Mitch,

The gas engine may well be more efficient at full
throttle, but that efficiency is offset to some degree
by compression stroke power loss which increases as
intake vacuum decreases.   I am theorizing that the
diesel efficiency curve is steeper than the gasser
curve.

Bruce

--- Mitch Haley <[EMAIL PROTECTED]> wrote:

> B Dike wrote:
> > On the other hand, a
> > gasser has much less compression, and compression
> > power loss is proportional with throttle setting
> due
> > to their intake air butterfly. 
> 
> Backwards. Sucking a vacuum in the intake causes
> loss in efficiency. 
> Your gasser will see maximum horsepower-hour/btu of
> fuel when running full
> throttle at peak torque rpm. Gearing up and using
> more throttle opening
> when requiring low power increases mpg in a gas
> engine more than it does
> in a diesel.
> 
> The best reason to drive a diesel like you stole it
> is to keep it clean
> of unburned fuel residues.
> 
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Bruce
82 300CD 333kmi 'His'
85 300CD 234kmi 'Hers'
75 240D 185kmi 'Theirs' (Back in Commission)
77 240D 199kmi 'The Brown Car'

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