might be a stupid question...

[Naxis2k1 10+ year member]

when you got a nice load beign sucked up by your amps does your battery light come on? cuz mine does but my voltage does not drop so should i be ok?

if it helps an iam running a stock 105 amp alt with yellow top

only amp is car running right now is the mtx 1004.

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[UndercoverPunk 5,000+ posts]

I'll bet 5 dolla your voltage goes down.

 

[johnecon2001 5,000+ posts]

i'll bet you eleventy billion

 

[UndercoverPunk 5,000+ posts]

me or him?

 

[shltplease 10+ year member]

my voltage does not drop

Use a good quality multimeter and I'll bet you see your voltage drop. At max output, you are consuming more than half of your available current from your alternator (if I did the math correct). 70A = (500W x 2)/14.4volts or 35A = (125W x 4)/14.4volts. Doesn't look good for your electrical system.

 

[Chevyaudio 5,000+ posts]

yep voltage drop is very likely

 

[Naxis2k1 10+ year member]

well iam sure it does too....... but not enough that i notice like a bass hit on my dashes volt gage... now i guess my real question is is this going to f*ck anything up? and is the light coming on because of the slight voltage drop? the reason i ssay slight voltage drop is because it sorta twickles every once it a while like not affecting it much. but enough to spraticlly twickle

 

[shltplease 10+ year member]

twickle

Is that a technical term I'm not familiar with? Just kidding. I don't see how it will do any damage as long as everything is wired correctly. You may want to consider big 3 and/or a larger alternator to eliminate this problem. However, I don't think you're twickle will cause any permanant damage.

 

[Naxis2k1 10+ year member]

sorry for using any childish terms but cant think of any other way to explain it. The big3 has already been done on my van and i did have a HO alt but it burnt out(still got no idea why i only had it for a month.) can somone explain to me how adding another battery helps your charging system? the reason i ask is if your single alternator cant keep the battery properly charged how does adding a nother item to be charged help any?

 

[shltplease 10+ year member]

Adding another battery won't do anything for your charging system. Your alternator takes care of the charging. A second battery will only tax your existing alternator more. You may have a faulty voltage regulator or something to make your alternator burn out so quickly. Are you sure when you did the big 3 you wired everything up properly? Re-check your grounds (edit: and all connectors) - meaning make sure they are on bare smooth rust free metal with a good solid connector soldered on or crimped on really good. You may be well suited to let someone take a look at this with some diagnostic equipment. good luck.

 

[Moe Lester 10+ year member]

i cant tell if my dashs volt gauge moves when i burp 4 VR1000Ds @ .45 ohms each... but i know for **** sure that the voltage is dropping like crazy

 

[Naxis2k1 10+ year member]

is it just me or is anyone else having trouble with there yellow top optimas?