Also, as pumps wear in, they generally increase in flow rate. This is due to different testing methods and conditions. Note that our test numbers are not a direct match to what TI Automotive advertises. So only use the F9000285 if you absolutely have to in order to avoid excess heat going into the fuel. The F90000285 outflows the F90000274 by about 8%, but requires about 15% more electrical current (more heat!). In-house back-top-back testing of the three F90000-series pumps here at Radium Engineering resulted in the following performance curve: If you would like to use the F90000285 or F90000295, select the Radium product version "pumps not included" and purchase the pumps you want to use separately. Radium Engineering only offers the F90000274 pre-assembled into products. The "295" does not have a check valve (hence the higher flow) so line pressure immediatly drops when it turns off and it cannot be staged with other pumps, but it works great as a lift pump. The "274" and "285 both have internal check valves, so they can be staged when using more than one in a surge tank or hanger. Ti Automotive has released many F90000-series pumps to the aftermarket over the years, but we are only going to focus on the three most popular: F90000274, F90000285 and F90000295Īll of the F90000-series pumps have the same physical dimensions and same electrical connector, so they can be interchanged with each other in Radium products. part number, stamped right on the side of them, as shown below. Here at Radium Engineering we call these pumps by their official F90000. These names rarely have anything to do with the actual flow rate of the pump and often just cause confusion. These are tricky to talk about because many people use the unofficial slang names given to these pumps, such as the "Hellcat pump" or the "Walbro 450" etc. These gas/E85 compatible pumps have a stepped body and come in different flow rates depending on part number. Lets start with our most popular offering, the Walbro F90000-series pumps, officially called Ti Automotive 39/50 DCSS pumps. This article will describe each pump and provide information so you can choose the right pump (or pumps) for your application. We have chosen to offer the highest performing pumps from the most reputable companies. There is no rubbing or interference from the suspension by running it this way.At Radium Engineering we design our surge tanks and fuel pump hangers around popular aftermarket fuel pumps from Walbro (aka Ti Automotive) and AEM. Our Subaru WRX/STI surge tank kit hoses run up and over the rear subframe and into the tank. Here is a photo from under the car showing the fuel tank side of the plumping. Here you see the plumping to the Walboro 400 fuel pump. The hoses on the left side route to the fuel pump. From this angle, you can see the wiring leading up the rear of the car to a power source. Two hoses enter the rear from the tank (right side leads). It made the most sense when taking into consideration the wiring for both the power and the plumbing for the cars gas tank.
#Radium gas tank free#
We are in the final stages of R&D on a complete kit which will include this Radium Surge Tank along with all of the necessary fittings, hoses and mounting brackets for a pain free installation! Enough of the technical information, here are the pictures! We mounted this Surge Tank horizontally in the trunks spare tire recession. If you're contemplating a WRX / STI surge tank stay tuned. A sudden lean mixture condition at high speeds could result in serious engine damage, leaving your high performance rally machine nothing but a glorified yard-ornament. This is particularly dangerous with a turbocharged engine like the one in the Subaru WRX. In that moment, the injectors would be getting no fuel and the engine would cut out.
EFI car pump runs at very high pressure and the fuel is circulated to the fuel rail and back very rapidly, and if the pickup becomes uncovered momentarily, the pump could draw in air and purge all of the fuel from the entire system.
The purpose of a fuel surge tank is to prevent your Subie from fuel system starvation when running at a low fuel level, under hard cornering, or drag racing. Below are a few photo's highlighting the installation process.
#Radium gas tank install#
You'll need some wiring skill, but otherwise it's a simple design and the install is as simple as running a few fuel lines and drilling a few holes for the optional mounting bracket. It is a relative straight forward install, and was done in a short amount of time. Recently we performed a Radium Engineering fuel surge tank installation on a 2005 Subaru STI at our Minnesota based performance shop.
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