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2018 Twin turbo build
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<blockquote data-quote="gimmie11s" data-source="post: 16107885" data-attributes="member: 17953"><p>Quick update..</p><p></p><p>Tuning with Lund and he found that my fuel rail pressure was dropping to 35 psi or less at only 4 psi boost even though I have the regulator set at 55 psi. Not good!!</p><p></p><p>Turns out the factory rail is a piece of shit. The port injection side of the rail is fed by the high pressure side of the rail.</p><p></p><p>Problem is port side is only fed with one tiny port on the driver side seen below.</p><p></p><p>Instead of buying $400+ worth of new rails and fittings I simply added another feed to the factory rail on the passenger side.</p><p></p><p>Logs confirm I now hold 55+ psi fuel pressure under boost. I’ve tested up to 10 psi boost and still holds. Hell yes!</p><p></p><p>Side note... that 10 psi hit was today on the highway in Mexico at 60 mph in 4th gear..... it absolutely wastes the tires from a 60 roll forcing me to pedal it into 5th and 6th! Insane.</p><p></p><p>[ATTACH=full]1545934[/ATTACH]</p><p></p><p>[ATTACH=full]1545935[/ATTACH]</p><p></p><p>[ATTACH=full]1545936[/ATTACH]</p><p></p><p>[ATTACH=full]1545937[/ATTACH]</p><p></p><p></p><p></p><p></p><p>Sent from my iPhone using svtperformance.com</p></blockquote><p></p>
[QUOTE="gimmie11s, post: 16107885, member: 17953"] Quick update.. Tuning with Lund and he found that my fuel rail pressure was dropping to 35 psi or less at only 4 psi boost even though I have the regulator set at 55 psi. Not good!! Turns out the factory rail is a piece of shit. The port injection side of the rail is fed by the high pressure side of the rail. Problem is port side is only fed with one tiny port on the driver side seen below. Instead of buying $400+ worth of new rails and fittings I simply added another feed to the factory rail on the passenger side. Logs confirm I now hold 55+ psi fuel pressure under boost. I’ve tested up to 10 psi boost and still holds. Hell yes! Side note... that 10 psi hit was today on the highway in Mexico at 60 mph in 4th gear..... it absolutely wastes the tires from a 60 roll forcing me to pedal it into 5th and 6th! Insane. [ATTACH=full]1545934[/ATTACH] [ATTACH=full]1545935[/ATTACH] [ATTACH=full]1545936[/ATTACH] [ATTACH=full]1545937[/ATTACH] Sent from my iPhone using svtperformance.com [/QUOTE]
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