Hey Scotty,
I own a Honda Civic 2017 hatchback with 56,000 miles on it with aftermarket parts:
-PRL CAI
-Catless Downpipe
-PRL Flex Fuel
-Hondata Flashpro flashed with +9psi flex fuel
I recently had my engine blown out. Crankshaft and piston rods blew into pieces and oiled leaked everywhere. I'm guessing its due to pumping e85 fuel. People say its due to not having the proper aftermarket parts such as fuel pump, fuel line, fuel injectors, and weak piston rods thats not compatible with e85 and with the HP I was running but I want to hear from a mechanic like yourself.
Using E85 was a big mistake with that much boost, and you probably were running too much boost for your engine as well! You definitely blew the engine from pre-ignition, which basically happens from running too lean. E85 burns more completely compared to normal gasoline, and so when it pre-ignites it does serious damage on the internals. You didn't necessarily need an upgraded fuel system, nor was the engine weak either. You just over-tuned the engine to the point where it started pre-igniting and eventually led to blowing up.
This is a perfect example of what happens when you don't know how to safely tune your engine. You can't just flash a tune and crank it up to the max settings thinking everything will work properly. You have to start off on the lowest settings and data log to see if everything is working properly. Only then can you start slowly turning it up while continuously datalogging. You also need to understand how much extra power your engine and tranny can handle "safely" before internals need to be upgraded. If a tune calls for any recommended mods, those need to be installed first before the tune can be flashed. I think you just got greedy with the tune...you didn't play it safe at all.
@mod_man needs to see this. He's a better expert on modifications than me.
Sounds pretty legit to much air and not enough fuel combined with a bottom end not built for that much boost.
