# e85 and carb

**URL:** https://forums.speedlife.net/t/e85-and-carb/193333
**Category:** PittSpeed Automotive
**Created:** [October 28, 2007, 1:47pm UTC](https://forums.speedlife.net/t/e85-and-carb/193333 "2007-10-28T13:47:30Z")
**Posts on this page:** 1
**Showing post:** 13

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### Author: ![69camaro](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/69camaro/32/6046_2.png) [@69camaro](https://forums.speedlife.net/u/69camaro)
#### Post date: [October 29, 2007, 10:51am UTC](https://forums.speedlife.net/t/e85-and-carb/193333/13 "2007-10-29T10:51:29Z")

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> [@FS: Sunroof](https://forums.speedlife.net/t/fs-sunroof/32895/15):
>
> E85 may have a higher octane rating, but it also provides less power than 87 octane gas. Meaning, not only do you have less horses to play with, but your mileage will suffer.
> 
> Also, the ethanol is much more corrosive to rubber/plastic parts in the fuel delivery system. Flex-fuel vehicles have different compounds to those parts, which resist the corrosive effect.
> 
> It’s also no cheaper than regular ol’ 87, if you can find it.
> 
> Let’s see…less power, worse mileage, bad for the engine, and I don’t save anything…what a winning combination.

it doesnt really lower horsepower, it has a lower energy content than gas which you have to run richer which makes your mpg suffer. but if you build a high compression motor or a boosted motor you can take advantage of its cooling effect and higher octain which will make much more power than any pump gas for a fraction of the price of race gas

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