1971 Fuel tank replacement
Thread Starter
Safety Car
Joined: Oct 2021
Posts: 4,186
Likes: 68
From: Iron Range MN
1971 Fuel tank replacement
Would this be the correct replacement for a 71 LS5?
https://www.summitracing.com/parts/s...model/corvette
I've also seen ones that come as a kit with a new sending unit, are these worth purchasing for the "Kit" value?
TIA
https://www.summitracing.com/parts/s...model/corvette
I've also seen ones that come as a kit with a new sending unit, are these worth purchasing for the "Kit" value?
TIA
Melting Slicks
Joined: Sep 2016
Posts: 2,230
Likes: 984
From: Wauconda IL
Race Director
Joined: Mar 2016
Posts: 14,406
Likes: 8,212
From: Napa Valley California
It all depends on how “correct” you want your car to be?
I could be wrong but your oem tank is 18 gallons and not 20 gallons like the Summit tank in your link.
If you plan to ever go with an aftermarket EFI system, now would be the perfect time to put in a tank designed for EFI that will be designed to use an electronic in tank fuel pump when you do the swap.
I went with a new Holley 18 gallon tank stock replacement because I’ll never go to EFI and wanted it to be a direct fit.
Tanks INC are also recommended tanks and have great reviews.
I would replace everything in the tank because you’ll have it empty and out.
I could be wrong but your oem tank is 18 gallons and not 20 gallons like the Summit tank in your link.
If you plan to ever go with an aftermarket EFI system, now would be the perfect time to put in a tank designed for EFI that will be designed to use an electronic in tank fuel pump when you do the swap.
I went with a new Holley 18 gallon tank stock replacement because I’ll never go to EFI and wanted it to be a direct fit.
Tanks INC are also recommended tanks and have great reviews.
I would replace everything in the tank because you’ll have it empty and out.
Thread Starter
Safety Car
Joined: Oct 2021
Posts: 4,186
Likes: 68
From: Iron Range MN
It all depends on how “correct” you want your car to be?
I could be wrong but your oem tank is 18 gallons and not 20 gallons like the Summit tank in your link.
If you plan to ever go with an aftermarket EFI system, now would be the perfect time to put in a tank designed for EFI that will be designed to use an electronic in tank fuel pump when you do the swap.
I went with a new Holley 18 gallon tank stock replacement because I’ll never go to EFI and wanted it to be a direct fit.
Tanks INC are also recommended tanks and have great reviews.
I would replace everything in the tank because you’ll have it empty and out.
I could be wrong but your oem tank is 18 gallons and not 20 gallons like the Summit tank in your link.
If you plan to ever go with an aftermarket EFI system, now would be the perfect time to put in a tank designed for EFI that will be designed to use an electronic in tank fuel pump when you do the swap.
I went with a new Holley 18 gallon tank stock replacement because I’ll never go to EFI and wanted it to be a direct fit.
Tanks INC are also recommended tanks and have great reviews.
I would replace everything in the tank because you’ll have it empty and out.
Very little on the car is original I'd imagine.
Yes, I believe my tank is 18 Gallon
Le Mans Master
Joined: Aug 2005
Posts: 6,541
Likes: 1,975
From: Temple Terrace Florida
I am in the middle of this process with my 68 coupe. Be advised that Quanta is backordered with its tanks. They are awaiting the steel blanks used to make the tanks. They have no delivery date as yet as to when they will be delivered. I ordered mine through ZIP. This was told to me yesterday. Jerry
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Thread Starter
Safety Car
Joined: Oct 2021
Posts: 4,186
Likes: 68
From: Iron Range MN
I've been following the Quanta products page and it looks like they have stock again so i'd like to grab one before they are gone.
Looks like this one might be the one for my 71? Not sure if I have EEC?
https://www.gastanks.com/1970-74-w_E...ctinfo/GM-33D/
Looks like this one might be the one for my 71? Not sure if I have EEC?
https://www.gastanks.com/1970-74-w_E...ctinfo/GM-33D/
1967 Pedal Car Champion
Joined: Mar 2020
Posts: 9,137
Likes: 4,248
From: US-PNW
I've been following the Quanta products page and it looks like they have stock again so i'd like to grab one before they are gone.
Looks like this one might be the one for my 71? Not sure if I have EEC?
https://www.gastanks.com/1970-74-w_E...ctinfo/GM-33D/
Looks like this one might be the one for my 71? Not sure if I have EEC?
https://www.gastanks.com/1970-74-w_E...ctinfo/GM-33D/
Go ahead and buy this tank even if you don't have the system in place because you can cap off the single tank nipple for it if needed. Be aware that if you do cap the nipple, you'll need to have a gas cap that says "Vented"; the gas cap that uses the EEC will say "Sealed".
Thread Starter
Safety Car
Joined: Oct 2021
Posts: 4,186
Likes: 68
From: Iron Range MN
Finally had the new tank installed. I will pick up the Corvette on Tuesday. I had my mechanic install the new tank, toss all old fuel, new fuel filter , and blow out all fuel lines. Looks like it is turning out to be water in the tank, is this somewhat common? My question is how it got there. Was it just a bad tank fill at one point? Can water enter from where the gas cap is? How did it get there?
I use non-oxy when available, is it wise to put a fuel treatment in with each fill up?
I use non-oxy when available, is it wise to put a fuel treatment in with each fill up?
Melting Slicks
Joined: Sep 2016
Posts: 2,230
Likes: 984
From: Wauconda IL
Condensation happens when the temperature changes. The air inside the gas tank expands and contracts, creating moisture. Over time, this moisture can build up and eventually turn into water droplets.You can use a bottle of HEET every other fill up to mitigate the water.
Melting Slicks
Joined: Mar 2005
Posts: 2,095
Likes: 299
From: Midlothian VA
Finally had the new tank installed. I will pick up the Corvette on Tuesday. I had my mechanic install the new tank, toss all old fuel, new fuel filter , and blow out all fuel lines. Looks like it is turning out to be water in the tank, is this somewhat common? My question is how it got there. Was it just a bad tank fill at one point? Can water enter from where the gas cap is? How did it get there?
I use non-oxy when available, is it wise to put a fuel treatment in with each fill up?
I use non-oxy when available, is it wise to put a fuel treatment in with each fill up?
If that drain hose is clogged rain (or water from washing the car) can then backup around the filler neck and enter the tank should your gas cap not seal completely.
You can test this by simply pouring some water into the rubber boot surrounding the filler neck and see that it actually drains.
Instructor
Joined: Aug 2017
Posts: 115
Likes: 15
From: Lebanon Ohio
Got a comment and a question.
first, I got water in my tank once purely from what I believe was a couple of extremely warm humid late winter days with rain, and my whole garage was so wet you would thought I had sprayed it with a water hose. Took it several days to dry out. The car was in the garage with barely a quarter tank of fuel and later had such trouble with a stumble and misfire it took forever to find it. The cure turned out to be adding two or three cans ofso-called dry gas alcohol water treatment eliminator stuff.
Now my question… I believe unleaded gas nozzles were introduced in early 70s, but my gas filler is a large opening. You could probably drop a tennis ball down through. Did any of those fillers have the nozzle restrictor in 1971?
first, I got water in my tank once purely from what I believe was a couple of extremely warm humid late winter days with rain, and my whole garage was so wet you would thought I had sprayed it with a water hose. Took it several days to dry out. The car was in the garage with barely a quarter tank of fuel and later had such trouble with a stumble and misfire it took forever to find it. The cure turned out to be adding two or three cans ofso-called dry gas alcohol water treatment eliminator stuff.
Now my question… I believe unleaded gas nozzles were introduced in early 70s, but my gas filler is a large opening. You could probably drop a tennis ball down through. Did any of those fillers have the nozzle restrictor in 1971?
Melting Slicks
Joined: Sep 2016
Posts: 2,230
Likes: 984
From: Wauconda IL