|TurboFast - TurboMap|
Turbo Map can be used to plot a Turbocharged engine's air flow against various compressor flow maps, to determine what compressor wheel best suits your engine.
The points fields are used to plot the air flow at different RPM and boost conditions. It is not necessary to fill in all points fields, just one if you wish.
If a point is not visible, you will need to try a bigger map.
The following is an example of using the points fields.
RPM Boost VE Comp Effi
Point 1 7000 12 80 60
Point 2 4000 12 90 72
Point 3 2000 1 100 60
Point 1 is the maximum engine RPM.
Point 2 is the RPM where maximum boost is achieved.( Wastegate starts to control boost pressure)
Point 3 is the RPM where boost starts.
When selecting a compressor that is the best match for your engine, select a flow map where the point the maximum boost is first achieved ( Point 2 in this case) is close to the surge line, this will ensure maximum compressor efficiency through the engines maximum torque RPM.
Copyright © 2003 Ray Hall Turbocharging.