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<blockquote data-quote="SDMF" data-source="post: 79862" data-attributes="member: 412">1.&nbsp; Yes.2.&nbsp; Manufacturers de-warrantee because they've been taken out of the loop regarding ECU mapping.&nbsp; Manufacturers aren't about to start adding more HP than what is stated on the hood, 'cause let's face it, most of the folks doing this already have max HP for their hull.3.&nbsp; Likely nothing assuming your idle RPM's and prop selection don't change.&nbsp; RPM x lower unit gearing x prop pitch x slippage = speed.&nbsp; That formula doesn't change due to a sticker on the outboard's hood.&nbsp; W/EFI and variable valve/cam timing it's no big thing to add HP/TQ with a little advance in timing and some additional fuel.&nbsp; That said, few are going to flash just so they can continue to use their current prop and achieve their current top end more quickly.&nbsp; They're gonna add pitch to increase top end and worry about trolling with a kicker or an electric.</blockquote>

[QUOTE="SDMF, post: 79862, member: 412"] 1. Yes. 2. Manufacturers de-warrantee because they've been taken out of the loop regarding ECU mapping. Manufacturers aren't about to start adding more HP than what is stated on the hood, 'cause let's face it, most of the folks doing this already have max HP for their hull. 3. Likely nothing assuming your idle RPM's and prop selection don't change. RPM x lower unit gearing x prop pitch x slippage = speed. That formula doesn't change due to a sticker on the outboard's hood. W/EFI and variable valve/cam timing it's no big thing to add HP/TQ with a little advance in timing and some additional fuel. That said, few are going to flash just so they can continue to use their current prop and achieve their current top end more quickly. They're gonna add pitch to increase top end and worry about trolling with a kicker or an electric. [/QUOTE]

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