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CJM Road Race Fuel Pump, Production Round 4

Originally Posted by phunk References: The RRP, in standard configuration, holds a Walbro 255lph fuel pump. Its not a normal Walbro 255, it is a special model with a second

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Old 12-19-2015, 12:13 AM   #1 (permalink)
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The RRP, in standard configuration, holds a Walbro 255lph fuel pump. Its not a normal Walbro 255, it is a special model with a second stage. The second stage of this pump is a solid-state jet pump used for the RRP's self-filling feature. This means that, not only is the RRP surge canister fed by the standard fuel pump (on passenger side) as an ordinary surge canister is, but it also pulls in fuel itself from the driver's side of the tank.

[U] the RRP's 255 will be the pump sending fuel to the engine & rails, and whichever pump is in the factory module will only be sending fuel to the RRP canister.
So as I read the above passage, it would seem that the RRP would provide fuel to the engine even if the factory pump failed, is this correct? Could you run the RRP as a stand alone pump with a Hydra mat setup to scavenge fuel from the entire tank?

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Old 12-19-2015, 03:28 PM   #2 (permalink)
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So as I read the above passage, it would seem that the RRP would provide fuel to the engine even if the factory pump failed, is this correct? Could you run the RRP as a stand alone pump with a Hydra mat setup to scavenge fuel from the entire tank?

Thanks
The RRP is self-filling from the drivers side of the tank, much like how the factory pump is self-filling from the passenger side of the tank.

If the factory fuel pump was removed, the RRP would lose its supply of fuel from the passenger side. This would cause it to have its own starvation side effects as it would not have any supply of fuel from the passenger side.

The RRP is a mostly closed canister, very similar to an external surge canister only it resides inside the tank. Anything attached to the fuel pump would also be contained within this canister... so if anyone devised a way to attach a hydramat to the pump inside the RRP, it would not really serve a purpose as the hydramat would not be exposed to any fuel outside of the RRP canister.

The RRP in its intended layout has proven to resolve starvation to the fullest... so I cannot say I see any purpose in trying to increase its function with a hydramat, as it already outperforms one.
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Old 12-20-2015, 12:25 PM   #3 (permalink)
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