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2013-14 Shelby GT500
HEADER INSTALL AFTERMATH
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<blockquote data-quote="Norton" data-source="post: 16586135" data-attributes="member: 145307"><p>The answer to your first question is the factory boost gauge is NOT reliable. IIRC, it used some kind of computer-based calculation to estimate boost level. It wasn't tremendously accurate when you were stock. It's inaccuracies were probably amplified when you modded. If you want to know what's really happening, install a dedicated boost gauge with a proper sensor. Another, even more critical, value to monitor is AFR. The factory wideband sensors are good, but you'll need something to extract the info they provide from the ECU and display it for you. There are probably many options, but I used an <a href="https://www.aeroforcetech.com/products_interceptor.html" target="_blank">Aeroforce Interceptor</a> before transitioning to an nGauge when I went with an aftermarket tune a few years ago.</p><p></p><p>FWIW, I agree with [USER=12694]@NoSlowGT[/USER] - I'd talk with my tuner about an update for the exhaust change. If anything, headers should allow the car to breath more easily, reducing (rather than increasing) boost. Breathing better, however, comes with the possibility of leaner AFRs which can damage the engine.</p></blockquote><p></p>
[QUOTE="Norton, post: 16586135, member: 145307"] The answer to your first question is the factory boost gauge is NOT reliable. IIRC, it used some kind of computer-based calculation to estimate boost level. It wasn't tremendously accurate when you were stock. It's inaccuracies were probably amplified when you modded. If you want to know what's really happening, install a dedicated boost gauge with a proper sensor. Another, even more critical, value to monitor is AFR. The factory wideband sensors are good, but you'll need something to extract the info they provide from the ECU and display it for you. There are probably many options, but I used an [URL='https://www.aeroforcetech.com/products_interceptor.html']Aeroforce Interceptor[/URL] before transitioning to an nGauge when I went with an aftermarket tune a few years ago. FWIW, I agree with [USER=12694]@NoSlowGT[/USER] - I'd talk with my tuner about an update for the exhaust change. If anything, headers should allow the car to breath more easily, reducing (rather than increasing) boost. Breathing better, however, comes with the possibility of leaner AFRs which can damage the engine. [/QUOTE]
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HEADER INSTALL AFTERMATH
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