tpi conversion fuel lines ?
Pro
Joined: Nov 2003
Posts: 692
Likes: 1
From: Peabody Ma.
I went to a local hydraulic shop and SS braided made for the same money as AN lines and fittings. I think there fittings are better and they crimp them on! I tried buying the AN fittings and lines, I got so aggrevated trying to make them. If it were me I would 1 goto hydraulic shop and have them made. 2 Look towards the efi rubber with push on fittings! My 02
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
I bought some TPI fuel lines from arizona TPI, they come in 12" lengths...I bent the lines at a 90 degree bend and attached a piece of rubber hose between them and fuel lines mounted to the frame.
Worked great
Worked great
Burning Brakes
Joined: Nov 2005
Posts: 1,143
Likes: 0
From: Leander Texas
I bought a set of EFI lines at a local Pick a Part from a early 90's full size chevy truck with TBI cost was less than $10.oo for both pressure, and return. I just had to straighten them out, and rebend to my needs.
The lines have swedges for retaining hoses on the ends.
The lines have swedges for retaining hoses on the ends.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
I bought a C4 set of lines. I used the pressure line from pump to engine and added a short section of line from original (new) line to the filter by using brass unions. You really should use hydraulic unions and I am going to change them sometime. The return line on the C4 is 3/8 and the return line on the C3 is 1/4(?) so I got a threaded fitting and made a reducer. Again you should really use a hydraulic union instead of brass. All your rubber hose should be FI type hose, not low pressure fuel line. They make special FI clamps that you can buy at any of the parts houses. They wrap around the hose fully so none squeezes through the clamp. If you have a friendly junkyard, Nissan uses a lot of these clamps.
My system: tank sending unit to pump on frame rail. I used a Ford truck (88 external) pump so I got a Ford fuel line and cut the quick connect off and put FI hose on it then to the fuel line on the car. Union, short piece then filter. Then C4 lines to the fuel rail. Out of fuel rail with C4 lines, reducer, car lines, short section of FI hose to return to tank.
My system: tank sending unit to pump on frame rail. I used a Ford truck (88 external) pump so I got a Ford fuel line and cut the quick connect off and put FI hose on it then to the fuel line on the car. Union, short piece then filter. Then C4 lines to the fuel rail. Out of fuel rail with C4 lines, reducer, car lines, short section of FI hose to return to tank.
Racer
Joined: Oct 2004
Posts: 439
Likes: 0
From: Mukilteo Washington
Nice, did you connect the 3/8 return line from the fuel rail to your original 1/4 return line?
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Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
The kit comes with a 3/8" and a 5/16" line.....the larger line (3/8") connects to the stock corvette feed line and the smaller (5/16") connects to the return line.
The "kit" is roughly (if not the same) size as the stock lines.
Melting Slicks
Joined: Feb 2006
Posts: 2,753
Likes: 14
From: backwoods upstate ny
my local napa sells the 3/8 and 5/16" nylon high pressure tubing, same as used on lt1 caprices/etc...has a myriad of ends, saginaw (tpi oem type) to compression union (like your bathroom faucet)...the nylon tubing is small and very flexible...ends "crimp" on with an ordinary pair of "end cutter" pliers...$75- $150 (varies with length and ends reqd) to do the entire supply/return from tank to fuel rail.
Limping across the line
Joined: Oct 2002
Posts: 5,295
Likes: 109
From: Peoria Az
If you prefer to make your own lines.. Use these http://www.anplumbing.com/shop/index...=Fuel!_Adapter at the connection to the manifold 12-14mm 1each if I remember correctly.
Also use the hard line adaptors to go from -6 AN to 3/8 and 5/16 hard line http://www.anplumbing.com/shop/index...&dept=Aluminum
KENS80V: please don' take offense but you have way too many adaptors at your hard line connection at the frame
Also use the hard line adaptors to go from -6 AN to 3/8 and 5/16 hard line http://www.anplumbing.com/shop/index...&dept=Aluminum
KENS80V: please don' take offense but you have way too many adaptors at your hard line connection at the frame
Last edited by AzMotorhead; Mar 3, 2008 at 06:22 PM.
Racer
Joined: Oct 2004
Posts: 439
Likes: 0
From: Mukilteo Washington
http://www.aztpi.com/product.php?pro...6&cat=0&page=1
but my Corvette style fuel rails are both 3/8" with 16MM threads, maybe this will work
http://www.aztpi.com/product.php?pro...&cat=18&page=1
My 1977 Corvette has a 1/4" return line if I use this I will have to some how reduce the 3/8" line to a 1/4". Any ideas?
Melting Slicks
Joined: Aug 2004
Posts: 2,887
Likes: 221
From: Oakbank Manitoba
If you prefer to make your own lines.. Use these http://www.anplumbing.com/shop/index...=Fuel!_Adapter at the connection to the manifold 12-14mm 1each if I remember correctly.
Also use the hard line adaptors to go from -6 AN to 3/8 and 5/16 hard line http://www.anplumbing.com/shop/index...&dept=Aluminum
KENS80V: please don' take offense but you have way too many adaptors at your hard line connection at the frame
Also use the hard line adaptors to go from -6 AN to 3/8 and 5/16 hard line http://www.anplumbing.com/shop/index...&dept=Aluminum
KENS80V: please don' take offense but you have way too many adaptors at your hard line connection at the frame
Last edited by KENS80V; Mar 4, 2008 at 12:01 PM. Reason: picture
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
I have been running Erols black rubber hose, and/or FI black hose rated to 250 psi pressure and been fine with it, and double clamped to the stock fuel lines for years now....using the 1/4 inch return line too, and never seen it restrict flow....never been an operational issue....
Team Owner
Joined: Jul 1999
Posts: 65,492
Likes: 230
From: Orange Park Florida
and I use double clamps for years now on good hose, at the stock lines using stockish screw hose clamps the narrow ones with 1/4 inch hex screws on them....now I am TOLD they are not fuel injection rated, but using two of them has never been an issue....I going to check into that and see what I find out....you maybe want to do same....
Melting Slicks
Joined: Jun 2005
Posts: 2,938
Likes: 2
From: Arkansas
I'm not sure, maybe a brass reducer fitting? You might be able to insert a punch or something in your 1/4" line to enlarge it enough to get a 3/8" fuel hose on it.
Pro
Joined: Nov 2000
Posts: 594
Likes: 0
From: Tucson AZ
There are only two adapters in use. They are the blue aluminum fitting (6AN to 6AN female) and the steel (5AN to 6AN male) adapter. There is an L bracket mounted to the frame with two steel bulk head connectors to solidly mount the 3/8 and 5/16 stainless hard lines from the tank. You can't get any stronger than that.
I did something very similar to yours when I did mine 6 years ago. I ran 3/8 hardline form the EFI system to a bracket
mounted here on the head. AN-6 lines connect from there to
here where hard lines run back to the pump.
Craig
