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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Tune plus downpipes, worth it??
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<blockquote data-quote="FORZDA 1" data-source="post: 1290932" data-attributes="member: 26637"><p>The relatively tiny OEM turbo can't move enough air to make the OEM piping cause a significant reduction in potential power. Thusly, the aftermarket piping doesn't make a significant improvement. The turbo makes more power by moving MORE air by compressing it. THE restriction on a turbocharged engine is the size (and shape) of the turbine wheel and housing. If the exhaust/piping diameter is smaller than the turbine outlet diameter, then you should consider opening it up to the minimum turbine outlet diameter.</p><p></p><p>This is why the SPD adapters were introduced. Technically they should be an improvement however, the perceived "restriction" is so tiny that they're essentially not worth the effort.</p><p></p><p>You can spend the money to install ALL of the bolt-on aftermarket parts and will likely be able to measure a <em>slight</em> increase in power (if tuned to take advantage of it). If you take that same money and invest in a <em>slightly</em> larger turbo (turbine and compressor) while leaving everything else the same, you will see a <em>large</em> improvement that will be worth the effort.</p><p></p><p>Note that the <em>slight</em> improvement will likely only be seen on a good dyno, not in any actual performance increase. Hence why I recommend a simple timed acceleration test preferably at a sanctioned track where the timers are certified.</p></blockquote><p></p>
[QUOTE="FORZDA 1, post: 1290932, member: 26637"] The relatively tiny OEM turbo can't move enough air to make the OEM piping cause a significant reduction in potential power. Thusly, the aftermarket piping doesn't make a significant improvement. The turbo makes more power by moving MORE air by compressing it. THE restriction on a turbocharged engine is the size (and shape) of the turbine wheel and housing. If the exhaust/piping diameter is smaller than the turbine outlet diameter, then you should consider opening it up to the minimum turbine outlet diameter. This is why the SPD adapters were introduced. Technically they should be an improvement however, the perceived "restriction" is so tiny that they're essentially not worth the effort. You can spend the money to install ALL of the bolt-on aftermarket parts and will likely be able to measure a [I]slight[/I] increase in power (if tuned to take advantage of it). If you take that same money and invest in a [I]slightly[/I] larger turbo (turbine and compressor) while leaving everything else the same, you will see a [I]large[/I] improvement that will be worth the effort. Note that the [I]slight[/I] improvement will likely only be seen on a good dyno, not in any actual performance increase. Hence why I recommend a simple timed acceleration test preferably at a sanctioned track where the timers are certified. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Tune plus downpipes, worth it??
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