I did a controlled mileage test on Saturday with a 1 gallon gas can in
the trunk of the Spit.
I ran the car out opf gas, put in 1 gallon, ran the car out of gas, put
in 1 gallon etc.
Stock 1500 OD, 3.89 rear (just rebuilt), water choke 150cd Stromberg,
stock intake,
exhaust w/cat and air filter. The car has only run 500 miles over the
last 8 months due to
exp/tensive winter repairs after PO left in garage for over 8 years.
1st gallon - (by mistake) premium unleaded - city - 25.8 ( I won't pay
extra for lousy mpg again).
2nd gallon - regular unleaded - city - 27.9
Didn't want to run out of gas on the rural 2-lane highways - went to 2
gallons.
This trip was 85% rural 2-lane highways (some quite curcy ;-)), 15% city
- moderate OD use,
heavy foot (what's new)
3rd (2)gallons - regular unleaded - 31.6
This trip was 75% rural 2-lane highways, 25% city - liberal OD use at
sustained speeds over
45 mph, somewhat lighter (not much, not my nature - following speed
limit junkies) foot.
4th (2)gallons - regular unleaded - 32.1
Based on these findings, I expect to average 27 mpg city, 34 strictly
highway mpg.
Not bad, considering the fun I'm having with my foot in the carb of this
thing. This day I drove
200 miles in 60+ degrees and was the kind of day that lead me to buy
another Spitfire in the
first place.
Mike
79 Spit
>On March 6th, Bob Sykes wrote:
>wrt Spit Gas Mileage. ('78 Spit)
>I've been tracking my MPG with a computer program for the last 7 years.
>ISTR my mileage being a little better when the Spit was new but I have
>no data from then, just rose coloured spectacles ;-)
>Anyway, the data summary:
>
>Non OD with ZS 150 "autochoke" carb - 23 city - 30 highway
>Non OD with ZS 150 "manual choke" carb - 25 city - 33 highway
>(this is a stock carb for a MKIV 1300 motor maybe jetted differently?)
>The car with OD does about the same in the city but gets 35-37 highway
>with liberal use of the OD.
>Same cars with single Weber 45DCOE - 15 city - 18 highway
>(This carb demands a more spirited approach to driving =:-O)
>I'll have to wait for a couple of weeks to see how the dual HS4s do
>
>
>--
>Bob Sykes - - - __,@_\____ s1500@worldnet.att.net
>'78 Spitfires - -- }-0-----0-> s1500@aol.com
>
>
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