have everything installed, need help getting my voltage Solid

[adjetta 10+ year member]

View attachment 26549146

green = ground

red = power

copper = connection

red rectangle = fuse...lol

above is how everything is laid out, I installed a 270 amp mechman alt, about 40' of stinger 0/1 pro series with copper lugs, 1 xs power d3100, a Sears Diehard platinum advanced Agm (oddessey 65ah, 930 cca).

I start the car and it reads about 14.0-13.9, then about 3 miles into my commute it stays around 13.7-13.8, but after the alt gets good and hot its dips and hits about 13.3-13.4, havent seen it go lower, but all of this is under a minimal load, it holds voltage under stress, its just low voltage...

im an amature, what can i do to solidify

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[adjetta 10+ year member]

i was wondering about replacing the diehard because of it being dissimilar to the xs power, could i run any xs power d series and improve my voltage and battery life span?

 

[Dmac1991]

Is the alt still PCM regulated?

If so, that would explain why it charges so low hot.

Changing the batteries won't change a thing because you aren't in the battery power yet. Anything above your batteries resting voltage is alt power so until you drop in that range (12.8-13.2), you aren't even fully utilizing your battery bank yet