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  #1  
Old 09-24-2010, 11:32 AM
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Wheels4 Wheels4 is offline
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question about fabricated gas tank....

i'm working on a project that calls for a custom gas tank... I believe i can build the gas tank without issues. my question is... what do i do about the inside of the tank once it is built?? do i pour something in there to coat it? or do i leave it bare?

any help would be appreciated.


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Old 09-24-2010, 11:54 AM
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Quote:
Originally Posted by Wheels4 View Post
i'm working on a project that calls for a custom gas tank... I believe i can build the gas tank without issues. my question is... what do i do about the inside of the tank once it is built?? do i pour something in there to coat it? or do i leave it bare?

any help would be appreciated.


Up till a few years ago I would have said leave it.
The addition of 10%-Ethanol to virtually all gasoline is forcing me to change this position. With the EPA seriously thinking about increasing exhaust emissions (indeed total emissions as well as Carbon Footprint) with an increase of Ethanol to a 15% level I am concerned that common Gas from the pump will destroy virtually everything in a Gasoline system including the tanks.
I do not know at this point what coating I would use; YET.
At this point I would be looking for something that is 100% comparable with "Alcohol" AND Gasoline!
In the interim I think I would look at one of the low cost Plastic tanks currently available and I would fab the metal can as I feel the Cans on the market are way to flimsy...

Sorry not much help there.
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Old 09-24-2010, 12:02 PM
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What material are you going to construct the gas tank out of?

Mike
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Old 09-24-2010, 12:09 PM
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ferociousllama ferociousllama is offline
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Eastwood has a "gas tank restoration kit" It comes with a cleaner, chemical dryer, and sealer. The sealer is designed to seal up any pinholes. If you're making your own tank it's worth it to buy the kit for just the sealer. It's not expensive from what I recall.
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Old 09-24-2010, 12:26 PM
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Originally Posted by ferociousllama View Post
Eastwood has a "gas tank restoration kit" It comes with a cleaner, chemical dryer, and sealer. The sealer is designed to seal up any pinholes. If you're making your own tank it's worth it to buy the kit for just the sealer. It's not expensive from what I recall.
I have used this product 25 years ago.
Is it clearly labeled for Alcohol use?
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Old 09-24-2010, 12:40 PM
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Geo... i'm building the tank out of sheet metal.

Entropy, if i could find a plastic tank for this application.. i would jump all over it.

llama, i appreciate it... i'll look it up.
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Old 09-24-2010, 04:02 PM
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Quote:
Originally Posted by Wheels4 View Post
Geo... i'm building the tank out of sheet metal.

Entropy, if i could find a plastic tank for this application.. i would jump all over it.

llama, i appreciate it... i'll look it up.
Do nothing other than clean the debris that flakes off from welding. Im on my 3rd home built tank. Somewhere i have pics of the inside of the first one. It was in service for 5 years and not a spot of rust.
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Old 09-24-2010, 04:26 PM
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Shaggy, how much use is that gas tank seeing(the one in service for 5yrs)? this is for something that will more than likely sit alot longer that it is ever used.
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Old 09-24-2010, 06:41 PM
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Quote:
Originally Posted by entropy View Post
I have used this product 25 years ago.
Is it clearly labeled for Alcohol use?
No. It only says not to use with nitro methane and aniline oils. I think it'd be ok with ally because it's being sold today and gas is about 10 percent ethanol. The sealer can be removed with acetone.
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Old 09-24-2010, 07:01 PM
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Not knowing your budget. You could have a bladder made for your tank, with or without foam. Most fuel cell makers offer custom builds to you dimensions, check out Aerotech. Or KBS coatings has a great sealer kit applied to the interior tank surface if you want to go that route. F>Y>I. I personally coat all of my tanks whatever the material maybe, always a good precaution. No body wants to blow up. :)

My 2 Pennies.
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Old 09-24-2010, 08:37 PM
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Quote:
Originally Posted by Wheels4 View Post
Shaggy, how much use is that gas tank seeing(the one in service for 5yrs)? this is for something that will more than likely sit alot longer that it is ever used.
It's on my buggy, so its only used on the weekends. sometimes it would sit for a few weeks at a time. Not sure how that compares to your usage.

If it sits for too long it will rust eventually. Think about this. I just borrowed a 5 gal jerry can from a guy to use. Its old military. Hardly any rust at all. How much does that get used.
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Old 09-24-2010, 09:42 PM
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In late '80, I had an antique vehicle fuel tank that was a perforated mess.A process called "Renu" http://www.gastankrenu.com/index.htm was applied, the tank still looks great today and has a lifetime warranty. The process is compatible with methanol and ethanol.
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Old 09-25-2010, 02:49 AM
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Build tank outta stainless. When I added up coating cost, materials and my time (its not free no matter what you think!), I found that the stainless was the same price. If you can weld it that is.
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Old 09-25-2010, 11:39 AM
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some good info shared, thanks fellas... The project i'm working on is somewhat small, so the tank would only be a gallon in volume.

Cheevy, I'm trying to keep the cost within reason...

shaggy, if you're a member over on minibuggy.net... you might have seen my build thread. as far as usage... when camping and when my buddies come over for a beer.


79Cherokee, thanks for that link...

Driveshaft, I MIG(flux core)... so, i'd rather not go with stainless.

Last edited by Wheels4; 09-25-2010 at 11:43 AM.
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  #15  
Old 09-25-2010, 01:29 PM
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Quote:
Originally Posted by Wheels4 View Post
some good info shared, thanks fellas... The project i'm working on is somewhat small, so the tank would only be a gallon in volume.

Cheevy, I'm trying to keep the cost within reason...

shaggy, if you're a member over on minibuggy.net... you might have seen my build thread. as far as usage... when camping and when my buddies come over for a beer.


79Cherokee, thanks for that link...

Driveshaft, I MIG(flux core)... so, i'd rather not go with stainless.
Oh, I have to...
There is a huge selection of plastic tanks in that size, they are called "Gas Cans". Put one in a sheet metal box and done.
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Old 09-26-2010, 12:53 AM
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that would kill the 'cool factor'.


always one in the bunch...
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  #17  
Old 09-27-2010, 11:23 AM
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go take it to a chromer and just have them nickel it. That is what most bike guys do.
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  #18  
Old 09-27-2010, 11:32 AM
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Originally Posted by the stripping shop View Post
go take it to a chromer and just have them nickel it. That is what most bike guys do.
didn't know that... thanks for the info.
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Old 09-27-2010, 04:52 PM
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I have virtually nothing to add to this thread except to say thanks for the info; I am learning from it and I hope people continue to respond!
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  #20  
Old 09-27-2010, 11:36 PM
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I have about as much faith in "end-user" applied coatings as I do in my government, they will make me feel good until I discover the lie and then they will laugh.
In the USA I will choose to fabricate my tanks out of 300 Series Stainless from this point on. Who knows what they will put in our fuel next
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