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The Terminator
Terminator Talk
I drastically dropped my fuel temps by over 100F
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<blockquote data-quote="MalcolmV8" data-source="post: 14356837" data-attributes="member: 8854"><p>No it's still a return system. The pumps still run at 100% power and the fuel pressure regulator controls fuel pressure to the rails. In a returnless system there is no fuel pressure regulator and the ECU speeds up and down the pumps to control fuel pressure.</p><p></p><p>For me personally I would hit hesitations at times in returnless mode. Specifically roll races. So say I'm in 3rd at 70 mph at approx 4k rpms just running along the next car waiting to honk off. Load is very low and fuel consumption is minimal, the pumps are not spinning hard at all. 3rd honk hits and you hammer WOT and full boost at 4k RPMs under load instantly. The pumps can't ramp up fast enough and you get a bog/hesitation for a moment and then it takes off. This was one of the main reasons I switched to return style.</p><p></p><p>In the same scenario described above in with the return system as soon as you hammer WOT the FPR just diverts fuel pressure to the rails instead of back to the tank and the pump(s) are already full power. The hit is instant and there's no delay or hesitation at all.</p></blockquote><p></p>
[QUOTE="MalcolmV8, post: 14356837, member: 8854"] No it's still a return system. The pumps still run at 100% power and the fuel pressure regulator controls fuel pressure to the rails. In a returnless system there is no fuel pressure regulator and the ECU speeds up and down the pumps to control fuel pressure. For me personally I would hit hesitations at times in returnless mode. Specifically roll races. So say I'm in 3rd at 70 mph at approx 4k rpms just running along the next car waiting to honk off. Load is very low and fuel consumption is minimal, the pumps are not spinning hard at all. 3rd honk hits and you hammer WOT and full boost at 4k RPMs under load instantly. The pumps can't ramp up fast enough and you get a bog/hesitation for a moment and then it takes off. This was one of the main reasons I switched to return style. In the same scenario described above in with the return system as soon as you hammer WOT the FPR just diverts fuel pressure to the rails instead of back to the tank and the pump(s) are already full power. The hit is instant and there's no delay or hesitation at all. [/QUOTE]
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I drastically dropped my fuel temps by over 100F
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