thats just supposed to be from going from pump to e85 ? Thats a hudge difference i find that hard to beleive but your compression should be over 12.1 with what you have or real close to it maybe thats why. So the only thing change between both pulls is the type of gas ? And was it tunned on both gases or did you just do a pull on pump gas with the e85 tune? Im not nocking it at all just wondering what the hatch would on e85 a ten horse power gain would be well above 260 that would be nice and might make a high 11 second pass that im looking for out the dd.