So my "H.O" alternator is only putting out 10.5V

[Eric111e 10+ year member]

I got a "high output" alternator from knukonceptz and i install it. Ive been trying to get my amp to turn on for the past 3 days but i cant because im not getting enough power. So i checked all the wires that said 12V constant and there only getting about 10.4V.

I decided to see what my alternator was putting out and it reads 10.5V. That is at 1500rpm's also. What the hell is wrong with this?

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[lilmaniac2 5,000+ posts]

is your belt tight?

 

[Eric111e 10+ year member]

yes, its tight as can be.

 

[SPL140.2 5,000+ posts]

I got a "high output" alternator from knukonceptz and i install it. Ive been trying to get my amp to turn on for the past 3 days but i cant because im not getting enough power. So i checked all the wires that said 12V constant and there only getting about 10.4V.
I decided to see what my alternator was putting out and it reads 10.5V. That is at 1500rpm's also. What the hell is wrong with this?

send it back, sounds like its a bad alt, just curious is the pulley on the knu alts smaller than your stock pulley?

 

[Eric111e 10+ year member]

im not sure i think it might be the same though. Now i got another problem. I cant get the bolt off the last leg on the alternator. I cant even budge it

 

[Ali1 10+ year member]

what car is it?

 

[SPL140.2 5,000+ posts]

id send it back for sure should have a smaller pulley than the stock alt because it give you more rpms which means more amps at idle //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Blunt 10+ year member]

id send it back for sure should have a smaller pulley than the stock alt because it give you more rpms which means more amps at idle //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

not always true my sunfire has the smallest avalible stock

 

[jeepintn 10+ year member]

not always true my sunfire has the smallest avalible stock

i dont know about knu.. but dom can make u a smaller pulley... jsut email him and tell him ur situation

 

[scottiej 10+ year member]

10.5v? Your batt should rest at 12.6-12.8. If you're reading 10.5 on your dmm at anytime (car on, or off) you need a new batt.

 

[lilmaniac2 5,000+ posts]

^ what he said

 

[BassAddictJ 5,000+ posts]

ya bro check ur battery first.......autozone ftw !!!

 

[Eric111e 10+ year member]

I will re-check the voltage on the battery. I hope its not the battery because its about 1 month old and its an optima. If thats the problem i will try charging it. I will also swap out the old one and see if it makes a difference

 

[Eric111e 10+ year member]

Well it was definetly low voltage. It was only about 9.5V. Tommorow i will go to advanced auto parts and try to get it exchanged. It has a one year warrenty so i should be able to get a new one. Will it void the warrenty if they see i have my power wire/big 3 and stuff like that hooked up to it?

This could possibly be the problem why i dont have enough current going through my remote to turn on my amp right? Everything has low voltage

 

[iamamp3pimp 5,000+ posts]

no....it wont be void unless there is physical damage.