Gorske

After being tuned for 93 octane I made the switch to e85. Seeing if anyone 5.3 or 4.3 has done the same and what kind of actual hp/tq difference they have had and track time improvements they have seen. Just seeing if for example with my truck stock 285hp/305tq jumps to 297hp/330tq on e85 if that same 12hp/25tq gain will happen when running e85 being I'm already tuned for 93 octane and I had a significant hp/tq gain from that. Other then the mpg change which I knew would happen it seems to get up to speed smoother. I will get a data log soon with it and let you know what I see hp/tq wise and track numbers once I go.

Noah Burns

iTrader: (5)

Not really sure what you are asking, your post was kind of confusing.

E85 will make more power over 93, if you have it tuned for E85 probably even more. My truck on E85 is a huge night and day difference to regular fuel, plus since I have the ORY on there it doesn't put off the gas fumes, it's a less harsh smell that doesn't burn the eyes etc.

RoadKill03

My 2014 5.3 GMC went 13.7 with just a E85 tune. Had never opened the hood on truck. The only other thing done to truck was drop kit and when with 315/35R20 on rear tires. Ran the 13.7 spinning so had to ease in to it.