Jake2375 Posted May 3, 2019 Report Share Posted May 3, 2019 https://www.instagram.com/p/BiRx6X-gFT1/ , any suggestions would be great , its a 2017 subaru impreza, so i have no idea about the big 3 , it looks very confusing. the alt positive connects to the fuse box with a different gauge wire. plus i cant find a high output alt to fit it at the moment. Link to comment Share on other sites More sharing options...
Jake2375 Posted May 3, 2019 Author Report Share Posted May 3, 2019 i dont like it drops down to to 13v at some notes Link to comment Share on other sites More sharing options...
Jake2375 Posted May 3, 2019 Author Report Share Posted May 3, 2019 oh to make it more clear i got a 500-bd w amp powering two rockford P3s with a stock alternator , with a 2 farad rockford cap Link to comment Share on other sites More sharing options...
Joshdashef Posted May 3, 2019 Report Share Posted May 3, 2019 First off, welcome to the forum man What vehicle are you using? Some have little nuances that have to be addressed in order to do this upgrade. For example, if I am remembering right some trucks have a sensor on their negative battery terminal or positive that you have to integrate with and cannot bypass, more than likely someone somewhere has gone through the trouble of figuring out what you have to do for that... Now for alternators check out Singer, Mechman, US Alts, etc. Get name brand or don't bother - avoid ebay high output alts they are a waste of your money down the road. Good companies come with good warranties/servicing For the big three/four/etc. whatever you want to call it, you are essentially upgrading factory grounds for your underhood battery. Upgrade the following wires with at least one run of 1/0 or two runs of 4 gauge; 1. Battery negative to frame ground 2. Battery negative to engine/alternator (most high output alternators require you to run a wire for BOTH the positive and negative to the battery - only the positive requires fusing within 6 inches to a foot preferably coming out of the alternator.) 3. Battery Positive to alternator Here is a video showing you how to do the big three upgrade: (Optional) 4. Engine/alternator to frame ground Here is a video that explains the big four if you want to do this optional step. Hope this helps out SMD Tool Map (2022): https://www.stevemeadedesigns.com/board/topic/220267-smd-tool-map-2022/ My Port Size Calculator (in progress): https://www.stevemeadedesigns.com/board/topic/217087-port-size-calculator-in-progress/ Common Port Walls for a Slot Port: https://www.stevemeadedesigns.com/board/topic/217076-common-port-walls-why-it-matters-to-your-box/?tab=comments#comment-3240313 Link to comment Share on other sites More sharing options...
Kyblack76 Posted May 3, 2019 Report Share Posted May 3, 2019 Dropping to 13v, "sometimes" is perfectly acceptable. This is 12v stuff after all..... Save your money. A 500 watt amp, even wired wicked low, wont pull dick.... SMD SUPER SELLER The Burban Build Blazer Build sold Acura trunk build sold Link to comment Share on other sites More sharing options...
Joshdashef Posted May 3, 2019 Report Share Posted May 3, 2019 30 minutes ago, Kyblack76 said: Dropping to 13v, "sometimes" is perfectly acceptable. This is 12v stuff after all..... Save your money. A 500 watt amp, even wired wicked low, wont pull dick.... Is possible damage only likely when you dip into the 11s and 10s? Or can it happen at 12s? SMD Tool Map (2022): https://www.stevemeadedesigns.com/board/topic/220267-smd-tool-map-2022/ My Port Size Calculator (in progress): https://www.stevemeadedesigns.com/board/topic/217087-port-size-calculator-in-progress/ Common Port Walls for a Slot Port: https://www.stevemeadedesigns.com/board/topic/217076-common-port-walls-why-it-matters-to-your-box/?tab=comments#comment-3240313 Link to comment Share on other sites More sharing options...
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