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 Post subject: Aluminum fuel tank Liner
PostPosted: July 17, 2017, 5:10 pm 
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Joined: August 8, 2014, 6:08 pm
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Location: Green Bay, WI
I have all E-85 Compatibility with this car so far Pump, rebuild on the injectors, lines. I did for connivance sake, possible turbo later. So far it hasn't really cost anything to do it. SO whats your favorite liner where I don't have to worry about it coming off?.

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PostPosted: July 17, 2017, 6:41 pm 
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Joined: April 23, 2006, 8:26 pm
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Well without more information I'd recommend a stainless tank and no liner.

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PostPosted: July 17, 2017, 8:45 pm 
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KB58 wrote:
Well without more information I'd recommend a stainless tank and no liner.

What kind of information are you looking for. Stainless is way too heavy.

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PostPosted: July 17, 2017, 9:49 pm 
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The tank material is not a problem, Steel, Aluminum est. The problem comes when water is absorbed by the e85. It will create acids that can corrode soft metals. The best thing to do when storing the vehicle for long periods of time is to leave it full or empty to avoid water buildup.

I have had E85 sit in an aluminum fuel cell for months to a year and had no ill effects on the tank.

Be sure however to keep an eye on your filters as e85 is a solvent and if you have had gasoline in your tank the varnish it leaves behind will be stripped off and clog your filter. But since your system is probably new i see no issues.
See PDF link below for more Info.

E85 Materials Compatibility - Innovative Motor Sports

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PostPosted: July 17, 2017, 10:12 pm 
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stuie84 wrote:
The tank material is not a problem, Steel, Aluminum est. The problem comes when water is absorbed by the e85. It will create acids that can corrode soft metals. The best thing to do when storing the vehicle for long periods of time is to leave it full or empty to avoid water buildup.

I have had E85 sit in an aluminum fuel cell for months to a year and had no ill effects on the tank.

Be sure however to keep an eye on your filters as e85 is a solvent and if you have had gasoline in your tank the varnish it leaves behind will be stripped off and clog your filter. But since your system is probably new i see no issues.
See PDF link below for more Info.

E85 Materials Compatibility - Innovative Motor Sports

I am aware of the acid forming that's what lead me to look at lining the tank. Never thought of varnish coming off and being a problem. Good to know. This system hasn't been used yet. Maybe I'll scrap the idea and just maintain the system at the end of the driving season.

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PostPosted: July 17, 2017, 10:16 pm 
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Joined: September 15, 2014, 8:13 pm
Posts: 149
Weeelllll...

Ethanol isn't and won't become an acid, but microbes in ethanol containing gas do create acids which can eat at an Al tank. I have no idea what conditions allow those microbes to grow. Maybe it is high water content (I read that they are happy at a water interface, but water and ethanol are miscible, so I'm not sure what to make of that). Anyway, no problem with stainless, apparently.

I'd take up the solvent issue, but there's not much point. Every solvent dissolves different things. Water dissolves the most (thus its description as the universal solvent), but for certain, ethanol dissolves different stuff than hydrocarbons. Whether you get clogs from redissolved varnish or gels from rubber won't matter to you, you'll still have issues. My recommendation is to get fuel lines and tanks specified for the type of fuel you will be using and you should be fine.

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PostPosted: July 18, 2017, 1:33 am 
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This is just for laughs. I love cryptic posts, at least for this feeble flea brain auto/NG comp mechanic of 35 years. It's like a puzzle

I realize the question was "I have set up my fuel system for ethanol/gas use, do I need to worry about lining my fuel cell/gas tank because of this?

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