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The Terminator
Engine/Tuning
Self Tuning With SCT Pro Racer
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<blockquote data-quote="Blown38" data-source="post: 16426643" data-attributes="member: 88849"><p>From Decipha's site.</p><p></p><p><span style="font-size: 12px"><strong>Injector Slope Tuning</strong></span></p><p>The injector slopes can be thought of as global fuel multipliers. A smaller injector slope (smaller injector size) will spray MORE FUEL than a larger injector to deliver the same air/fuel ratio. Thus, decreasing the injector slope will RICHEN the fuel mix. This can ONLY be done when the MAF curve is correct and measuring airflow accurately.</p><p><span style="font-size: 12px"><strong>Fuel Pressure</strong></span></p><p><u><strong>Changing the fuel pressure will change the Injector Slopes and Voltage Offset</strong></u> for ballpark quick adjustment, I compensate 1% per psi, so if you up the pressure from 40 to 60, i would multiply the slopes by 1.20 if I drop the pressure from 40 to 20, i would multiply the slopes by 0.80, if i went from 40 to 45 the i would multiply by 1.05 not exact, but good enough for government work, also keep in mind most injectors are rated at 43.5 psi where as a factory ford fuel pressure regulator will regulate the injection (delta) pressure at 39psi</p></blockquote><p></p>
[QUOTE="Blown38, post: 16426643, member: 88849"] From Decipha's site. [size=3][b]Injector Slope Tuning[/b][/size] The injector slopes can be thought of as global fuel multipliers. A smaller injector slope (smaller injector size) will spray MORE FUEL than a larger injector to deliver the same air/fuel ratio. Thus, decreasing the injector slope will RICHEN the fuel mix. This can ONLY be done when the MAF curve is correct and measuring airflow accurately. [size=3][b]Fuel Pressure[/b][/size] [U][b]Changing the fuel pressure will change the Injector Slopes and Voltage Offset[/b][/U] for ballpark quick adjustment, I compensate 1% per psi, so if you up the pressure from 40 to 60, i would multiply the slopes by 1.20 if I drop the pressure from 40 to 20, i would multiply the slopes by 0.80, if i went from 40 to 45 the i would multiply by 1.05 not exact, but good enough for government work, also keep in mind most injectors are rated at 43.5 psi where as a factory ford fuel pressure regulator will regulate the injection (delta) pressure at 39psi [/QUOTE]
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