fuel surge tank - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

hpt_simon · 30th September 2008, 08:19 AM

hi everyone,

well im about to start fabricating my own fuel surge tank, plan is:

2 x bosh 044
.lines
5 liter tank
use tomei pump i have as lifter pump
modify standard fuel rail to 2 inlet and middle outlet.

only 1 question i have
might be simple

what size fittings and lines should i use?

lifter to surge tank:
surge tank to pumps:
pumps to fuel rail:
fuel rail return to surge tank:
surge tank overflow to petrol tank:

i was asuming al -6 and -8 all returns right?

thanks in andvance

simon

kismetcapitan · 30th September 2008, 09:05 AM

why modify your fuel rail? A Tomei will already be set up with -6 fittings.

Just use -6 lines for everything. I had thought a -8 return line would be needed, but there are a LOT of twin pump setups that use a single -6 return.

Your overflow line doesn't need to be braided. Neither does your lifter line, come to think of it, as neither is pressurized.

Two suggestions: use checkvalves (Aeromotive -6AN inline) at each end of your fuelrail. It will help keep your rail pressurized, and in case one pump fails, you can still drive your can no problem.

The other? Isolate the 044s as much as possible. Use mounting brackets with rubber, and isolate the bracket to car connection with rubber grommets as well. I didn't - custom aluminum bracket directly holding the pump, directly bolted to the car. The humming is quite loud from 044s, but can be minimized with rubber isolation. My pump holder is bulletproof, but if anything, amplifies the sound of the pumps

30th September 2008, 08:19 AM	#1 (permalink)
hpt_simon GTR Register Member Join Date: May 2006 Location: barcelona Posts: 220	fuel surge tank hi everyone, well im about to start fabricating my own fuel surge tank, plan is: 2 x bosh 044 .lines 5 liter tank use tomei pump i have as lifter pump modify standard fuel rail to 2 inlet and middle outlet. only 1 question i have might be simple what size fittings and lines should i use? lifter to surge tank: surge tank to pumps: pumps to fuel rail: fuel rail return to surge tank: surge tank overflow to petrol tank: i was asuming al -6 and -8 all returns right? thanks in andvance simon

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30th September 2008, 09:05 AM	#2 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,300	why modify your fuel rail? A Tomei will already be set up with -6 fittings. Just use -6 lines for everything. I had thought a -8 return line would be needed, but there are a LOT of twin pump setups that use a single -6 return. Your overflow line doesn't need to be braided. Neither does your lifter line, come to think of it, as neither is pressurized. Two suggestions: use checkvalves (Aeromotive -6AN inline) at each end of your fuelrail. It will help keep your rail pressurized, and in case one pump fails, you can still drive your can no problem. The other? Isolate the 044s as much as possible. Use mounting brackets with rubber, and isolate the bracket to car connection with rubber grommets as well. I didn't - custom aluminum bracket directly holding the pump, directly bolted to the car. The humming is quite loud from 044s, but can be minimized with rubber isolation. My pump holder is bulletproof, but if anything, amplifies the sound of the pumps