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C5 Fuel Pump Kit, Ultra-Perf (RXP340J)

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Item #: RFPK-052

C5 Fuel Pump Kit, Ultra-Perf (RXP340J)

RFPK-052 - 1997-2003 C5 Corvette Ultra Performance Fuel Pump Kit

This pump will not work on 2003 and newer fuel systems.
This would be the VIN after 114930 (last six digits) built November 25, 2002.


The FPA-052 fuel pump module comes fully assembled with the following components:

  • Racetronix RXP340J 340LPH Turbine Jet-Pump*
  • Bucket with check-valve assembly
  • Filter sock
  • Filter screen
  • Heavy-duty proprietary PnP Teflon in-tank harness
  • High-pressure non-kinking fuel tube
  • Oetiker clamps
  • Silicon pump seal
  • Comes fully assembled
  • Optional tank gasket/hardware kits (listed under add-ons)

Racetronix direct-fit 340LPH Turbine Jet Pump:

The Racetronix RXP340J pump is a direct-fit replacement for the factory Walbro jet-pump. Direct-fit means no modification to the fuel module is required therefore the full scavenging functionality of the fill bucket is maintained. The fill-bucket allows the fuel pump to use its jet + venturi function to keep the pump immersed in fuel at all times regardless of the tank fuel level. This aids in preventing fuel starvation under hard cornering and acceleration. Keeping the pump immersed in fuel also helps prevent moisture damage which can shorten the pump's life. The RXP340J pump uses new turbine technology to reduce pump noise, improve reliability and provide enhanced compatibility with Ethanol enhanced fuels. Since this pump is run at a base pressure of 58PSI (vs. 43.5PSI) its flow rating drops to a nominal 325LPH @ 13.5V (includes fuel diverted for jet-pump).

This combo will support approximately 800FWHP using the factory regulator and fuel lines. This HP number may be less with forced induction applications which require richer air/fuel mixtures and higher fuel pressure. Please see tech note below! Please factor in a 20-25% safety margin between what your motor needs and what your fuel system can supply.

* Our FPWH-052 is required for a HP pump to meet stated performance specifications because the factory wiring was not designed to handle high-performance pumps which draw more than twice the power of a factory pump. A performance reduction of 15-25% in pump performance can be expected along with reduced reliability when a HP pump is run off of the factory harness.

This pump assembly is not compatible with the factory wiring and must be installed with our FPWH-052 upgrade harness. This pump assembly is not compatible with our original FPWH-007 or the factory harness. This pump assembly can't be run off of the factory wiring.

GM type no-kink solvent resistant fuel tube:
This fuel tube is the same type used by GM from the factory. The fuel tube is kink-resistant thanks to its ribbed design. Its special composition makes it more resistant to the solvents in today's pump gas (i.e. toluene, Xylene, MTBE, Ethanol) as compared to
rubber / neoprene which dries out, swells and cracks.

Upgraded dual 14 gauge Teflon in-tank harness (ITWH-052):
Racetronix has upgraded the factory Teflon wiring from 16 gauge to dual-feed 14 gauge multi-strand copper wires. This helps

reduce voltage drop and at the same time maintains the same level of resistance to fuel solvents as the factory wiring.
The Racetronix in-tank wiring harness is a one-piece assembly. One end plugs into the pump (already installed) and the other into the bulkhead connector. Simply transfer over the level sender wire and plug it in. No adapters, cutting or splicing. All connections are OE quality.

Redundant in-tank ground loop (solves factory problem):
The factory in-tank wiring has the ground from the pump and ground from the power connector split into two circuits which relies on push-lock terminals and the module's body as a ground junction source. We have seen these connectors lose and in some cases corroded. If one were to fail the pump would lose power. Racetronix has redesigned the grounding system with a daisy-chain / loop through circuit. This way there are three grounds all tied together thereby making circuit failure almost next to impossible. An extra ground is also provided via the external upgrade harness via a ground lug. This further enhances the fuel module's grounding system and eliminates the chance of a floating ground condition. A floating ground condition will cause a static buildup and potential fuel
ignition. All harnesses are assembled using our computerized crimp-quality monitoring system and then circuit checked for the utmost in reliability.

Fuel Screen / Silicon gasket seal:
A new replacement filter screen and silicon pump seal are provided

Technical note:

The Racetronix FPA-052 with FPWH-052 are capable of supporting approximately 800FWHP @ 0.5 BSFC @ 58PSI (400KPa) using factory lines. In early model C5's with rail-mounted fuel pressure regulators the above HP support can be achieved. Addition of a pump voltage booster may increase support to approximately 900FWHP. Cars with superchargers, turbos and low battery voltage may see lower HP support numbers.

Late model C5's with the returnless rail system will not be able to achieve this level of HP support with the fuel system alone. This is because the point of regulation is at the back of the car. The location of the FPR does not allow it compensate for line pressure drop even though the pressure is stable at the back (regulator location). There are two options to get around this problem. First is to convert the system to a rail mounted FRP return type (best). The second option is to install a pump booster which is activated at the point where rail pressure starts to drop. The boost in fuel volume overwhelms the regulator / return line thereby increasing the fuel pressure at the back of the car which translates to higher pressure at the rail. We recommend the MSD unit for FI applications as it ramps the voltage based on manifold pressure. This prevents a short but abrupt fuel pressure spike which causes the motor to hiccup from brief over-fueling. If you are using an instant-on N2O system then the KB BAP can be considered as well.

Please understand that this is not an issue with the Racetronix system but rather a design limitation of the factory configuration.

2003 C5 Corvettes can be checked for compatibility with the Racetronix fuel system. If your access port for the fuel module can be seen in front of the driver's side rear tire (under the car) then this system will work. If it is not visible then you have the new type of module which goes in from the top of the tank. The Racetronix system is not compatible with this fuel module / system. If you are not sure please have a qualified person check before ordering your system.

Why use a Racetronix Fuel Pump Upgrade Harness?

  • Plug & Play (no cutting or splicing required)
  • Weatherproof factory connectors
  • Heavy 10 gauge automotive-grade copper wire
  • Heavy-duty weatherproof relay
  • Weatherproof fuse holder
  • Alternator-direct power for maximum pump performance
  • Silicon grease, spare fuse, wire ties included
  • Stainless steel mounting hardware
  • Compatible with various pump boosters (i.e. KB, MSD) (included)
  • Key-off fuel pump power jumper and drainage kit (optional)

Image may vary from actual product

* This harness may NOT be used with the factory fuel pump assembly or our FPA-005(A) 255LPH upgrade. This harness has reconfigured output wiring to accomodate the power demands of our FPA-052 340LPH based pump solution.

Alternator-direct power for maximum voltage / True PnP with GM type connectors:
The Racetronix PnP upgrade harness provides alternator direct power for maximum pump voltage. Racetronix has documented an average 1.5-2.0V increase in pump voltage in the C5 which equates to a 15-20% increase in pump volume based on Racetronix field tests using our FPA-025. The harness is fully 'plug and play' and is installed without cutting into factory wiring. The entire harness is weatherproof made with the same Delphi interconnect components used throughout your C5. The harness' operation is quite simple. The factory power wire which was once used to power the fuel pump is used to trigger a relay which in turn supplies power directly from the alternator with fused protection.

Redundant grounds = improved voltage & reliability:
A redundant ground is provided which loops into the harness. This loop enhances ground to the factory harness making a two-fold improvement. A secondary ground for the fuel module is also provided. This enhances the ground at the pump's source and through the fuel module's body. (see above)

Pump-booster PnP ready:
The Racetronix harness is equipped with an intermediate high-current (30 amp) connector just after the relay. This allows for easy plug & play addition of a pump voltage booster which can increase pump performance upwards of 30%. A spare connector assembly set is included so that any booster can be adapted to plug into the Racetronix harness. The Racetronix harness further enhances pump booster performance by eliminating voltage drop. The heavy 10 gauge power feed is more than capable of handling the 15-20 amp loads generated by the pump at boosted voltages.

Fuel Pump Drain & Power System (optional C5-FDK)
A special wiring harness is included with this system which allows the in-tank pump to be powered up without the vehicle running. This can be used to help drain much of the fuel from the tank before undergoing replacement of the factory pump or to drain race fuel from the tank at the track. Simply install the Racetronix upgrade harness, unplug the intermediate pump booster connector and plug this drain harness in. Attach the alligator clip to the back of the alternator + or battery + to supply power. The harness is fused for your safety and is assembled with fuel resistant wire. A length of clear vinyl hose with gear clamp is included which is attached to the fuel module's 'black' outlet port to aid in draining the tank.

Hardware included:

There is nothing worse than being in the middle of an installation only to find that the manufacturer has skimped on installation hardware. This is why Racetronix supplies a spare ATM fuse, 25 black nylon wire ties, silicon grease and stainless mounting hardware with each kit.

Racetronix harnesses are considered the best by which all others are judged. Attention to detail in every Racetronix harness is evident at first glance. Racetronix spares no expense to ensure reliability, ease of installation and performance.
All Racetronix harnesses are assembled using our computerized crimp-quality monitoring system and then circuit checked for the utmost in reliability. This Racetronix harness is backed by our limited lifetime warranty.

Fuel Pump Assemblies (Racetronix)

C5 Fuel Pump Assembly UHP (RXP340J) (Qty:1)

Fuel Pump - Hotwire / Upgrade Harnesses

C5 Fuel Pump Wiring harness HD (Qty:1)

Connector Sets

Pump booster interface connector set (Qty:1)
Base Price: $399.00 Your Price: $