Making a NEW fuel Tank
#1
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Making a NEW fuel Tank
I have had a lot of issues with Fuel going bad and the metal tank rusting. Ethanol is the devil. I think water gets absorbed but the alcohol in the fuel. Collects in tank and Wala, rust. I have seen it with my S-10 and other vehicles through the years. I plan to build a replacement out of Fiberglass with Vinyl Ester Resin. Evidently this resin is used for boat in floor tanks and it is chemical resistant. I am also going to rewire the fuel pump circuits. The power and ground supply routing are criminal. I welcome any advice and suggests, it's all food for thought. If any one is interested I plan on posting progress.
#2
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Car: 90 Formula / T-tops
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Re: Making a NEW fuel Tank
I noticed Hawks is selling a fuel tank now, calling it a reproduction- not sure what that means. https://www.hawksmotorsports.com/198...ion-14-gallon/
https://www.hawksmotorsports.com/198...ion-14-gallon/
You could also use a plastic 4th gen tank, a lot of guys do around here. I've been studying how to get the EVAP system working from 4th gens, shouldn't be a problem.
Fuel tanks require headroom and need to be able to expand and vent. should be into the EVAP system, but as a fail safe, to atmosphere. If you are really determined to get rid of metal, I'd go the 4th gen route.
https://www.hawksmotorsports.com/198...ion-14-gallon/
You could also use a plastic 4th gen tank, a lot of guys do around here. I've been studying how to get the EVAP system working from 4th gens, shouldn't be a problem.
Fuel tanks require headroom and need to be able to expand and vent. should be into the EVAP system, but as a fail safe, to atmosphere. If you are really determined to get rid of metal, I'd go the 4th gen route.
Last edited by LiquidBlue; 12-22-2021 at 09:44 AM.
The following 2 users liked this post by LiquidBlue:
afgun (12-24-2021), dennisbernal91z (01-04-2022)
#3
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Re: Making a NEW fuel Tank
I noticed Hawks is selling a fuel tank now, calling it a reproduction- not sure what that means. https://www.hawksmotorsports.com/198...ion-14-gallon/
https://www.hawksmotorsports.com/198...ion-14-gallon/
You could also use a plastic 4th gen tank, a lot of guys do around here. I've been studying how to get the EVAP system working from 4th gens, shouldn't be a problem.
Fuel tanks require headroom and need to be able to expand and vent. should be into the EVAP system, but as a fail safe, to atmosphere. If you are really determined to get rid of metal, I'd go the 4th gen route.
https://www.hawksmotorsports.com/198...ion-14-gallon/
You could also use a plastic 4th gen tank, a lot of guys do around here. I've been studying how to get the EVAP system working from 4th gens, shouldn't be a problem.
Fuel tanks require headroom and need to be able to expand and vent. should be into the EVAP system, but as a fail safe, to atmosphere. If you are really determined to get rid of metal, I'd go the 4th gen route.
I just vented it to the atmosphere.
-- Joe
#4
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Re: Making a NEW fuel Tank
I also have swapped Fourth-Gen Tanks into many Third-Gen Cars.
The Pump and Sending-Unit/ Tank-Unit Options are great!
Note: I do not know how many of you are familiar with EVAP Systems, like a Stock Fourth-Gen would use...
But ignoring the purely Emissions aspects... The Fuel Tank needs to have access to Open-Air.
As Fuel leaves the Tank, Air needs to take the place of the Fuel... or the Tank will be under a strong Vacuum (almost like imploding)...
and cause issues with Fuel Delivery.
If any of you have worked on EVAP Systems, you would have noticed that the Fuel Tank Pressure Sensor reads in Negative values as well as Positive.
The EVAP System prevents the Fuel Tank from being under too much of a Vacuum.
The Pump and Sending-Unit/ Tank-Unit Options are great!
Note: I do not know how many of you are familiar with EVAP Systems, like a Stock Fourth-Gen would use...
But ignoring the purely Emissions aspects... The Fuel Tank needs to have access to Open-Air.
As Fuel leaves the Tank, Air needs to take the place of the Fuel... or the Tank will be under a strong Vacuum (almost like imploding)...
and cause issues with Fuel Delivery.
If any of you have worked on EVAP Systems, you would have noticed that the Fuel Tank Pressure Sensor reads in Negative values as well as Positive.
The EVAP System prevents the Fuel Tank from being under too much of a Vacuum.
#5
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Car: 90 Formula / T-tops
Engine: 305 TPI
Transmission: MD8
Re: Making a NEW fuel Tank
As Fuel leaves the Tank, Air needs to take the place of the Fuel... or the Tank will be under a strong Vacuum (almost like imploding)...
and cause issues with Fuel Delivery.
If any of you have worked on EVAP Systems, you would have noticed that the Fuel Tank Pressure Sensor reads in Negative values as well as Positive.
The EVAP System prevents the Fuel Tank from being under too much of a Vacuum.
and cause issues with Fuel Delivery.
If any of you have worked on EVAP Systems, you would have noticed that the Fuel Tank Pressure Sensor reads in Negative values as well as Positive.
The EVAP System prevents the Fuel Tank from being under too much of a Vacuum.
The only other thing I can think of, is it would be the fuel return line, keeping the pressure somewhat even.
Last edited by LiquidBlue; 12-22-2021 at 08:05 PM.
#6
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Car: 90 Formula / T-tops
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Re: Making a NEW fuel Tank
woke up in the middle of the night, recalling that the fuel tank vent valve is a 2-way valve, maybe my dreams answered my own question
#7
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Re: Making a NEW fuel Tank
All the reproduction tanks are too small. 14 gallons is smaller than many of the original tanks. I would see if you could get at least 16 gallons in your design.
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#8
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Re: Making a NEW fuel Tank
LOL, Small!
My 87 Camaro came with a 12 Gal. Tank.
My 87 Camaro came with a 12 Gal. Tank.
#10
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Re: Making a NEW fuel Tank
I must have missed something. I read about this 4th gen swap. I started looking around (online) and found metal tanks. Perhaps I need to look deeper it to this. It's not the first time getting tripped up. This is why I posted this topics. I may have new options.
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Re: Making a NEW fuel Tank
The LS plastic tanks are 16.8 gal. With the removable fill tube this is a worthy upgrade
#14
Junior Member
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Re: Making a NEW fuel Tank
LS it is. I will look into this. Thanks guys, This is great info. Happy New Year everyone
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