Quote:
Originally Posted by serialk11r
Uh that doesn't change anything. I was assuming brake all along.
It is a derived figure from torque and displacement. Because displacement and torque are typically given directly it's better to just use that instead of some contrived pressure figure that doesn't actually mean anything.
Anyways, you were talking about reduced friction. Again, per unit displacement. The pistons have a smaller circumference but there's also less displacement. The stroke is smaller on the 2GR which is more friction, but the bore is much larger so the piston rings have less friction per unit displacement.
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Think of BMEP as being used for development (the 'why') and the torque as being for the end-user (the 'what'). It gives a better example of what must be done (increase pressure and reduce friction/thermal losses) to get the torque.
The friction was a simple example. Would we be comparing the circumference and piston area to the stroke then? (2GR is 94mm X 83mm)