've got and post it later, or maybe I'll wait until I finish the post I mention below!
Here's a "mouthful" from a post I'm preparing on turbos. I've come up with the term AFHP=Air Flow HP to define the "turbine shaft HP" that needs to be applied to the turbine wheel by the hot exhaust gas to power the compressor wheel to pull a given VAF=Volume Air Flow ft^3/min=cfm through the restriction of an air filter element, and then pressurize this ingested VAF, and push it through the restriction of an intercooler, and into the intake manifold to produce a given MAP=Manifold Air Pressure psi, which corresponds to a given BP=Boost Pressure psi, and then through the intake valves with a given VE=Volumetric Efficiency, and into the cylinders to produce a given CAP=Cylinder Air Pressure psi, where VE=(CAP)/(MAP)?
So would anyone like to offer up an estimate of the AFHP that's required to develop a 28 psi boost at sea level?
Here's a "mouthful" from a post I'm preparing on turbos. I've come up with the term AFHP=Air Flow HP to define the "turbine shaft HP" that needs to be applied to the turbine wheel by the hot exhaust gas to power the compressor wheel to pull a given VAF=Volume Air Flow ft^3/min=cfm through the restriction of an air filter element, and then pressurize this ingested VAF, and push it through the restriction of an intercooler, and into the intake manifold to produce a given MAP=Manifold Air Pressure psi, which corresponds to a given BP=Boost Pressure psi, and then through the intake valves with a given VE=Volumetric Efficiency, and into the cylinders to produce a given CAP=Cylinder Air Pressure psi, where VE=(CAP)/(MAP)?
So would anyone like to offer up an estimate of the AFHP that's required to develop a 28 psi boost at sea level?
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