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The Terminator
Engine/Tuning
Return Style fuel system question.....Fuel Pressure
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<blockquote data-quote="Blown38" data-source="post: 12938322" data-attributes="member: 88849"><p>If FP is always 58 psi the injectors will flow like 63lb injectors at 18 psi boost. And flow more at low/no boost or especially vacuum. Your injector flow rate will not be linear. And your MAF curve will probably have big steps in it to keep the AFR correct.</p><p></p><p>It is not the correct way to do it. And its not hard to set it up the correct way.</p><p></p><p>The most common reason to raise base pressure is to make your injectors act bigger. If they are on the border for the HP you are making. But if you raise base pressure and reference vacuum/boost to the regulator like you should, you better have enough fuel pump/line capacity to flow the extra fuel in the upper rpm/boost range where you really need it.</p></blockquote><p></p>
[QUOTE="Blown38, post: 12938322, member: 88849"] If FP is always 58 psi the injectors will flow like 63lb injectors at 18 psi boost. And flow more at low/no boost or especially vacuum. Your injector flow rate will not be linear. And your MAF curve will probably have big steps in it to keep the AFR correct. It is not the correct way to do it. And its not hard to set it up the correct way. The most common reason to raise base pressure is to make your injectors act bigger. If they are on the border for the HP you are making. But if you raise base pressure and reference vacuum/boost to the regulator like you should, you better have enough fuel pump/line capacity to flow the extra fuel in the upper rpm/boost range where you really need it. [/QUOTE]
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Return Style fuel system question.....Fuel Pressure
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