# 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:** 22

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**Author:** ![beat90tsi](https://avatars.discourse-cdn.com/v4/letter/b/43a26b/32.png) [@beat90tsi](https://forums.speedlife.net/u/beat90tsi)\
**Post date:** [October 29, 2007, 8:47pm UTC](https://forums.speedlife.net/t/e85-and-carb/193333/22 "2007-10-29T20:47:44Z")

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> [@The Unofficial "make fun of skunk" thread](https://forums.speedlife.net/t/the-unofficial-make-fun-of-skunk-thread/31341/69):
>
> do you need to run race fuel? if you car will run on 87, race or e85 fuel will do nothing for your motor. You may pick up a very few hp because you can advance your timing a little more but its not worth it. I am assuming you have a naturally asperated motor and unless your compression is around  
> 12:1 there is no need for e85 or race gas. the only reason the flex fuel cars are around is because alcohol burns cleaner and is better for the air. e85 is 85% ethenol 15% gasoline

I can run my DSM on any octane, but I can run a hell of a lot more boost on E85 than I can on 93. It cools the intake charge with more fuel and bumps me to 100 octane. No real downside except the reduced mileage, but that’s a small price to pay to run a racegas tune on a DD.

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