I have a 2020 acura ILX and am looking to put some subs along with a another amp in it. Power draw will be at least 1000 watts constant. I was planning on getting a HO alternator with at least 220 amps. I've only put subs in vehicles older than 2005. My buddy told me that in newer cars the ECU controls the alternator output based on need. Will the draw of the amp be included in that? He told me that I'd have to install a external voltage regulator and do a bunch of extra work and even then my dash would light up like a Christmas tree. Is this true, and could I flash the ecu to change this or somehow include the draw of the new amp? Thanks for any relevant info.