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Fuel pressure safety switch an sending unit issue

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Old 08-01-2017, 10:14 AM
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Default Fuel pressure safety switch an sending unit issue

Is anyone having issues getting their fuel pressure safety switch to work? How many have ditched it entirely? Also for those of you that have a stand alone fuel cell for N2O, do you have your gauge in the cabin hooked to the fuel line leading to the stand alone, or is measuring pressure on the fuel rails? My fuel pressure sending unit is currently on my rail, so if there is a problem with fuel pressure from the standalone cell, I won't be able to see it from within the cabin. I have a mechanical gauge on the stand alone, but that is only visible from under the hood. Perhaps I should switch my sending unit so that it is in-line with the stand alone, so that I can actually monitor it properly.

Here's how it's setup now. Excuse my poor photoshop skills.



A: -8AN Straight Thread O-Ring Cap (comes with holley fuel rail kit 534-209)
B: -6AN Flare to -8AN Straight Thread O-Ring (comes in 534-209)
C: 90 degree -6AN fem to -6AN male adapter
D: -6AN Straight Swivel Hose End Fitting
E: -6AN fuel hose
F: 15637 AN-08 / 1/8-NPT Fitting
G: ERL-925106 -6 "T" Female swivel on side
H: -6 AN Male To -6 AN Female With Two 1/8" NPT Ports
I: Fuel pressure sending unit
J: -6AN fuel hose
K: PRE-10690BLK -6 an 90 Degree Swivel Hose End
L: Stock fuel line adapter
M: Stock fuel line

I could have purchased the Fast Fuel Line Conversion Kit 54028-KIT which come with essentially everything but "G" and "H" listed above, but I wanted to have more flexibility with the setup so I pieced it together.



A: -8 AN Male to 3/8" NPT Male 90 Degree (comes with 00-12050)
B: -6AN Straight Swivel Hose End Fitting (comes with 00-12050)
C: -6AN line (comes with 00-12050)
D: AT9893046ERL Female 4 AN to Male 6 AN Expander
E: 00-0171 -4AN Swivel Manifold With Dual 1/8 NPT Ports
F: Fuel Pressure Safety Switch
G: 1/4 NPT x -4AN 90 degree
H: N2O outlet stand alone fuel cell 00-12050



Not pictured are the parts used for the flexible blow down tube which connects at point "A" in the pic above:

1. PRE-10800BLK -8 AN Straight Swivel Hose End Fitting
2. PRE-10880BLK -8 AN 180 Degree Swivel Hose End Fitting
3. -8AN Braided Stainless Steel Hose, 3 ft
4. -8AN Male Straight Bulkhead Fitting 483108-BL

Also not pictured is how I tapped my N2O pressure sending unit into the N2O line for my electric N2O pressure gauge that I have mounted inside the car:

1. PRE-704018BLK -4 AN Braided Stainless Steel Nitrous / Gauge Hose 18"
2. PPD-91904-2 Male 4 AN to -4 AN Male Union Coupler With 1/8" NPT port

Last edited by 5.7stroker; 08-01-2017 at 02:34 PM.



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