Quote:
Originally Posted by Dimis
... Is it just me or does it lack that deep rumble and is more raspy in sound?
|
It does Anth, but that is because of the variable cam timing. The engine at idle actually spreads the lobe separation angle for emissions, idle quality and vacuum. By reprogramming the ECU to tighten lobe separation angle at idle, the traditional rumpity rump sort of idle returns along with increased emissions and reduced idle vacuum.
The programable, variable nature of the cam to crank phasing brings a lot of interesting capabilities to the n/a version of the motor including the lack of a visible PCV system. Ford has been able too achieve the same PCV function on the Coyote by adjusting cam to crank phasing.
Ed