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<blockquote data-quote="Kross6622" data-source="post: 6347863" data-attributes="member: 613869">Currently I have the stock alt and stock battery in my 07 Grand Prix along with 1/0 wire from the pos of alt to pos of battery and battery neg to chassis. I plan on wiring my engine block when i get some extra money/time.My voltage reads 13.7 ~ 13.8 with the car onI have a friend who has an 06 grand prix (Same engine etc...)He has 1/0 wire from the alt to battery and from the battery neg to a bolt on the engine and an autocraft titanium battery and his voltage with the car on is 14.4~14.5Why is his voltage higher? The battery? We both have the same alternator, etc.Would it be more beneficial to upgrade the battery first or would running the 1/0 gauge from the engine block to the negative of the battery like he did.I plan to do both but for the next 2-3 weeks i can only afford one of these. There is a reason behind this if anyone is curious PM not a big deal just have to wait for some money etc...Also i plan to run ~2000 watts rms when all said and done. I plan on upgrading my Alt, and I want to keep it to 1 battery up in the front. What battery do you think would work good, I know adding a second in the back would work the best, but this is a daily driver and i think with an alt upgrade and a good battery up front i wont have any issues.Thanks in advance for the help.</blockquote>

[QUOTE="Kross6622, post: 6347863, member: 613869"] Currently I have the stock alt and stock battery in my 07 Grand Prix along with 1/0 wire from the pos of alt to pos of battery and battery neg to chassis. I plan on wiring my engine block when i get some extra money/time. My voltage reads 13.7 ~ 13.8 with the car on I have a friend who has an 06 grand prix (Same engine etc...) He has 1/0 wire from the alt to battery and from the battery neg to a bolt on the engine and an autocraft titanium battery and his voltage with the car on is 14.4~14.5 Why is his voltage higher? The battery? We both have the same alternator, etc. Would it be more beneficial to upgrade the battery first or would running the 1/0 gauge from the engine block to the negative of the battery like he did. I plan to do both but for the next 2-3 weeks i can only afford one of these. There is a reason behind this if anyone is curious PM not a big deal just have to wait for some money etc... Also i plan to run ~2000 watts rms when all said and done. I plan on upgrading my Alt, and I want to keep it to 1 battery up in the front. What battery do you think would work good, I know adding a second in the back would work the best, but this is a daily driver and i think with an alt upgrade and a good battery up front i wont have any issues. Thanks in advance for the help. [/QUOTE]

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