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I've seen a lot of ppl say that an upgraded fuel pump is needed to run e85, but I think some people don't understand why...
The reason is that e85 is less fuel efficient. Meaning you need to pump more fuel into the engine to produce the same power. This is the only reason you need an upgraded pump to run e85.
I guess technically you can use the stock pump for e85, but you'd have to re-tune. Which would probably make less power. Since e85 is 20-30% less fuel efficient, I guess you'd make 20-30% less power. But e85 is also much less resistant to knock and run cooler, so i dunno. Maybe 10-20% less power than stock. I dunno. Would be interesting to see what the OEM pump can do w/ e85.
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