William Mapstone
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When properely tuned, what kind of mile per gallon can I expect from my 68 spitfire. Thanks!
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Spitfire fuel economy for 68 spitfire
- Thread starter William Mapstone
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I would expect anywhere from mid-20s to low-30s.
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William Mapstone
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thanks andrew.
Would switching to a newer designed carb increase the fuel economy? With gas prices rising, I wanted to make the triumph my everyday driver during the spring,summer,fall, and was hoping to get closer to 40 mpg. Considering the low weight and low hp of the triumph, I figured getting close to 40 mpg should be possible?
Would switching to a newer designed carb increase the fuel economy? With gas prices rising, I wanted to make the triumph my everyday driver during the spring,summer,fall, and was hoping to get closer to 40 mpg. Considering the low weight and low hp of the triumph, I figured getting close to 40 mpg should be possible?
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At the expense of power, it's possible that a single Stromberg setup from a later Spitfire might boost the economy a bit. What might help more would be more expensive: going with a lower numerical differential (3.89:1 from later US-spec. Spitfire or even 3.63:1 UK-spec diff from a 1500) would cut the revs and likely boost economy. Still more expensive would be addition of an overdrive gearbox. But I seem to recall that some of the later (and much heavier) Spitfires were easily capable of mid-30s or more when OD equipped.
Or don't ever drive much over 40 mph (but that's not a realistic option unless they revive the Mobil Economy Runs)! /bcforum/images/%%GRAEMLIN_URL%%/driving.gif
Oh, as an additional data point: my '62 Herald 1200 sedan, probably about 100 lb. or so heavier than your Spitfire and with a smaller and less powerful engine (single carb.), will easily do 30-35 mpg depending on conditions.
Or don't ever drive much over 40 mph (but that's not a realistic option unless they revive the Mobil Economy Runs)! /bcforum/images/%%GRAEMLIN_URL%%/driving.gif
Oh, as an additional data point: my '62 Herald 1200 sedan, probably about 100 lb. or so heavier than your Spitfire and with a smaller and less powerful engine (single carb.), will easily do 30-35 mpg depending on conditions.
Geo Hahn
Yoda
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Andrew Mace said:
This past weekend we took our first long (1000 mile) road trip since installing an OD in the TR4. Outbound was 2-lane roads at 55-60 mph, coming home was 75 mph interstate. Average for the trip 34.6 mpg with the slower outbound trip delivering just under 40 mpg.
Wow at this rate I'll be paid back for that overdrive unit in just... 170,000 miles.
Still, I have to declare it is worth it.
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But don't forget to factor in the cost of at least one set of rings, bearings and gaskets that you'll NOT have to replace now that you're keeping the revs down.... /bcforum/images/%%GRAEMLIN_URL%%/grin.gifGeo Hahn said: