Stock 948 with 1.25 SUs and 3.90 rear got 50 MPG easy, Louisville to Melbourne
FL through the mountains (till GA). Lots of engines now shut off cylinders to
get hwy MPG. Otto/Rankine/Carnot/Sterling cycles being what they are, usually
smaller is more efficient.
My "breathed on" 1275 gets about 8 MPG at best ;).
Ron Soave
--- On Thu, 3/12/09, Glen Byrns <grbyrns@ucdavis.edu> wrote:
> From: Glen Byrns <grbyrns@ucdavis.edu>
> Subject: Re: [Spridgets] Mileage
> To: spridgets@autox.team.net
> Date: Thursday, March 12, 2009, 8:24 PM
> My best truck-drafting leg out of LotO back to CA was 44mpg.
> With a TURBO!!
> 5-sp/3.9ratio 1275. (A well tuned homebrew fuel injection
> system helped
> more than a bit and shows what is possible.) It also
> helped power over the
> Rockies and the Sierra, from sea level, twice each without
> any re-tuning.
> The engines have good potential hiding within. The worst
> leg was 22mpg
> right after leaving LotO and heading right into a huge
> windstorm for an
> entire tankful until I turned west. No truck to hide
> behind.
>
> Glen
>
> > >
> > A well tuned breathed on 1275/5 speed and cruise
> control will get you 42
> > mpg on the highway.
> > That's what I was getting to and fro last
> summer's Missouri trip.
> >
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