2012 Subaru Sport Limited 5 door (AMP/WATT Q)

[mav1989]

Hello all. Been gosting this site, love all the work done here. I need some of your guy's advice.

I have a 2012 Subaru Sport Limited 5 door (hatch back). Ive already measured out my space etc. I can work in about 4ft cubic space in the trunk while still keeping it below the cargo cover and still leave a little space for other stuff. This is my daily driver, will need to occasionally get groceries etc.

But on to the question:

What do you guys think I can safely power? The alternator is only 110. Since this car is still new (less 6 months old) I want to keep as much stock as possible. IE. I want to try to avoid big 3, replacing alt etc aka void as little warantees as possible. I currently have a stock battery. Swapping that out is no problem.

How much can I push?

[RyanJ]

Once you see light dimming / get a VM-1 and wen your volts get lower, get a batt or alt. around 1000-1500 should be okay.

[mav1989]

Once you see light dimming / get a VM-1 and wen your volts get lower, get a batt or alt. around 1000-1500 should be okay.

perfect. I was hoping to run ~1200 for 2x type r's or something along those lines. Great, thanks!

Problem w/ replacing alt on these cars (or so I hear) is that it runs from the alt, to the fuze box before hitting the battery which poses a few problems?

[RyanJ]

Yeah I wouldn't doubt it having a few extra steps for replacing the alt. my friend had 2000ish watts with no big 3 or H/O alt and his light started to dim but he said fuck it n kept going. His car died on the freeway with a burnt battery haha

[Emmet]

Yeah being honest avoiding the big 3 is a bad idea, all it does really is create a path of lesser resistance to cope with the excess pull if you get me?

It can be removed and will put a little less strain on your cars system. Something worth doing in a new car.

[Crandis16]

With the HO alt and no big 3, it'll be like pumping water from a fire truck trough a garden hose. It'll be restricted due to the size of wire. Definitely get a battery too if you get a HO alt. you'd probably be fine with just an extra battery too, but might as well do alt too in case you decide to upgrade.

[95legwagon]

subaru alts are really easy to replace. and doing the big 3 i just took off the wire that goes to the fuse box and replaced it with the wire i made (with a fuse rated to the alt). no problems. the fuseable link is the problem with the stock wiring.... if it burns out then no power to car.

hope this helps