Quote:
Originally Posted by El Sid
It really doesn't have anything to do with the torque curve.
The engine is effectively an air pump - it pumps air through the cylinders and the fuel is metered by computer to be stokiometric.
The more air pumped, the more fuel is metered.
More air pumped at 4000 than at 2000.
Nothing to do with the torque curve.
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Your torque curve DOES matter for fuel economy. You get your lowest fuel consumption at the rpm of your highest torque. You should accelerate in that rpm band. I wish I could find a specific fuel consumption graph.
Also, I just quickly scanned this thread, but I didn't see it mentioned. As long as your AFR's stay at schoic, this works. Once you start getting into the enriched areas, this doesn't work.
I have found that I get best acceleration economy boosting under 5 psi, 30-40% throttle, keeping the motor between 2500-4000 rpm.