E30 Spare Tire Radium Fuel Cell Mounting Kit

Overview

Inspired by the E30 DTM Group A race cars, we designed a modern fuel cell solution to pay homage to the era of racing that birthed the legend of the E30 M3. By mounting the fuel cell inside of the spare wheel well, just like the historic race cars, the weight is moved farther back, which can assist in the addition of rear-end grip, especially for vehicles running stiff race suspension and true rear coilovers.

Using the Radium Engineering spare tire fuel cell (Part number 20-0611 R11A) we are able to install the fuel cell bracket without any cutting of the trunk or spare wheel well being required. The 10.5-gallon fuel cell drops in perfectly to the stock spare tire wheel well with a nice 1-inch gap between the fuel cell and the walls of the wheel well. The only modification required will be to remove the spare tire mounting stud; this can be done easily by using a spot weld remover.

By keeping the fuel cell inside of the spare tire wheel well, the fuel cell is protected from all sides and not exposed to rocks and debris, which could otherwise hit the fuel cell as is common in most other applications that require the trunk floor to be fully removed.

Specifications

Details of the E30 Spare Wheel Well Fuel Cell Mount

• Fuel Cell Mount: laser cut lightweight aluminum
• Remote Mount Fuel Filler Bracket: laser cut and bent stainless steel
  • Design: Designed to mount to OEM trunk latch bracket.

Fitment

• Fuel Cell Fitment: Designed to work with Radium Engineering spare tire fuel cell 
  • Part number: 20-0611 R11A (Not Included)
• Fuel Cell Surge Tank: Radium Engineering FCST-X, non-fuel cell surge tanks are not compatible
  • Part Number: FCST-X (Not included, multiple surge and lift pump options available depending on your power level)
• Fuel Filler: Radium Engineering Remote Mount Fuel Filler, also compatible with Radium dry-break
  • Part Number: 20-0527 (not included)

Installation

Mounting the bracket and fuel cell

Step 1: Remove the spare tire mounting stud by drilling out the two spot welds that hold it in place. 

Step 2: Bolt our mounting bracket to your fuel cell and center it inside the wheel well. Note: The outer silhouette of our bracket follows the OEM stamping of the trunk floor, making it easy to center the fuel cell

Step 3: Mark the holes for mounting the fuel cell bracket to the trunk.

Step 4: Drill the holes and fasten the fuel cell using the supplied nuts and bolts to fully secure the fuel cell to the trunk.

 Step 5 (Optional): Use weather liner to create a nice water and air seal, which will also act as a vibration dampener for the fuel cell. 

Mounting the Fuel Fill Bracket

Step 6: Locate the two small existing holes on the trunk latch bracket.

Step 7: Use a 1/4" dill to enlarge the holes.

Step 8: Use the supplied M6 hardware to mount the fill bracket to the trunk.

Once installed, you should have a snug and protected fuel cell, with a stealthy and accessible fuel fill port!