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2015+ S550 Mustangs
5.0L Coyote V8 Engine Modification/Discussion
Tune for GT with 670hp Roush Kit
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<blockquote data-quote="mikengail" data-source="post: 15492766" data-attributes="member: 143239"><p>For what's it's worth, I have a '14 Coyote F150 FX4 with the Roush Phase-2 kit. The kit was installed by the dealer when bought new with the Roush power train warranty. The Roush tune was weak and governed to 95mph, plus the cruise control wouldn't hold selected speeds even slightly uphill or against a good wind. Roush said it was an original Ford problem (it was, by the way...) and Ford said it was a Roush problem (true also, as Roush inherited Ford's problem when they accepted my truck for their warranty...). My dealer offered to keep fighting both sides for me, but I said f*ck the Roush warranty and emailed Justin Starkey at VMP. He said he thought he knew what was happening with the cruise control and wrote me his standard 91 performance tune for the Coyote F150 with some cruise control mods that fixed everything. The whole character of the truck changed entirely. It felt like it was a 1,000lbs lighter and the cruise control worked perfectly. Plus, it now runs like a 12 second vehicle should and improved the gas mileage 1-2mph depending on conditions. It's now the truck I thought I was getting when I first bought it. If I had it to do all over again, I would have just bought a good used low mileage Coyote F150 and installed the VMP Gen-2 Stage-2 kit myself. Would have saved myself thousands of dollars and weeks of lost time. Lessons learned...</p></blockquote><p></p>
[QUOTE="mikengail, post: 15492766, member: 143239"] For what's it's worth, I have a '14 Coyote F150 FX4 with the Roush Phase-2 kit. The kit was installed by the dealer when bought new with the Roush power train warranty. The Roush tune was weak and governed to 95mph, plus the cruise control wouldn't hold selected speeds even slightly uphill or against a good wind. Roush said it was an original Ford problem (it was, by the way...) and Ford said it was a Roush problem (true also, as Roush inherited Ford's problem when they accepted my truck for their warranty...). My dealer offered to keep fighting both sides for me, but I said f*ck the Roush warranty and emailed Justin Starkey at VMP. He said he thought he knew what was happening with the cruise control and wrote me his standard 91 performance tune for the Coyote F150 with some cruise control mods that fixed everything. The whole character of the truck changed entirely. It felt like it was a 1,000lbs lighter and the cruise control worked perfectly. Plus, it now runs like a 12 second vehicle should and improved the gas mileage 1-2mph depending on conditions. It's now the truck I thought I was getting when I first bought it. If I had it to do all over again, I would have just bought a good used low mileage Coyote F150 and installed the VMP Gen-2 Stage-2 kit myself. Would have saved myself thousands of dollars and weeks of lost time. Lessons learned... [/QUOTE]
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5.0L Coyote V8 Engine Modification/Discussion
Tune for GT with 670hp Roush Kit
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