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911st 911st is offline
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Join Date: Jan 2004
Location: Sacramento
Posts: 7,269
I do not know of any mfg using a blow through metering system. However, Protomotove has been quite successful doing so and I think makes up to 475hp with such systems.

The 944-Turbo is a pull through.

With a blow through the BOV can be to atmosphere. On a suck through it should loop around the turbo compressor.

I suspect minimizing any restriction after the turbine or before the compressor wheel possible improves a turbos efficiency but can not say that for sure.

On a pull through there is a lot of intake volume (including the intercooler) that might dampen the AFM's responsiveness v having it just in front of the throttle body.

The AFM's were not designed to be pressurized so some efforts may be required to hold them together.

Not sure any of this helps.

I think I vote for the simplicity and ability of the AFM to more quickly sense changes in air flow of a blow through.
Old 02-03-2010, 01:47 PM
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