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SVTPerformance's Chain of Restaurants
The Distillery
2008 GT500 switch to E85
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<blockquote data-quote="c6zhombre" data-source="post: 15545585" data-attributes="member: 76381"><p>The vmp boost a pump has a proven track record to work reliably with the factory shelby pumps and remain returnless.....as long as the pumps are up to par before the install. I would think considering you are running 600+ wheel right now, your tuner probably has confidence the pumps are working well according to the datalogs or he wouldn't have let you drive away with the factory system intact.</p><p></p><p>My thoughts are on your 5.4 that you are going to be just fine at 700 on ethanol. But it's your car and you are the one that has to sleep at night.....even if you left the pulley psi setup as is, I'd still be in favor of seeing you run ethanol. It has so many safety advantages over pump 93 they are too numerous to list. The safety margin is so much greater I believe you can kick the boost up considerably from where you are now and still be as safe as your current pump gas setup. At the end of the day, if you are going thru the $$$ and time to switch to E85, take advantage of the opportunity and spin the blower past 14psi. If the idea of 20psi is too much....split the difference and run 17psi.</p><p></p><p>As far as return vs returnless.....return would be warranted if you were going to run BIG time boost past where I believe you are currently envisioning. Like maybe a 2.9 whipple spinning it hard. I think for a fraction of going full return (new pumps, new fuel hat, regulator, lines, lots of labor), you can stay returnless and be up and running in no time. With plenty of fuel delivery for your current goals and then some (i.e. Like spinning to 20 which your blower can do).</p></blockquote><p></p>
[QUOTE="c6zhombre, post: 15545585, member: 76381"] The vmp boost a pump has a proven track record to work reliably with the factory shelby pumps and remain returnless.....as long as the pumps are up to par before the install. I would think considering you are running 600+ wheel right now, your tuner probably has confidence the pumps are working well according to the datalogs or he wouldn't have let you drive away with the factory system intact. My thoughts are on your 5.4 that you are going to be just fine at 700 on ethanol. But it's your car and you are the one that has to sleep at night.....even if you left the pulley psi setup as is, I'd still be in favor of seeing you run ethanol. It has so many safety advantages over pump 93 they are too numerous to list. The safety margin is so much greater I believe you can kick the boost up considerably from where you are now and still be as safe as your current pump gas setup. At the end of the day, if you are going thru the $$$ and time to switch to E85, take advantage of the opportunity and spin the blower past 14psi. If the idea of 20psi is too much....split the difference and run 17psi. As far as return vs returnless.....return would be warranted if you were going to run BIG time boost past where I believe you are currently envisioning. Like maybe a 2.9 whipple spinning it hard. I think for a fraction of going full return (new pumps, new fuel hat, regulator, lines, lots of labor), you can stay returnless and be up and running in no time. With plenty of fuel delivery for your current goals and then some (i.e. Like spinning to 20 which your blower can do). [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Distillery
2008 GT500 switch to E85
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