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Originally Posted by California98Civic
How low do you think voltage would have to go to have such an effect? Across the full 30-40 miles I would drive, I might expect battery voltage to dip from 12.5v - 12.0v or maybe 11.8v. Still, my alt delete seems associated
with a 3+ mpg improvement. Could fuel rail pressure really rival that impact?
If I did something to recharge the battery in between runs, that would deal with the problem entirely, correct? How much recharging to you think? What voltage level should I look to maintain?
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I'm really not sure on the answers to any of the questions because of all the variables from car to car. However despite the fluctuations you see on your volt meter,I still think the alternator would do a better job at keeping the average load even across the runs than you could achieve trying to set the charge level manually. I say that because surface charge (or discharge)can make it impossible for you to set the same state of charge level based on voltage readings. That is why they recommend to let the battery sit for at least 12 hours before a SOC voltage measurement as to allow time for the voltage to stabilize.(after charging or discharging)
Barna