fuel tank plumbing questions - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wibilly · 06-26-2006, 11:24 AM

i replaced the tank in my 71 with a 40 tank from a 87 sub. i removed the electric pump and extended the pickup tube. the sub tand has a vent with a ckeck valve that alows fuems to escape but no air tho enter the tank that went to the evaperative canister whitch my truck didn't have , what should i do with this? add canister? plug it and use vented cap? next ? tank is also plumbed for a return line my holly fuel pump is not should i plumb this to front of truck in case i want it later or plug it at tank? next ? where these tanks get their make up air? dotheir caps alow air to enter and fuems to not escape to keep them from collapsing or vapor locking?

wibilly · 06-27-2006, 09:29 AM

no thoughts on this?

wibilly · 06-27-2006, 11:42 PM

62 veiws and not even a guess

TugOwar · 06-28-2006, 06:27 AM

Man I hate to see threads like this. Let me take an uneducated stab at this.

Since the tank going in a 70 then I say set it up like a 70 tank, no return line and a vented cap. My 2 cents

wibilly · 06-28-2006, 10:02 AM

thanks tugowar thats what i did yesterday just ran the 3/8 line to front and stubbed other two out where they were accesable and caped return

**Already Gone** · 06-29-2006, 01:53 AM

Quote:

Originally Posted by wibilly

i replaced the tank in my 71 with a 40 tank from a 87 sub. i removed the electric pump and extended the pickup tube. the sub tand has a vent with a ckeck valve that alows fuems to escape but no air tho enter the tank that went to the evaperative canister whitch my truck didn't have , what should i do with this? add canister? plug it and use vented cap? next ? tank is also plumbed for a return line my holly fuel pump is not should i plumb this to front of truck in case i want it later or plug it at tank? next ? where these tanks get their make up air? dotheir caps alow air to enter and fuems to not escape to keep them from collapsing or vapor locking?

Those 40 gal Burb tanks are huge and I would have never thought one would fit a 1/2 ton. If possible could you post some pics of the tank on your truck..

wibilly · 06-29-2006, 10:27 AM

my truck is a shortened 3/4 4wd. the rear frame crosmember was damaged so it was removed and i rebuilt around the tank.i had to add two "back on the rear of the frame but only two" high to clear the rear bed cross member and keep tank far enough rearward to clear the diff under suspension load

06-26-2006, 11:24 AM	#1
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	fuel tank plumbing questions i replaced the tank in my 71 with a 40 tank from a 87 sub. i removed the electric pump and extended the pickup tube. the sub tand has a vent with a ckeck valve that alows fuems to escape but no air tho enter the tank that went to the evaperative canister whitch my truck didn't have , what should i do with this? add canister? plug it and use vented cap? next ? tank is also plumbed for a return line my holly fuel pump is not should i plumb this to front of truck in case i want it later or plug it at tank? next ? where these tanks get their make up air? dotheir caps alow air to enter and fuems to not escape to keep them from collapsing or vapor locking? __________________ common sense isn't so common anymore

06-27-2006, 09:29 AM	#2
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: fuel tank plumbing questions no thoughts on this? __________________ common sense isn't so common anymore

06-27-2006, 11:42 PM	#3
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: fuel tank plumbing questions 62 veiws and not even a guess __________________ common sense isn't so common anymore

06-28-2006, 06:27 AM	#4
TugOwar Registered User Join Date: Sep 2004 Location: Pleasanton, TX Posts: 1,723	Re: fuel tank plumbing questions Man I hate to see threads like this. Let me take an uneducated stab at this. Since the tank going in a 70 then I say set it up like a 70 tank, no return line and a vented cap. My 2 cents

06-28-2006, 10:02 AM	#5
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: fuel tank plumbing questions thanks tugowar thats what i did yesterday just ran the 3/8 line to front and stubbed other two out where they were accesable and caped return __________________ common sense isn't so common anymore

06-29-2006, 10:27 AM	#7
wibilly Senior Member Join Date: Nov 2005 Location: northwestern wi Posts: 2,111	Re: fuel tank plumbing questions my truck is a shortened 3/4 4wd. the rear frame crosmember was damaged so it was removed and i rebuilt around the tank.i had to add two "back on the rear of the frame but only two" high to clear the rear bed cross member and keep tank far enough rearward to clear the diff under suspension load __________________ common sense isn't so common anymore Last edited by wibilly; 06-29-2006 at 10:45 AM.



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