How big is the wire from your alternator to the batt?

 

whatever the factory wire is

 

Run at least 4 awg (or bigger) , and a 4awg ground from the block to the batt, at the very least this will charge the batt faster. I dont think the alternator is doing much in your car however as per my last post, if you had a bigger alt it would be better.

ps why do you care anyways?

 

you wanna help me do the big 3?

 

Peeps seem to think youre a newbie lol, The situation however doesent make sense,like how much spl are you losing?
Anyways my guess would be the ecu and coil,fuel injectors, etc etc, the essentials that make a car run are robbing precious voltage from amps lol.

 

but i am a noob.

and i think you might be right.

i had something similar in my jeep, but in the jeep the score did not change with car on or off. In this car it actually goes down.

 

Funny the way different autos deal with systems, in my z34 if i was idling and cranked the system the amp would suck every last drop of voltage and the car would stall lol. But it was a kicker 1200.1 and they are some power suckin****in amps @ 1 ohm.

 

I'm interested to know what's happend because I have a similar problem. If I do my first run without recharge my battery with a charger, I always do 0.4 db better than the second run when I have the time to recharge my battery.

Maybe if the amps saw 14.4 volts, try to push more watts and the voltage drop quickly at 11 volts, the amps are less stable then when it start at 12.7 volts and the score is less.

 

I gain with mine off to i put a toggle switch on my deck and shut the ignition off witch kills everything in mine even the cig lighter lol i gained over a db and i never figured it out but it works lol

 

Hay yuli i happen to no in this case just because my motor in the lemans is almost the same as your rex that a chev 3.1 alt will almost bolt right on lol and there 105 amp stock wich is a big step up from the 60 amp on the honda dont no if this a help or not but something to help