E85 seems to be the. Pump gas octane varies in the us by both grade and state.
2019 Gt350 Dyno Stock Vs 93 Tune Vs E85 Tune
E85 vs 93 octane. How much hp gain from 93 to e85 lets find out on the dyno. In colorado those numbers are knocked down by 2 points to 85 and 91 octane. Here are the results for the pump e85 versus 93 octane pump gas. Pump e85 was a killer fuel after tuning as it made a solid 618 rear wheel horsepower on our mustang dynamometer soundly defeating our baseline fuel of pump 93 octane gasoline at 574 rear wheel horsepower. E85 vs 93 octane pump fuel dyno results. Here in illinois the octane of regular and premium gasoline is usually 87 and 93 respectively.
Right off the bat any contest between 112 octane e85 and premium unleaded pump gas 91 or 93 octane would be no comparison. The oil filter on the left is from my hellcat running nothing but e85 3500 miles since the last oil change. The fuel economy of our tahoe on e85 under these conditions was 265 percent worse than it was on gas. But thats pure ethanol not e85. The filter on the right is from my wifes hellcat running 93 octane gasoline 4000 miles since the last oil change. Ethanol has an octane rating of about 1086 which is only 010 octane lower than the methanol once commonly used in racing circles.
E85 does such a good job knocking down inlet air temps that no intercooler is needed. Stock vs 93 vs e85 with long tube headers on the 93 e85 dyno results. W2w tests its pump gas engines on 100 octane for safetys sake then performs its final validations with 93 octane pump fuel with no other changes except in the software calibrations on e85. The e85 offers more power even before we get into the added ability. Yes hers has 500 more miles on the oil change than mine but that wont make this much of a difference in what you see here. Despite the flex fuels higher octane rating 103 in this case.
While mixing 85 percent 108 octane ethanol with 15 percent 93 octane would yield something in the 102 octane range the fact is that most manufacturers mix it with 84 octane or lower.
Gallery of E85 Vs 93 Octane
