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2011-2014 Mustangs
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e85 and paxton with jms BAP
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<blockquote data-quote="Shaun@AED" data-source="post: 15140051" data-attributes="member: 32381"><p>Normally we do not run out of fuel with the Low boost setups on E85 and a JMS BAP set correctly, but every once in a while we do get a car that runs out of pump. Roughly 10% of the Paxton/Vortech setups we see on E85 with the stock Fuel pump will run out at the top of the RPM band. (We do not see this with TVS, Whipple, or Turbo cars FYI) Here is the last car that ran out of fuel with E85 on my dyno:</p><p></p><p>Notice at 7300 fueling is good, short terms are even pulling a little, but by 7650 measured fueling is 4% lean and short term fuel trims are adding. If this car was on gasoline I would be concerned, but E85 is such a safe fuel at this power level that even though we see this from time to time, we do not see any engine damage from it. We've actually seen severe lean conditions (.9+ lambda) in one instance while racing at the drag strip, about 5 or 6 passes like this and the spark plugs showed no signs of detonation. In fact the car actually picked up MPH vs running at the target lambda. That happened in July of 2013 and that Stock Coyote engine is still running to this day (even faster into the 9's).</p><p></p><p>[ATTACH=full]669070[/ATTACH]</p><p>[ATTACH=full]669071[/ATTACH]</p><p></p><p>FYI on the above car we did not let it leave AED running like this. I modified the fuel hat and gained another 8-10% fuel volume.</p><p></p><p>My take on this is that E85 even running lean is FAR safer than pump gas on these applications. With a 20+volt BAP and the biggest blower pulley you should be fine, and you can drill out the fuel hat fitting for a little extra room, however it's not a bad idea to save up for a fuel system down the road as you will be at the limit of the fuel system with the stock pump + BAP running the Paxton/Vortech.</p></blockquote><p></p>
[QUOTE="Shaun@AED, post: 15140051, member: 32381"] Normally we do not run out of fuel with the Low boost setups on E85 and a JMS BAP set correctly, but every once in a while we do get a car that runs out of pump. Roughly 10% of the Paxton/Vortech setups we see on E85 with the stock Fuel pump will run out at the top of the RPM band. (We do not see this with TVS, Whipple, or Turbo cars FYI) Here is the last car that ran out of fuel with E85 on my dyno: Notice at 7300 fueling is good, short terms are even pulling a little, but by 7650 measured fueling is 4% lean and short term fuel trims are adding. If this car was on gasoline I would be concerned, but E85 is such a safe fuel at this power level that even though we see this from time to time, we do not see any engine damage from it. We've actually seen severe lean conditions (.9+ lambda) in one instance while racing at the drag strip, about 5 or 6 passes like this and the spark plugs showed no signs of detonation. In fact the car actually picked up MPH vs running at the target lambda. That happened in July of 2013 and that Stock Coyote engine is still running to this day (even faster into the 9's). [ATTACH=full]669070[/ATTACH] [ATTACH=full]669071[/ATTACH] FYI on the above car we did not let it leave AED running like this. I modified the fuel hat and gained another 8-10% fuel volume. My take on this is that E85 even running lean is FAR safer than pump gas on these applications. With a 20+volt BAP and the biggest blower pulley you should be fine, and you can drill out the fuel hat fitting for a little extra room, however it's not a bad idea to save up for a fuel system down the road as you will be at the limit of the fuel system with the stock pump + BAP running the Paxton/Vortech. [/QUOTE]
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