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Old 06-10-2020, 08:18 PM   #540 (permalink)
Ecky
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Join Date: Dec 2011
Location: New Zealand
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ND Miata - '15 Mazda MX-5 Special Package
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Quote:
Originally Posted by California98Civic View Post
$20 is a good price. If your upper limit is about 81 mpg, well then, it seems with a few more aero mods and your careful tuning, you should be able to get a staged 70 mpg single run average for sure.... a few miles in good conditions should be doable with minimal hypermiling (once you get everything dialed in). A coveted "70 mpg Club" sticker picture awaits you. hahaha...

I certainly hope so. It looks like at 65mph, 60% of the gasoline burned is just spinning the engine and the remaining 40% pushes the car down the road. Engine mods seem like the low hanging fruit here.

70mpg would require that 0.13 gallons per hour propel the car and 0.8 gallons per hour spin the engine, if I can't get the engine losses down or do pretty extreme EoC.

Edit: maybe taller tires, more EoC, and lower speeds, but I'll need all of it. This was a car that was delivering 100mpg for hundreds of miles prior to the swap, so it's already running very "lean". Lower speeds will help more because engine RPM is low than because of reduced drag.
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