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Old 05-29-2019, 12:10 PM   #28 (permalink)
Shaneajanderson
Redneck Ecomodder
 
Join Date: Feb 2019
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Quote:
Originally Posted by redpoint5 View Post
The alternator is very inefficient, and ditching it has shown gains of around 5% depending on how efficient the vehicle is in the first place and the electrical demands. That requires more battery capacity and a means of charging from the grid.

I think there are gains to be had by replacing the lead acid battery with another chemistry or perhaps a supercap, but they would be very small and likely not measurable. One of my projects is to measure the difference in efficiency between a lead acid and lithium ion battery someday by discharging it some measured amount, and then measuring how much energy is required to charge it back to "full".
Ok. This project will probably never get done on my car then. The old Metro is pretty fuel efficient as is, and a new O2 sensor will do far more than the maybe 1% you're predicting here.

Obviously my reading comprehension needs some help.
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