14.4v - 13.8v drop... is it the fuse??

[Truconcept 58]

So I'm getting a voltage drop to 13.8 after the second song or so

I check with my voltmeter i bought cause some1 on here told me i better buy 1

and the reading is 14.4 before the fuse

13.8 after

 

i'm wondering if this is from the resistance the warm fuse?

im running the proper size fuse

1 run of 1/0 gauge

 

now what I really want to know is if the drop is from the fuse resistance

is this something i should worry about going full tilt?

 

should i add another run of 1/0 gauge? 

(i have 20ft of knu ofc forsale/laying around but id have 2 buy another fuse)

 

stock alt

2 yellow tops

hifonics colossus bridged @ 2ohm  (3600 watts supposedly)

RF p400.2 -mid

RF p200.2 -high

(2) DD 2512       

 

also at red lights when going full tilt i hit 12.3-12.1

is it dangerous to play loud at that voltage level?

what if it dips to 11.8?

 

Thanks

[jonbearsmt 919]

 the 14.4 before and the 13 after i would look into what kind of fuse holder you have.. it seems to be cunducting poorly,  check the connections and look for any corrosion and so forth

 

 adding another run would not hurt.

 

  why would you play your stereo full tilt at a redlight, that is rude, and give car audio a bad name.  please stop,

 

 but yes,  your amp will start clipping, and your amp can catch on fire from playing with low voltage, not saying it will at 12 volts. but 10 volts yup it sure can.

[Julian 641]

average drop between cars can vary, but in my car with 3 runs of 4/0 i drop .3-4v between the front and rear.

[pmureika 31]

Are you measuring right at the fuse?

[jonbearsmt 919]

Oh for some reason i thought he meant right after the fuse .. not at the end of his run

[pmureika 31]

Thats what I assumed, across the fuse not at the amp.

[Polish 9]

I assumed he meant right after as well the way it was worded. If you meant it was 14.4 up front and 13.8 in the back, that might be just the wire heating/warming up and causing a bit more resistance.

[pmureika 31]

x2

[shizzzon 461]

If you guys are assuming right, the reason for a drop in voltage in the rear is their is no ground run from front to rear. 

 

Every vehicle out there i've measured loses between 0.3-1.2v by not having a ground run.  

[AXEHAMMER 16]

The way I read it he was measuring right before and right after the fuse....

[AXEHAMMER 16]

And if that's correct, jon is spot on, that's a BAD holder

[shizzzon 461]

And if that's correct, jon is spot on, that's a BAD holder

 

And, hehe, if that's the case, i'm ALMOST..... pretty close, willing to bet it's a knukonceptz fuse holder if the voltage drop actually occurs as part of the block\fuse itself.

[Billetproof97' 2]

No h.o alt?

[Truconcept 58]

And if that's correct, jon is spot on, that's a BAD holder

 

And, hehe, if that's the case, i'm ALMOST..... pretty close, willing to bet it's a knukonceptz fuse holder if the voltage drop actually occurs as part of the block\fuse itself.

 

that is right, knu fuse holder

 

 

 

No h.o alt?

 

nope

 

 

 

 

 

 

If you guys are assuming right, the reason for a drop in voltage in the rear is their is no ground run from front to rear. 

 

Every vehicle out there i've measured loses between 0.3-1.2v by not having a ground run.  

 

i got a run of 1/0 gauge from from battery (-) to rear batt (-) too

 

 

 

 the 14.4 before and the 13 after i would look into what kind of fuse holder you have.. it seems to be cunducting poorly,  check the connections and look for any corrosion and so forth

 

 adding another run would not hurt.

 

  why would you play your stereo full tilt at a redlight, that is rude, and give car audio a bad name.  please stop,

 

 but yes,  your amp will start clipping, and your amp can catch on fire from playing with low voltage, not saying it will at 12 volts. but 10 volts yup it sure can.

 

 

man i was impressed til you said that shit about not going full tilt at the red light

when i play loud at red lights there is no other cars around me

infact rarely are there any cars around me out here

 

and i just used red light as an example of the car stopped

i see it when i demo at my friends too

 

no corrosion, fresh equipment

 

and its 14.4-14.2 before and 13.8 after not 13

 

 

 

 

 

 

and yes guys i was testing right around the fuse

as i am noob and there is a little wire showing on both ends

 

I'm so lost as to how a fuse holder can cause this problem

when a fuse holder is so simply designed and applied

 

ive heard alot of bad stuff about knu fuse holders and dist blocks

 

 

so what is the recommendation?..............

add another run?

change to a diff fuse holder?

keep it as is since 13.8 is as low as it sits?

[frogcase2002 393]

You should probley be good. Iv seen some peoples car show the high 13s always. Couldn't hurt to try a different fuse holder just to see if there is a difference

[Godsmack 360]

It's not just other cars but people who live near by.

J

[95Honda 486]

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

[Truconcept 58]

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

 

troll?

[shizzzon 461]

the way how their furrow fittings work sucks.  

 

I'm curious on something though since that much voltage drop across just a few inches is rare.. how hot does it feel if you place your hand over and around the fuse holder?  Feel both ends, does any of it feel warm or hot?

 

It should feel cold.

[95Honda 486]

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

 

troll?

Your joking, right?

[nem 2,019]

If you really want to be sure it is the fuse holder, measure the drop across the holder. Put one test lead on the input of the holder and one on the output. Put it on DC volts. With your system playing, what is the highest reading you get?

Until you do this, it is speculation about the holder...

troll?

Absolutely not! He is on the Tech team for a reason!

[frogcase2002 393]

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

 

troll?

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

 

troll?

I don't get it?

[Truconcept 58]

 

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

 

troll?

> 

If you really want to be sure it is the fuse holder, measure the drop across the holder.  Put one test lead on the input of the holder and one on the output.  Put it on DC volts.  With your system playing, what is the highest reading you get?

 

Until you do this, it is speculation about the holder...

 

troll?

I don't get it?

 

 

he is telling me something to do

that i have clearly done

 

its either lack of reading or trolling so idk sorry

[Truconcept 58]

the way how their furrow fittings work sucks.  

 

I'm curious on something though since that much voltage drop across just a few inches is rare.. how hot does it feel if you place your hand over and around the fuse holder?  Feel both ends, does any of it feel warm or hot?

 

It should feel cold.

 

it is a little warm all around but not so much that i cannot touch

i'm nervous about how much worse things will be in the summer

 

ive had problems with scosche fuses

i figured going with knu i would be ok.....

 

It seems a little off though because I am only running a stock alt

its not like im pushing 220 amps through the fuse

and it is a 300 amp fuse anyways

 

idk maybe the fuse holder is way less conductive

than my ofc 1/0 gauge

so when the current hits the fuse it has issues

all thats guessing tho

 

i just thought a fuse holder is only 2 pieces of metal

how dumb does a company have 2 be 2 mess it up

[jonbearsmt 919]

no you measured voltage. hes telling you to measure the resistance of the fuse holder.... NOT the same thing.