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<blockquote data-quote="keep_hope_alive" data-source="post: 8169851" data-attributes="member: 576029">a 270A alt is overkill for the system, but it shouldn&#039;t be an issue.&nbsp; note that some H.O. alts in some cars may require reprogramming of the ECM in order to not throw codes.&nbsp; we ran into that when putting a 240A in a 2005 Scion tC.&nbsp; not to say you shouldn&#039;t get a larger alt, it is a good idea if you don&#039;t expect issues.the big 3 and a good AGM battery are definitely good items to consider.wiring methods are a huge determination of power transfer &quot;efficiency&quot;. grounds are vital and usually overlooked.share pics of the shop&#039;s install.&nbsp; show all connections, power, ground, speaker at the amp.&nbsp; show connections made at the speakers (if you feel comfortable removing them to inspect the work done).&nbsp;&nbsp; we can likely give you ideas for improving their installation (such as improved seals at speakers).</blockquote>

[QUOTE="keep_hope_alive, post: 8169851, member: 576029"] a 270A alt is overkill for the system, but it shouldn't be an issue. note that some H.O. alts in some cars may require reprogramming of the ECM in order to not throw codes. we ran into that when putting a 240A in a 2005 Scion tC. not to say you shouldn't get a larger alt, it is a good idea if you don't expect issues. the big 3 and a good AGM battery are definitely good items to consider. wiring methods are a huge determination of power transfer "efficiency". grounds are vital and usually overlooked. share pics of the shop's install. show all connections, power, ground, speaker at the amp. show connections made at the speakers (if you feel comfortable removing them to inspect the work done). we can likely give you ideas for improving their installation (such as improved seals at speakers). [/QUOTE]

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