fuel pump/rail question for S5 TII
05-05-04, 07:45 AM
#1
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fuel pump/rail question for S5 TII
I'm swapping the 12A in my first gen for a S5 TII.
Right now, I'm mostly trying to get it run, and uprate later. I will, however, use an SX performance fuel pump, and a surgetank. I was wondering if the stock fuel rails with weld on regulators can cope with this pump. If so, I'd like to run the stock fuel rails for the summer, after which I'd use modified ones with an SX regulator.
I'm a bit afraid the pump might be overkill for the stock system and may cause leaks or damage the stock FPR.
Any idea's?
Right now, I'm mostly trying to get it run, and uprate later. I will, however, use an SX performance fuel pump, and a surgetank. I was wondering if the stock fuel rails with weld on regulators can cope with this pump. If so, I'd like to run the stock fuel rails for the summer, after which I'd use modified ones with an SX regulator.
I'm a bit afraid the pump might be overkill for the stock system and may cause leaks or damage the stock FPR.
Any idea's?
05-05-04, 08:29 AM
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What kind of numbers does that pump make? If you are really worried about it just go with a walbro until you get the modified rails and the regulator. You should be able to find one for ~$150 and then sell it once you dont need it anymore.
05-05-04, 09:03 AM
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That's how they describe it:
I'd never be able to sell the walbro again overhere, so that's no option. It'd be easier to get a new regulator.
Which I might do anyway, I just would like to get the engine running as soon as I can.
The 18201 Electric Fuel Pump is the industry leader in it's class. Designed for both EFI and carburetted applications, the 18201 can support up to 1500 HP with a single pump. Flow tested to deliver 2.4 GPM at 0 PSI to 0.7 GPM at 90 PSI at 12 volts. The 18201 is well suited for normally carburetted and blow through systems, and is excellent for mid range domestic and import applications. It also passes UL Standards for Coast Guard Approval in marine applications.
Which I might do anyway, I just would like to get the engine running as soon as I can.
05-05-04, 01:52 PM
#6
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Originally posted by xfeastonarsex
0.7GPM = 2.65 LPM = 159LPH @90psi for the SX a walbro 255LPH@~90psi flows more and I dont think that you need to modify the fuel regulator for the walbro, so I dont see why you would need to do it for this pump.
0.7GPM = 2.65 LPM = 159LPH @90psi for the SX a walbro 255LPH@~90psi flows more and I dont think that you need to modify the fuel regulator for the walbro, so I dont see why you would need to do it for this pump.
2.4gpm x 60 = 144gph, which is the free-flow flowrate with no backpressure - this is the max capacity which spews right off the fuel pump if it's not connected to anything.
144gph is like three time the fuel flow capacity of the stock FC turbo fuel pump (spec'd at about 3 bar of rail pressure).
0.7gpm x 60 = 42gpm @ 90psi, which is about the same fuel flow of the stock FC turbo fuel pump but at twice the rail pressure!
Extrapolating the numbers, at around 3 bar or about 45psi of rail pressure, the flow rate would be about 90gph. If this is true, it rivals the Aeromotive A1000 fuel pump...
http://fc3spro.com/TECH/MODS/FUEL/fpump.htm
That pump can flow enough fuel for over 600hp on a rotary...easily.
That's a fricken huge fuel pump.
My only reservation is that these SX fuel pumps are not reliable...at least a few years ago, they weren't.
hIGGI should be able to get the Walbro's for you, if you want.
-Ted
