Lights dim with H.O alternator, But no system?

[Eric111e 10+ year member]

I have a 200 amp alternator i bought from knukonceptz. I installed it a couple weeks ago and i did the big 3 tonight. I dont have my system hooked up yet but i did notice that when my explorer is at idel rpm's at night and i have my nights on, the light seem to get a little dimmer. Then when i hit the gas the get a little brighter. Is there something wrong? Or is the idel rpm's just lower than on my stock? When the rpm's are at 1000 it seems just fine.

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[Eric111e 10+ year member]

I forgot to say i did the big 3 with 0 guage wire.

 

[UNDERGROUND_BUM 10+ year member]

no nothing wrong u get less amps at idle which will create that

 

[Eric111e 10+ year member]

no nothing wrong u get less amps at idle which will create that

Thats what i figured, thanks for the help

 

[QtrHorse 10+ year member]

My lights do the same thing but my lights at idle are brighter now than before, they just get a little brighter when I rev the motor. My new alternator puts out more amps at idle than my stock unit did.

 

[Eric111e 10+ year member]

yeah, its not really a big deal. I just wanted to make sure this is normal and theres nothing wrong with my installation.

 

[draarong2004 10+ year member]

if it bugs you that much, they make a "better" pulley for your alt to have it rev higher, I don't recomend it though, unless the alt is designed to work at so many rpms

 

[Eric111e 10+ year member]

no, i would rather not get into all that. As long as its putting up alot of amps when its not at idel its all good.

 

[baseballer1100 5,000+ posts]

Mine does the same exact thing. but i want more amps at idle....

 

[draarong2004 10+ year member]

i wonder if they make cvt pulleys for alts? now that'd be cool, then you'd always get full output from your alt no matter how fast or slow your engine is running....

 

[Eric111e 10+ year member]

Maybe someday i will look into pulleys, but for now its fine. I dont even have my subs yet.