what kind of drop should i be seeing from a pair of strapped 1500's @ 1 ohm for a burp? I'm using a nsb-90 with the car off. it goes from 13.8- low 11's. is this right? i'm going to start and run my car in the morning and see what the drop is!

Edited June 6, 200718 yr by stevew007

well with the battery charging for 7 hour's I ran the car and it went from 14.4-11.4 this don't sound right! wonder if my battery is taking a crap on me

u have the car on?

Give it some gas, while taking the reading

u have the car on?

Give it some gas, while taking the reading

i always test out side the car and with a battery charger.

Test it with the car running at 1200 rpm and up no battery charger your looking for real time and I think It would depend on freq I would test it at it's tunning freq and then maybe a slow sweep? but usually we try to keep it less than 1 volt everyday and slightly different for comps(dynamic)varies on current draw and amps eff. at full power. Sounds like you need some Battcaps or bigger alt .Try to stay away from deep cycle batt though there made for 12.5 volts