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Discussion Starter · #1 ·
A maybe fix for spider gremlins. In My opinion the battery is used as a filter capacitor for the noisy output of the alternator. A good lead acid battery will have an internal DC resistance of probably less than one ohm. As the battery begins to deteriorate the affective series resistance ESR probably rises to the point where the capacitor filtering effect of the battery is not capable of suppressing the noise from the alternator. The computer then can do anything. I have tried a lithium phosphate battery in my spider, but these batteries generally have a built in regulator in series with the battery pack and do not offer the filter action (higher internal resistance) that a low ESR lead acid battery would, The lithium battery I tried did not work Computer went berserk. Use a AGM battery and check it often. George Merrill
 

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For alternator noise -- install at battery location: https://www.amazon.com/MSD-8830-Red-Noise-Capacitor/dp/B00029JMJ4

For my 2014 RT-S I was so pleased with one Shorai LFX36L3-BS12 I added a second one (in the frunk). I also replaced the fuel level gauge with an analog voltmeter but it was so boring I'm replacing it with an analog clock.
 

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Discussion Starter · #3 ·
For alternator noise -- install at battery location: https://www.amazon.com/MSD-8830-Red-Noise-Capacitor/dp/B00029JMJ4

For my 2014 RT-S I was so pleased with one Shorai LFX36L3-BS12 I added a second one (in the frunk). I also replaced the fuel level gauge with an analog voltmeter but it was so boring I'm replacing it with an analog clock.
Hi you can also use a 1.0 Farad Car Audio Power Capacitor ebay for about $35.00 This may allow the use of a lithium battery.
 
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