Mandated by the FiA, fuel cell foam is used both as an explosion suppressant as well as baffling. This reticulated foam is manufactured from polyurethane and meets MIL-DTL-83054C Type-II. At 15 pores per inch (nominal), it displaces only 0.07 gallons (or 9oz) of fuel per foam piece. Benefits include:

• Limits fuel aeration for starvation protection insuring constant delivery to the pickup
• Keeps weight transfer to a minimum during cornering, acceleration, and braking
• Displaces fuel vapors, reducing explosion potential

After every race season, inspect the condition of fuel cell foam and replace at least every 3 seasons. While it was designed for longevity in hydrocarbon fuels, Radium has also performed thorough testing with high content alcohol fuels (ethanol and methanol). These test have shown no signs of foam deterioration. However, it is advised to do more frequent inspections as alcohol could potentially shorten the foam life span.

NOTE: All Radium Engineering fuel cells come preassembled with this exact foam.

• Radium RA Series Fuel Cells
• Universal for any fuel cells or tank

To install into a Radium fuel cell, simply insert the foam into the 6x10 oval opening and work the foam into place. Some cutting of the foam blocks is necessary for certain sizes of fuel cell. The old fuel cell foam can be used as a reference on how to cut. Some information is below.

Radium 6 gallon fuel cell

• Quantity Required: 2
• Modifications: Cut each end 4.95" (126mm) shorter

Radium 10 gallon fuel cell

• Quantity Required: 2
• Modifications: None

Radium 10.5 gallon spare tire fuel cell

• Quantity Required: 2
• Modifications: Cut each piece in 3 sections

Radium 14 gallon fuel cell

• Quantity Required: 3
• Modifications: Cut 1 piece in half longways

Radium 22 gallon fuel cell

• Quantity Required: 5
• Modifications: Cut 1 piece in half longways