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Correcting your AFR

EFI Tuning Fundamentals

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On the dyne, how do you maintain the RPM say at 2000 yet increase your MAP pressure. I expect if you open the throttle the RPM would increase?

It's probably a stupid question...

He is using a load-controlled dyno, where you can specify the engine speed (or wheel speed), and the dyno will vary the load to hold the speed steady. This type of dyno is required to do steady-state tuning, and really speeds the process.

Excellent! Thank you