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#1
05-06-2003, 02:29 PM
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What kind of gas tank would I need if I converted to efi? Will the stock tank work or not? Thanks!
A$$, cash, or grass--you don't ride for free 
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A$$, cash, or grass--you don't ride for free 
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#2
05-06-2003, 02:29 PM
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What kind of gas tank would I need if I converted to efi? Will the stock tank work or not? Thanks!
A$$, cash, or grass--you don't ride for free
__________________
A$$, cash, or grass--you don't ride for free
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#3
05-06-2003, 05:31 PM
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Most current pumps are designed to fit inside the tank and be cooled by the fuel. They also require
special wiring terminals that are usually a part of the sending unit. A good friend, RICHARD COLE (an outstanding metal fabricator for McLaren Engines), modified a stock tank by welding in a sump and mounted a Weldon EFI pump inside the tank that picked up fuel from dual fine mesh high volume plastic pick-up screens. He used a -6 bulkhead fitting mounted on the normal sending unit flange to get the fuel out of the tank in the stock location. He also made special plastic terminals with metal pins to get power from outside the tank inside to the fuel pump. He will use a stock efi regulator with a bypass function to maintain fuel pressure at the engine. Tom V. 
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"Engineers do stuff for reasons" Tom Vaught Despite small distractions, there are those who will go Forward, Learning, Sharing Knowledge, Doing what they can to help others move forward. |
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#4
05-06-2003, 05:46 PM
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Im converting to EFI and am modifying a new stock gas tank with a sump and weld on steel male AN fittings for the pickup and return. The pump will be external.
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#5
05-06-2003, 07:34 PM
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I sumped my factory tank w/ a 304 stainless unit I fab'ed. Welded two 1/2" NPT stainless bungs on it (at the rear of course) and welded a 3/8" NPT bung to the upper passenger side for the return.
Currently plumbing everything.  SECOND AMENDMENT: AMERICA'S ORIGINAL HOMELAND SECURITY. I Misus Rash'!
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SECOND AMENDMENT: AMERICA'S ORIGINAL HOMELAND SECURITY! |
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#6
05-06-2003, 07:53 PM
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Stock tank will work. You will have to figure out where to put the electric pump and then fabricate 3/8 to 1/2 high preasure line with fittings on it and a return line back to the pump that will hold the high preasure required for EFI
connman
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connman |
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#7
05-06-2003, 07:59 PM
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The main thing to remember with EFI is the fact that the fuel is always running from the tank to the rails, With the excess back to the tank through the back pressure regulator. Because of this, a stock tank without a sump when less than half full, will start to suck air in corners. I had this problem when we first installed the EFI. I got one of those wienie sumps from Jegs. I still had the problem in hard corners. That thing was worthless. So Bill fabed a new 8" wide by 6"deep sump. Now I can hang corners without spuddering. Some are even using a small external tank. The small tank holds a half gallon or so. The return line can also be plumbed into the small tank.
 TigerEFI.com (Classic Pontiac Fuel Injection) Jack@TigerEFI.com Motto: Build it for NASA and drive it like you stole it!
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 TigerEFI.com (Classic Pontiac Fuel Injection) 2004 GTO Company car, 1994 TA 25th Anv, 1971 Grand Safari Wagon, 1968 GTO EFI, 1968 GTO Stock, 1968 GTO Convertible in desperate need of restoration. |
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#8
05-06-2003, 08:12 PM
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Thanks for the info guys. The kit I am looking at is from http://www.customefis.com. The kit seems to be good and includes everything according to the guy. The fuel pump however is an external one so does that make a difference.
Thanks! A$$, cash, or grass--you don't ride for free
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A$$, cash, or grass--you don't ride for free
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