I have an odyssey light weight battery and my voltage was around 14.0 (i have an apexi rsm) all the time.. but ive noticed that its a lot lower now.. near 13.5-13.7 all the time... I am going to change my grounds, because i have a feeling theyre kinda lousy... but other than that.. what can i do?!?! is htis a problem?

 

i constantly read 13.4 - 12.8ish (reading off my escort x50)

but that doesn't sound too bad for me. i don't think that .2 drop in volts will make a difference esp. since you were already reading kinda high.

 

my apexi says 12.8 to 13.2v
actual charging volts for a prelude alt should be 13.5 to 14v
so you're ok

 

13.5 is normal, i would expect to see it dip lower with accessories on. if you feel its to low, check grounds.. if there is a alt problem it will make a high wining noise as the rectifiers fail. ususally the bat light will kick on if there is even a slight problem in the charging circuit. the ecu keep good tabs on the alt and electronic load detector circuit.