what prevents me from
Thread Starter
Team Owner
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
what prevents me from
Running a -10 braided stainless steel hose to the gas tank?
My fuel pump requires a -10 line, as well as my HP requirements....
My fuel pump requires a -10 line, as well as my HP requirements....
Thread Starter
Team Owner
Joined: Apr 2002
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
Originally Posted by Greg
Don't let anything but fear and common sense hold you back! 
Melting Slicks
Joined: Jul 2000
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From: Beacon NY
I have a fuel pump that also has a -10 fitting on its inlet. However, since I'm using the stock sending unit on my '79, I didn't see the point in running -10 line. The diamater of the large sending unit tube is slightly smaller than the diameter of a -6 line. Being the novice mechanic that I am, I would assume that since the diameter of the tube from the sending unit is smaller than a -6 line, fuel won't flow any faster through a -10 line than it would through a -6 line.
So what I'm saying is you probably are going to need to upgrade your sending unit somehow so that the tube drawing from the tank is no smaller than a -10 line. I think I would install a -10 bulkhead into the tank and draw from that if I needed that much fuel.
Since I'm running a fairly average 465 hp 383, I didn't think I would need enough fuel to warrant running a -10 line. I ran -6 line and used a fitting to reduce the -10 fitting on the pump to a -6. Somebody please let me know if I'm completely wrong with my logic and I messed this up!
So what I'm saying is you probably are going to need to upgrade your sending unit somehow so that the tube drawing from the tank is no smaller than a -10 line. I think I would install a -10 bulkhead into the tank and draw from that if I needed that much fuel.
Since I'm running a fairly average 465 hp 383, I didn't think I would need enough fuel to warrant running a -10 line. I ran -6 line and used a fitting to reduce the -10 fitting on the pump to a -6. Somebody please let me know if I'm completely wrong with my logic and I messed this up!
Last edited by Victor; Jun 20, 2006 at 01:20 AM.
Racer
Joined: Mar 2005
Posts: 473
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From: Champlin Minnesota
Originally Posted by rcread
Braided fuel lines can leave your garage smelling like fuel. If that doesn't bother you, go for it.
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Originally Posted by davidm_comp
Why would braided fuel lines make your garage smell like gas, as compared to steel lines with rubber lines from the tank? I cannot believe that they would leak gas, unless you did not put the connections on correctly.
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Melting Slicks
Joined: Jan 2006
Posts: 3,028
Likes: 2
From: North NJ
Originally Posted by MartyW
I as wondering the exact same thing.
Victor, what brand hose did you use? how did you attach it to the sending unit? and did you run a return line?
If your hp requirements need a -10 line then you might as well put a bulkhead in the lowest part of the tank with a -10 fitting. You've got to be running a high power electric fuel pump or high perf mechanical pump with hp requirement like that so I see no point in running a -10 line if you initially have to squeeze the fuel out of a sending unit that smaller than -6. There would be no benefit of the -10 line then.
If -10 is needed then do -10 all around.
good luck guru
Le Mans Master
Joined: Oct 2004
Posts: 5,269
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From: Orlando Florida
St. Jude Donor '05
I need new fuel lines, too 
As a temporary solution (well, it's been like this for over a year) I installed a fuel resistant hose between the tank and the passenger side rocker panel. From there to the fuel pump is normal steel fuel line...
The rear section was rusted and leaked, that's why I (again: temporarily) installed a hose..... it's been there long enough, time to get the "real" fuel line installed.
Aren't these SS braided hoses made for fuel ? There's not even pressure on that line - only between the pump and the carb.
again : and:
As a temporary solution (well, it's been like this for over a year) I installed a fuel resistant hose between the tank and the passenger side rocker panel. From there to the fuel pump is normal steel fuel line...
The rear section was rusted and leaked, that's why I (again: temporarily) installed a hose..... it's been there long enough, time to get the "real" fuel line installed.
Aren't these SS braided hoses made for fuel ? There's not even pressure on that line - only between the pump and the carb.
again :
and:
Team Owner
Joined: Jun 2004
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From: Smile, it's just the internet.
That's 5/8! Hell, your bathtub faucet only uses 1/2! You should be able to pump 15 gallons per minute through that at less than 50 psi. Unless you are running alcohol and pushing serious HP, -10 is just overkill to the extreme. The L88 and ZL1 engines managed to lumber along with 3/8 (-6) line at 6 psi.
Melting Slicks
Joined: Jul 2000
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From: Beacon NY
Originally Posted by 68 NJConv 454
Victor, what brand hose did you use? how did you attach it to the sending unit? and did you run a return line?
2) To attach to the sending unit I used a 2" piece of rubber tube from the sending unit to a socketless tube fitting from Aeroquip http://store.summitracing.com/egnsea...=AER%2DFBM1512. From that piece, I used a -6 AN coupler http://store.summitracing.com/egnsea...=AER%2DFBM2052 and then I attached my braided line to that.
Originally my '79 had a 2" piece of rubber tubing running from the tank to the fuel line so I'm not worried about the safety of the setup. It worked like that for 27 years without a problem.
My original plan was to cut off the nipple from the sending unit, install a 3/8" to -6 AN flared fitting. However, after cutting off the nipple from the sending unit, I discovered that there isn't enough room to slide the flared fitting back down the sending unit tube to use a flaring tool. So in the end, I had to buy a new sending unit.
3) The mechanical fuel pump that I'm going to be using doesn't have provisions to install a return line so I just left the return line tube on my sending unit open.
Hope that helps
Team Owner
Joined: Feb 1999
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From: Republic of Texas
Originally Posted by CGGorman
That's 5/8! Hell, your bathtub faucet only uses 1/2! You should be able to pump 15 gallons per minute through that at less than 50 psi. Unless you are running alcohol and pushing serious HP, -10 is just overkill to the extreme. The L88 and ZL1 engines managed to lumber along with 3/8 (-6) line at 6 psi.
I'm making around 600hp +/- and never miss a beat even at 6800rpms...
Race Director
Joined: Nov 1999
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From: Foxfield CO 1970 Convertible
Originally Posted by CGGorman
That's 5/8! Hell, your bathtub faucet only uses 1/2! You should be able to pump 15 gallons per minute through that at less than 50 psi. Unless you are running alcohol and pushing serious HP, -10 is just overkill to the extreme. The L88 and ZL1 engines managed to lumber along with 3/8 (-6) line at 6 psi.
-10 would really be pushing it. I ran -8 all the way from the tank to the engine and back through a return line. There were some places where it *just* fit. -10 would be a tight squeeze unless you didn't run the line in the stock locations. Here's how I ran mine...
By the way, there is absolutely no gas smell associated with my setup.
http://temp.corvetteforum.net/c3/zma.../FuelSys02.htm
Melting Slicks
Joined: Nov 2001
Posts: 2,668
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From: Eastern US XX
Originally Posted by rcread
Braided fuel lines can leave your garage smelling like fuel. If that doesn't bother you, go for it.
Melting Slicks
Joined: Jan 2006
Posts: 3,028
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From: North NJ
I've seen members squeeze -6 to carb and return line along passenger side frame? Can you squeeze -8 same way? I'd like to avoid running hose down pass side then back along driver.
Also, can you run -8 to carb and -6 return line? since you won't be returning as much fuel as you pump to the carb.
Also, can you run -8 to carb and -6 return line? since you won't be returning as much fuel as you pump to the carb.
Last edited by 68 NJConv 454; Jun 21, 2006 at 11:40 AM.
Thread Starter
Team Owner
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From: All humans are vermin in the eyes of Guru VA
Cruise-In IV Veteran
Cruise-In V Veteran
http://www.racepumps.com/fuel_system...00hpBoost.html
I could probably pull of a -8 line, but might as well only do it once.
I could probably pull of a -8 line, but might as well only do it once.
