Quote:
Originally Posted by Enki
Lithium Ion supercaps are out now. They don't go past 270 farad ratings, and have a voltage range of 2.2-3.8 volts but charge in a minute at most. They are essentially fast charge batteries, and in larger sizes, will be a game changer.
Lithium Ion Super Capacitors - Taiyo Yuden | Mouser
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I can't wait for these things to get bigger. |
I couldn't find any more info on the tech besides the link you provided. No info on the allowable charge/discharge rates.
Quote:
Originally Posted by California98Civic
It would take more of a swap than that, I think. The Hondas have an "Electric Load Detector" that contributes to the load-dependent voltage changes. The wiring harness also needs lines for the ECU to read the voltage at the alt. Your best mod might be an alt kill switch, greater battery capacity, and grid charging. You could run without the alt for all your shorter trips. MetroMPG saw a 10% FE increase when he tested that setup. It's what I run too. My alt is off most of the time.
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Although my car is a Honda, I don't believe the TSX has an ELD. The voltage remains constant on my car. I'd like to run LiFePO4 only, and do an alt kill switch, but I need to find out how best to accomplish this without destroying the alternator. I'll also need to figure out how to disable the alternator to determine my average running amps.
Quote:
Originally Posted by orange4boy
So where is the info on the $40 lithium battery you mentioned? Looking for one for my bike. I searched back. Am I blind?
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You talkin' to me?
Here is the battery I'm running. Shipping drives the cost way up.
If you're handy, I'd probably go with the ones
Enki linked. They are a little more expensive (you have to buy 4), but have a 10Ah capacity compared to 4.2.
Quote:
Originally Posted by ECONORAM
So then I noticed the voltage drop when the engine tried to lower to 450 rpm and started speculating that the PCM was watching the voltage to limit the idle rpm. It's a .2 gal/hr difference at idle...
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I think you've figured it out. The alternator is no longer spinning fast enough to output the voltage the ECM wants to see. It increases the alternator speed by increasing engine speed at idle.
As Enki says, you need to install a smaller diameter alternator pulley to increase the speed. I'm sure you are wasting more fuel by running a higher idle RPM than the under-driven alternator is saving you.