Quote:
Originally Posted by Ecky
VTEC is essentially having two cam profiles optimized for different rev ranges, and usually the switchover is 4-5,000RPM. It wouldn't surprise me if most VTEC engines had better fuel economy (all else being equal) than their non-VTEC counterparts due to the lower-rev-range cam profile being tuned for lower revs, rather than aiming for the middle as is the case with a lot of Honda's non-VTEC designs.
As firehawk618 said, most VTEC engines (aside from the ones in the VX/HX models) are geared much shorter though, which probably accounts for most of the mileage differences.
|
I read a thread somewhere, saying that the best thing you can do for your MPG is to keep the RPM below 3000, and better yet below 2000, the latter of which aint so easy. But I can pretty easily stay below 3000, except in rare cases when I have 100 feet to accelerate onto a 65 MPH highway, or face a concrete barrier with no pullover lane. ( Yes, we have one like that near here - thanks Denver! )
Where did that little chart you posted come from?! That would be phenomenal!
