![]() However, the vacuum/boost reference line must be installed.Ĭan I use a FPD-XR? Yes. Even though fuel pressure is 73.5psi at full boost, the FPD-R will work because the base static pressure was set within the 40-70psi requirement. Any dynamic fuel pressure created by a rising-rate FPR outside of this range is acceptable, but only when the base "static" fuel pressure is set within these ranges and the vacuum/boost reference line is connected.Ĭan I use a FPD-R? Yes. IMPORTANT: The ranges above are base static fuel pressures only. The FPD- R (Fuel Pulse Damper- Range) and FPD- XR (Fuel Pulse Damper- Extra Range) both have unique base "static" fuel pressure requirements:įPD-R base pressure requirement = 40 - 70psi (static)įPD-XR base pressure requirement = 40 - 105psi (static)īase pressure is the fuel pressure measured when the fuel pump is running WITHOUT a vacuum line connected to the regulator. ![]() Radium recommends to use the FPD-XR if you have the space. But the FPD-XR has a wider response range. What is the difference between FPD-R and FPD-XR?Īt 1.98" tall, the FPD-R (green top) is slightly shorter than the 2.60" FPD-XR (black top) allowing it to be used in space-contrained applications. This becomes essential for boosted systems that use a 1:1 rising rate fuel pressure regulator. NOT TO BE USED ON THE LOW PRESSURE SIDE OF MECHANICAL FUEL PUMPS (INCLUDING DIRECT INJECTION ENGINES).Īlong with having the flexibilty of using common fittings, Radium Engineering FPD's use a vacuum/boost reference port which allows for proper fuel pulse damper performance even at elevated fuel pressures. The use of an inline damper is great for applications where there is not an option for direct fuel rail mounting. Most high performance OEM engines use an in-line fuel pulse damper from the factory including the Toyota 2JZ-GTE, Nissan VQ35DE, Subaru EJ20/EJ25, etc. Furthermore, a fuel pulse damper can help solve erratic lean air/fuel ratio spikes, commonly experienced as "stumbling", that are difficult to tune out. This correction can be measured throughout the RPM range and can often help idle surge, especially with high flow injectors. ![]() The FPD's internal diaphragm will absorb oscillating pulses and stabilize fuel pressure. Use our fitment tool to find the regulators and kits built for your ride, and we’ll ship them today so you can do things right the first time and every time.The opening and closing of fuel injectors creates pressure pulses in the fuel rail this can lead to unstable fuel pressure. In order to achieve a safe and consistent rail pressure, a fuel pulse damper (FPD) is often necessary. Our prices are unmatched in the industry, and when you contact us by phone, email or live chat, you get expert advice from people with decades of experience working on cars. That’s why we carry only the best fuel pressure regulators from top manufacturers, along with fuel pressure gauges, regulator adapters, fittings and other accessories to make them work better for you. You even get to choose your fuel line type and regulator color so you have the best combination of function and style.Īt MAP, we know what brings car enthusiasts back, and it isn’t porridge and rocking chairs – it’s the best parts at the best prices with the best service. Our MAP AFPR install kits are put together in-house and include a regulator, gauge, fuel line and everything else you need to monitor and adjust fuel pressure on the fly. Whether you’re looking for an affordable and easy-to-use Blox fuel pressure regulator or a Tomioka Racing Pro Series regulator for upgraded fuel systems, we have something to meet your needs and fit your budget. With aftermarket fuel pressure regulators, install kits and accessories from Modern Automotive Performance, you’ll always be able to get your fuel just right.Īdding an aftermarket fuel regulator allows any gearhead to fine-tune the flow rate to ensure the proper air/fuel ratio, prevent either engine starving or flooding. Adjusting to your new engine reality is essential in order to maximize power and efficiency, especially if you have a supercharger or turbocharger. That being said, any upgrade or alteration to an engine component can change where this fuel pressure “sweet spot” falls. While it’s easy think that more is always better when it comes to fuel, every car engine has an optimal fuel pressure – and as Goldilocks showed us, too little OR too much can be disastrous.
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