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Engine Specific Info and Questions => IDI Engine => Topic started by: lyeinyoureye on November 27, 2007, 11:56:11 am
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Does anyone know how much these cars smoked WOT (er, injector) from the factory? Going off of this BSFC map, the only one I've found, it seems that after a certain point, especially at part load, increases in fueling lead to marginal increases in power because efficiency drops at nearly the same rate. For example, going from ~6.5bar to ~8bar at 2500rpm increases torque to ~123%, but it decreases efficiency to ~83%, so we need to burn ~40% more fuel just to get ~20% more power at that engine speed.
(http://img.photobucket.com/albums/1003/thaticktockman/VWBSFCSTOCKeff.jpg)
Not only that, but even after cutting fuel peak power is still about the same mas or menos. So, short of a dyno, does anyone know how to figure where fuel injected versus smoke is according to the BSFC map?