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| 2004 to 2008 F-150 and Mark-LT 4.2L, 4.6L and 5.4L equipped F-150s and Mark-LTs |
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#1
Mon, August 31st, 2009, 07:45 AM
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E85 & Gasoline
Can someone tell me the difference between E85 and Gasoline??? I currently have a custom tune for 89 Performances. Is it better to get a custom tune for E85??? Thanks in advance....
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#2
Mon, August 31st, 2009, 04:34 PM
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You HAVE to get a custom tune for E85. Running E85 in a vehicle that cannot compensate for the MANDATORY decrease in air/fuel ratio will cause codes (P0171/P0174), lack of power (more than you'll lose just going to E85 with dedicated tuning), and driveability concerns.
E85 has a stoichiometric ratio of around 9.6:1. Gasoline's stoich ratio is 14.7:1. The engine control module is only able to compensate so much for a perceived lean condition. It takes A LOT more E85 per unit of air to maintain happy operation than with gasoline parameters. Is there any particular reason that you are wanting to run E85?
__________________
Tuning, flashing, burning chips, and repairing all aspects of 7.3L Powerstrokes. SEVEN 7.3L-powered vehicles in the driveway. Two didn't come that way from the factory!
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#3
Mon, August 31st, 2009, 04:57 PM
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Thanks, there is no particular reason i was just wondering what was the difference.
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Linear Mode
