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if running E-85 and not running your car for a month or two. will e-85 go bad and or start eating parts? rubber lines, gaskets?

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It will go bad... it will absorb water... water is what
hurts the carb(that causes corrosion on the bare alum
parts)... wont bother rubber like meth... alot of
the carb place put a different gasket on them but
I dont know if its the gasket issue or hole sizes
are different... I have left it in my carb over the
winter and did see a little corrosion the second
year so now I run gas in the system for the winter

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As long as you have a good sealed fuel system that will not allow moisture you are fine. I never draind the bowls in my carb all season and never saw a problem. Took the carb apart at the end of the season to fix a leak and all looked brand new. My friend who runs one of my carbs left fuel in his all summer and winter and brought the carb over to me to look at, and looked like the day I put it together.

I would not worry about it on a week over week basis like Methanol but I would drain it over the winter. I used to do it on race gas too. If you do leave it in I would at least fire the car and warm it once a month while being stored if you can.

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100% Agree Had no problems this winter, started up 2 weeks ago with help from a drizzle of regular gas then switched over to the E85 in the fuel cell. I did put E85 fuel additive in the fuel cell and ran the motor to get it in the carb.

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As long as you have a good sealed fuel system that will not allow moisture you are fine. I never draind the bowls in my carb all season and never saw a problem. Took the carb apart at the end of the season to fix a leak and all looked brand new. My friend who runs one of my carbs left fuel in his all summer and winter and brought the carb over to me to look at, and looked like the day I put it together.

I would not worry about it on a week over week basis like Methanol but I would drain it over the winter. I used to do it on race gas too. If you do leave it in I would at least fire the car and warm it once a month while being stored if you can.

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You have 2 vents on the carb and a vent on the tank...
how can you have a good sealed system

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According to Popular Mechanix article on E15 - E85 it can go bad in less than a month or last for a year it all depends on the temp, humidity, and luck, and there is no additive currently on the market that wiil prevent it. Its why everybodys weed eater, chain saw, lawn mower, etc are having their carbs trashed over winter. Pop Mech article.

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The only way to keep it for prolonged periods of time
is to keep it in sealed drums... we got it in steel
drums at work and I would store it for over a year
until I/we needed it for testing.... I store it here
in the pole barn for 5 months(over the fall and winter)
in steel drums

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There's gotta be someway to store it r the filling stations would be having a fit, however, there has been some cases of people fillin up at a station and it killin their car. Coincidence?

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Filling stations have vents also but they use smaller
tanks(usually 2000 to 5000 gal tanks) but they move
the fuel quick enough so it doesnt sit around in the
tank... a production car has a sealed system(injected)
and has a vent/vac cap and a shut off on the vent
(all for emissions)... the cap can allow enough vac
or pressure to move but the vent opens for normal
driving
Also the stations are SUPPOSE to check their tanks
for water on a regular basis

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My experience from several years ago...

edit: the pic is from last summer when I finally pulled the carb apart to see why is was running like an edelbrock 750.

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The anodized metering block do help... wish I could
get the whole thing anodized

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According to Popular Mechanix article on E15 - E85 it can go bad in less than a month or last for a year it all depends on the temp, humidity, and luck, and there is no additive currently on the market that wiil prevent it. Its why everybodys weed eater, chain saw, lawn mower, etc are having their carbs trashed over winter. Pop Mech article.

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In my situation I was running E-85 for the summer and ran a tank or two of 110 Sunoco through the car before storing it for three years. I have seen power valves that sat in empty carbs rust a little but never corrode like the picture shows.

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The thing with your PV... that corrosion is not on
the fuel side... I dont know what was attacking them
other than moisture

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It was FULL of corrosion in the well...way worse than the outside. I'll see if I have any more pics of the blocks after I pulled the power valves. Hard to say...

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you could have have fuel slosh over the vent at the
top... that goes into the bowl but I thought the gasket
sealed off that PV chamber(could be wrong) and if there
was fuel laying in there it would absorb water
EDIT
thats the same place I had some(no PV)