Radium 1993 - 2002 Mazda RX7 FD Fuel Hanger Surge Tank (Pumps Not Included) Walbro F90000267/274/285

The Radium Engineering fuel surge tank hanger can be used with up to three aftermarket high pressure pumps and 1 lift pump in the stock Mazda FD RX7 fuel tank. The unique integrated 1.85L surge tank completely eliminates fuel starvation. No grinding, bending, or modification of the trunk floor sheet metal is required./p>

A fuel surge tank (FST) is the best solution in preventing fuel starvation. Because the FD RX7 can experience high lateral G-forces, it inherently suffers from fuel slosh. Fortunately, Mazda manufactured a gas tank with a very large bolt flange pattern (similar to the FCST) permitting various upgrading options.

The returning low pressure fuel from the regulator is sent back into the FST keeping it full. A second 24 hole deflector is used in this location further preventing air bubbles and foaming. All of this happens inside the OEM gas tank.