SKU: 91900588987

Tork Teknology P7100 High Performance Overflow Valve 94-98 Dodge 5.9L Cummins

Sale price$40.50 Regular price$45.00
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Description

Tork Teknology P7100 High Performance Overflow Valve 94-98 Dodge 5.9L CumminsDo you experience low fuel pressure at wide open throttle after installing an aftermarket electric lift pump? Unfortunately, this is all too common, but we have the fix. The problem stems from the factory overflow valve having too large of an orifice, which causes excessive fuel to be returned to the fuel tank. The inlet orifice on a standard overflow valve will flow 1. 14 GPM back to the tank. If you are running a 100 GPH pump, you are pumping 1. 66

Do you experience low fuel pressure at wide open throttle after installing an aftermarket electric lift pump? Unfortunately, this is all too common, but we have the fix. The problem stems from the factory overflow valve having too large of an orifice, which causes excessive fuel to be returned to the fuel tank. The inlet orifice on a standard overflow valve will flow 1.14 GPM back to the tank. If you are running a 100 GPH pump, you are pumping 1.66 GPM, which means you are losing 69% of your pump volume through the stock overflow valve. Seeing these numbers makes it fairly obvious why there is a significant power loss at higher RPM.

We offer this simple and effective overflow valve in four different sizes, so which one is right for you?

The general rule to determine the fuel pressure you should be at is to multiply the governor spring RPM (in thousands) by 10. In other words, you want 10 PSI of fuel pressure per 1000 RPM of governor speed. So, if you installed a 3K governor spring kit, you need a minimum of 30 PSI at full power, a 4K kit requires 40 PSI at WOT, and 5K equates to 50 PSI at WOT.

  • The OFV040HP has the largest orifice for street use. This valve is for lightly modified street performance trucks in the 275 to 350 horsepower range running an AirDog or FASS pump. Fuel pressure will range between 30 to 37 PSI.
  • The OFV050HP has the second largest orifice for street use. This valve is for moderately modified street performance trucks in the 350 to 450 horsepower range using an AirDog or FASS pump. Fuel pressure is in the 37 to 45 PSI range, at full power.
  • The OFV060HP has the third smallest orifice for highly modified Cummins diesel engines. This valve is for heavily modified street performance trucks in the 500 to 600 horsepower range using an AirDog or FASS pump. Fuel pressure will be in the 43 to 50 PSI range, at full power.
  • The OFV075HP has the smallest orifice, and is NOT for street use, because it will not provide adequate long term cooling to the pump.

IMPORTANT NOTE: Do not use the HP valve on a stock fuel system! The valve is intended for P pump trucks using a FASS, Air Dog or high volume, performance fuel pump only.

Shipping Notes
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 91900588987

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Junior Omar Arias Chavarria
Birmingham, US
★★★★★ 5
Se ve excelente
Se ve de buena calidad, aún no lo instaló pero si se aprecia muy bueno.
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Reviewed in the United States on April 11, 2026
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Armando salazar
Natrona Heights, US
★★★★★ 5
Ez install
I really like how EZ it was to install, the display is handy tells you what your voltage is currently. Nice
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Reviewed in the United States on February 5, 2026
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Travis Newman
Houston, US
★★★★★ 5
Prompt arrival
It works as it should. I have a 500 amp fuse inside. It came with a 100 amp fuse already installed. I have heard too many horror stories about being a "team no fuse". I'm glad mine came the following day after ordering it. The voltmeter is nice and clear. Although I won't keep it on all the time, just to show off when I have my hood up at gatherings 😎
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Reviewed in the United States on November 22, 2024
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Chris
Carnegie, US
★★★★★ 5
Fuse Holder Block
Size: 300A
Good Value and good product
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Reviewed in the United States on December 29, 2025
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Riley Matzdorff
Boise, US
★★★★★ 5
Does the job
Size: 300A
Fuses seem good quality. Did what they need to do. Would buy again.
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Reviewed in the United States on October 31, 2025

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