CLASS RACER FORUM - fuel check

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hi,
stock eliminator nhra still doing fuel check?? do i need a tap off fuel line next to carb? does someone sell a kit, i can most likely make one with brass fittings and petcock
Gary

I bracket race but a lot of my competition is from NHRA legal S-SS cars. I have it after the regulator under the hood. I've seen it done on the cheep with hardware store fittings and $100 billet aluminum stuff that leaks. Long story short: if it's in the book, you need it. Checking it is up to the tech.

Quote:

Originally Posted by garyc (Post 639139)

hi,
stock eliminator nhra still doing fuel check?? do i need a tap off fuel line next to carb? does someone sell a kit, i can most likely make one with brass fittings and petcock
Gary

The problem with commercial fittings is that they may leak because the seal or "O" ring material may not survive when exposed to fuel and if you have an EFI system, they may not hold the higher fuel pressure.

If you have an EFI fuel system, that exceeds 60 PSI of fuel pressure, then you need the Aeromotive Sampling valve.

The Saf-Air fuel sampling valves are FAA approved and used in general aviation and affordable and even sold with a hose by RJ Race Cars. They have a brass and stainless steel version and have Viton seals.

https://www.aircraftspruce.com/catal...ircav110h4.php

https://www.mcfarlaneaviation.com/pr...roduct/110HSS/

https://quartermax.com/fuel-sample-valve/

https://www.appliedracing.com/an-fit...ple-valve.html

https://www.speedwaymotors.com/AFCO-...CABEgJOYvD_BwE

thanks for the links

Its really handy to have a way operate the fuel pump from the engine compartment, not required just handy. I use a momentary switch wired to the pump that I installed on the fender apron.

Kelly Lane
4991 STK

Quote:

Originally Posted by Shadylane (Post 639171)

Is the switch wired directly to the pump, bypassing the ignition switch?
The rule book specifies that the fuel pump must shut off with car’s ignition switch.

Quote:

Originally Posted by SSDiv6 (Post 639183)

Is the switch wired directly to the pump, bypassing the ignition switch?
The rule book specifies that the fuel pump must shut off with car’s ignition switch.

It’s a dedicated switch that operates the pump independently of the ignition switch.

Quote:

Originally Posted by Shadylane (Post 639184)

It’s a dedicated switch that operates the pump independently of the ignition switch.

Thank you for the clarification.

Quote:

Originally Posted by Shadylane (Post 639171)

I have the same, very handy, make sure to use a momentary switch. I don;t have a return line on the pressure regulator, so I use that outlet and hooked up brass fittings and a brass shutoff used for an icemaker line.

I use a fuel shut of for a Motorcycle. The type that screws into the bottom of the gas tank. It’s the same pipe thread as the outlet port of the regulator. Put a length of rubber hose on the barbed end.