Questions for under bed gas tank guys.... - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Strut · 01-31-2010, 09:52 PM

Here is mine:

Hope it helps....

SCOTI · 01-31-2010, 10:27 PM

Quote:

Originally Posted by Strut

Here is mine:

Hope it helps....

This is the direction I'll go if I route a straight pipe up from the tank inlet. What did your 'hinge' come off of?

SCOTI · 02-01-2010, 11:05 AM

ttt

Strut · 02-01-2010, 01:47 PM

Quote:

Originally Posted by SCOTI

This is the direction I'll go if I route a straight pipe up from the tank inlet. What did your 'hinge' come off of?

It came off a late model Dodge truck I think.... it was an extra just layin around the shop, so I cut it up and used it. I think that anyone will work.....

OJ1988 · 02-01-2010, 02:23 PM

Strut, what size fuel cell, and how low does it hang?

SCOTI · 02-01-2010, 02:38 PM

Quote:

Originally Posted by Strut

It came off a late model Dodge truck I think.... it was an extra just layin around the shop, so I cut it up and used it. I think that anyone will work.....

I figured as much but thought it would be good info to know regardless. I have an old license plate flip bracket I was going to use. They're spring loaded to close & have a ratchet position to stay open as well.

Rollie396 · 02-01-2010, 02:53 PM

FWIW I had an old one ton with a deck on it,that would not take fuel.I found out that if I drove up on a 4x4 block so the fuel fill side was higher,it would take fuel without any trouble.I don't imagine you want to be doing that everytime you fill up,but it does suggest the problem is in the angle moreso than the size of pipe.

redbaron69 · 02-01-2010, 03:24 PM

strut that looks great man. just one question, have any you guys had ground clerance issues? planning a 4/6 drop. pics of how low the tank sits?

SCOTI · 02-01-2010, 03:46 PM

Quote:

Originally Posted by redbaron69

strut that looks great man. just one question, have any you guys had ground clerance issues? planning a 4/6 drop. pics of how low the tank sits?

That's part of my issue w/the limited amount of slope.

My tank was being raised for better ground clearance but the drawback is the fill line angle. I'll prob resort to the straight up fill if I keep the *cheaper* re-pop blazer tank so that I maintain my amount of planned clearance.

*cheaper vs. aftermarket fuel tanks/cells

*lakeroadster* · 02-02-2010, 10:00 AM

I got an invite PM from Scoti to share my modifications. Always glad to help so here goes:

What kind of tank did you use?

"Tanks" P/N 51-CG. It is a stock repro 1949-52 Chevy passenger car steel tank

How did you route the fill line?

Modified 1937 Ford filler neck that I bought from Bob Drake Reproductions P/N 78-9034-B $35.00

What size fill line?

2 inch. The "key" here however is that the tank has a 1/2" vent line.

Any problems w/modern pumps 'shutting off' during the fuel fill process?

I have yet to fill this tank from a filling station.

My '65 C10 gas tank relocation is my 3rd custom gas tank installation. The first was a custom stainless tank I built for my Model A Ford, the 2nd was for my Model T Roadster Pickup. Both cars are V-8 fenderless Hot Rods. I have used a vent line on all 3 and have not experienced the fuel belching problem on any of them.

The belching problem is due to pressure build up within the tank due to inadequate pressure relief. If the fill line is a straight shot down into the tank the pressure vents itself during filling (that's how our OEM tanks work without a vent line and why you fellas with the rear mount top fill tanks in the bed don't need a vent line.) If you have any bends or elbows that causes turbulence during filling, the tank can start to build pressure. A vent line coming out of the top of the tank will solve this problem. However the vent line needs to be installed with a "roll over" valve so that in an accident if the vehicle rolls over gas won't run out of the vent line.

Here are some pic's of my installation. (Notice the vent line adjacent to the fill line.) For more data, including pricing and part number data, check out my build thread.

I hope this data helps....

SCOTI · 02-02-2010, 10:29 AM

Quote:

Originally Posted by lakeroadster

I got an invite PM from Scoti to share my modifications. Always glad to help so here goes:

What kind of tank did you use?

"Tanks" P/N 51-CG. It is a stock repro 1949-52 Chevy passenger car steel tank

How did you route the fill line?

Modified 1937 Ford filler neck that I bought from Bob Drake Reproductions P/N 78-9034-B $35.00

What size fill line?

2 inch. The "key" here however is that the tank has a 1/2" vent line.

Any problems w/modern pumps 'shutting off' during the fuel fill process?

I have yet to fill this tank from a filling station.

My '65 C10 gas tank relocation is my 3rd custom gas tank installation. The first was a custom stainless tank I built for my Model A Ford, the 2nd was for my Model T Roadster Pickup. Both cars are V-8 fenderless Hot Rods. I have used a vent line on all 3 and have not experienced the fuel belching problem on any of them.

The belching problem is due to pressure build up within the tank due to inadequate pressure relief. If the fill line is a straight shot down into the tank the pressure vents itself during filling (that's how our OEM tanks work without a vent line and why you fellas with the rear mount top fill tanks in the bed don't need a vent line.) If you have any bends or elbows that causes turbulence during filling, the tank can start to build pressure. A vent line coming out of the top of the tank will solve this problem. However the vent line needs to be installed with a "roll over" valve so that in an accident if the vehicle rolls over gas won't run out of the vent line.

Here are some pic's of my installation. (Notice the vent line adjacent to the fill line.) For more data, including pricing and part number data, check out my build thread.

I hope this data helps....

Thanks!

Our mounting placement is similar but your 'fill pipe' extends much higher as mine is just above the bed floor (@ 3"). My concern was I have to 90° turn 3" under the floor to get my < 5° slope & I feel that 90 such a short distance from the cap/opening is going to be my dilemma with or without the vent.

**FRENCHBLUE72** · 02-02-2010, 03:15 PM

Idk if it will work on your year bed scoti but john fabris(hope i spelled his name correct) fills his rear tank through the steak pocket hole.... Just an idea..

Strut · 02-02-2010, 07:19 PM

Quote:

Originally Posted by OJ1988

Strut, what size fuel cell, and how low does it hang?

Its a 16 Gallon fuel cell from Summit. I cut the last brace under the bed to get it closer to the bed floor for clearence.

The tank doesn't hang any lower then the rear bumper.....

Strut · 02-02-2010, 07:25 PM

Quote:

Originally Posted by redbaron69

strut that looks great man. just one question, have any you guys had ground clerance issues? planning a 4/6 drop. pics of how low the tank sits?

My truck has a 3/5 drop and there is 13inchs from the lowest point of the tank to the ground.... I'll get a good side view where you can see the ground and the tank as soon as I can. Its pretty nasty outside right now......

lowbuck72 · 02-02-2010, 08:26 PM

How about a pic of the van tank. Curious to how low it hangs down

milner · 04-03-2010, 06:15 PM

Not sure if these help or not but I thought I would post them anyway

http://67-72chevytrucks.com/vboard/s...ht=tail+filler

http://www.classicheartbeat.com/mark...t_gas_door.htm

01-31-2010, 09:52 PM	#26
Strut Registered User Join Date: Oct 2009 Location: Corbin Ky Posts: 247	Re: Questions for under bed gas tank guys.... Here is mine: Hope it helps.... __________________ 1972 Chevy C10 SWB 1999 GMC Sonoma Mini 2008 Yamaha R1 2007 Harley Nightster

02-01-2010, 11:05 AM	#28
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 21,949	Re: Questions for under bed gas tank guys.... ttt __________________ 67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... *Cubic inches is like Indiana Jones with a cheap pistol.*

02-01-2010, 02:23 PM	#30
OJ1988 Just a car guy Join Date: Feb 2006 Location: New Washington, IN Posts: 991	Re: Questions for under bed gas tank guys.... Strut, what size fuel cell, and how low does it hang? __________________ 1955 belair Blown Pro Street cruiser 1971 Camaro Pro Touring 1973 Vega Drag Car 1970 C20 tow rig

02-01-2010, 02:53 PM	#32
Rollie396 someday it will be done! Join Date: Sep 2004 Location: Lloydminster,AB. Canada Posts: 1,620	Re: Questions for under bed gas tank guys.... FWIW I had an old one ton with a deck on it,that would not take fuel.I found out that if I drove up on a 4x4 block so the fuel fill side was higher,it would take fuel without any trouble.I don't imagine you want to be doing that everytime you fill up,but it does suggest the problem is in the angle moreso than the size of pipe. __________________ '72 C-10 Proud owner of a million new and used pieces that used to be and will once again be(god willing) a testament to the term "they don't build em like that anymore. '80 LWB 2wd beater '67 GMC long fleet (cab donor) '66 long step (parked till it's turn comes around) '65 short step (parts truck that will donate it's bed and possibly frame to the '66) '06 Grand Prix wife's car (she hardly lets me touch it) my pics

02-01-2010, 03:24 PM	#33
redbaron69 Registered User Join Date: Jan 2009 Location: marion nc Posts: 588	Re: Questions for under bed gas tank guys.... strut that looks great man. just one question, have any you guys had ground clerance issues? planning a 4/6 drop. pics of how low the tank sits? __________________ 69 short fleet 350/350 "under construction" 70 short step 307/3 speed

02-02-2010, 10:00 AM	#35
lakeroadster Account Suspended Join Date: Sep 2009 Location: High Plains of Colorado Posts: 2,485	Re: Questions for under bed gas tank guys.... I got an invite PM from Scoti to share my modifications. Always glad to help so here goes: What kind of tank did you use? "Tanks" P/N 51-CG. It is a stock repro 1949-52 Chevy passenger car steel tank How did you route the fill line? Modified 1937 Ford filler neck that I bought from Bob Drake Reproductions P/N 78-9034-B $35.00 What size fill line? 2 inch. The "key" here however is that the tank has a 1/2" vent line. Any problems w/modern pumps 'shutting off' during the fuel fill process? I have yet to fill this tank from a filling station. My '65 C10 gas tank relocation is my 3rd custom gas tank installation. The first was a custom stainless tank I built for my Model A Ford, the 2nd was for my Model T Roadster Pickup. Both cars are V-8 fenderless Hot Rods. I have used a vent line on all 3 and have not experienced the fuel belching problem on any of them. The belching problem is due to pressure build up within the tank due to inadequate pressure relief. If the fill line is a straight shot down into the tank the pressure vents itself during filling (that's how our OEM tanks work without a vent line and why you fellas with the rear mount top fill tanks in the bed don't need a vent line.) If you have any bends or elbows that causes turbulence during filling, the tank can start to build pressure. A vent line coming out of the top of the tank will solve this problem. However the vent line needs to be installed with a "roll over" valve so that in an accident if the vehicle rolls over gas won't run out of the vent line. Here are some pic's of my installation. (Notice the vent line adjacent to the fill line.) For more data, including pricing and part number data, check out my build thread. I hope this data helps.... Attached Images Last edited by lakeroadster; 02-02-2010 at 10:07 AM.

02-02-2010, 03:15 PM	#37
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,604	Re: Questions for under bed gas tank guys.... Idk if it will work on your year bed scoti but john fabris(hope i spelled his name correct) fills his rear tank through the steak pocket hole.... Just an idea.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

02-02-2010, 08:26 PM	#40
lowbuck72 Registered User Join Date: Oct 2007 Location: Lafayette, GA Posts: 17	Re: Questions for under bed gas tank guys.... How about a pic of the van tank. Curious to how low it hangs down

04-03-2010, 06:15 PM	#41
milner Registered User Join Date: Jun 2003 Location: Mandan,ND Posts: 268	Re: Questions for under bed gas tank guys.... Not sure if these help or not but I thought I would post them anyway http://67-72chevytrucks.com/vboard/s...ht=tail+filler http://www.classicheartbeat.com/mark...t_gas_door.htm __________________ 355,vortec heads, Doug Herbert cam, Performer intake, 750 Holley, Hooker Comps, 2 1/2 duals w/Aero Chambers, 2500 stall and 3.73 posi.



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