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98-1203 _firewall pedals_ _Page 1_


  • pg 1
									                            Firewall-Mount Pedal Assemblies
A. Description
The TIlton Firewall-mount pedal assembly has been designed to provide the driver with
the greatest control and comfort from a swing-style pedal assembly. The 6.2 : 1 pedal
ratio delivers the optimum pedal profile. Firewall-mount pedal assemblies are NASCAR
approved and the master cylinders are mounted in the engine compartment, as
mandated by thier rules.

Welded steel pedals provide the strength and durability to handle the most severe
braking conditions. The pedal assemblies with dual brake master cylinders include the
balance bar assembly in the brake pedal. The balance bar allows the crew to adjust the
brake pedal force distribution to the dual master cylinders. This system can be used to
compensate for fuel load changes, tire wear, and changing track conditions.

The Remote Brake Bias Adjuster is also available as an option. This connects to the
balance bar and allows the driver or a crew member to make balance bar adjustments
with a flick of the wrist.

Fluid reservoirs can be directly mounted to the master cylinders or can be remotely mounted based on your application.
It is important to follow these setup instructions closely to realize the benefits of this design.
 Installation Notes
 •   Securing the pedal frame to a cross-member will greatly enhance the stability of the pedal assembly.
 •   The mounting location should suit the driver and also provide a stable platform.
 •   Be sure that there is no binding during the full stroke of the master cylinders when the pedal is depressed.
 •   The balance bar mechanism must clear all obstructions when the balance bar is adjusted to the extreme right or left-of-center.
 •   If you have decided to remotely mount the reservoirs, select the location for the reservoirs before starting installation.
 •   This is a gravity fed system, so the reservoirs must be located above the master cylinders.
 •   Attention must be paid to the routing and location of the hydraulic lines. Avoid heat sources such as exhaust pipes.
 •   Accurate clutch pedal setup is critically important. Improper clutch pedal installation and/or adjustment can result in expensive clutch damage and
     DNFs at the track!

B. Installation (Refer to Diagrams 6, 7, 8 & 9 for examples of mounting styles)
1. Trial fit the pedal assembly into the vehicle and note any adjustments that are needed.
2. Make sure that there is enough firewall clearance to allow at least 1” of stroke for all master cylinders. This can be
    accomplished by maintaining the minimum distance from the firewall to pedal, shown as Label A in Diagram 1.
3. It is important to mount the frame rigidly so it does not move when heavy pedal force is applied.
4. Refer to Diagram 1 based on your particular pedal assembly and mark the mounting hole locations in the
5. When satisfied with the mounting locations, drill the mounting holes into the frame members.
6. Install the pedal assembly into the vehicle using the hardware provided in the kit.
7. Install the master cylinders onto the pedal frame and secure them using the serrated flange nuts provided in the kit.
8. Install the Brake Bias Adjuster, if applicable, referring to the Brake Bias Adjuster installation instructions provided in
    the kit.
9. Install the remote-mount reservoirs into the vehicle if this is the configuration chosen.
10. Install the brake and clutch hydraulic lines using 3/16” hard line or AN3 steel braided lines.
11. Refer to the master cylinder instructions for the reservoir mounting and bleeding procedures.
C. Brake Pedal Setup
1. Thread the jam nuts all the way onto the master cylinder pushrods.
2. Thread the pushrods into the clevises on the balance bar assembly.
3. Adjust the pushrods evenly until the brake pedal is setup according to Diagram 1. This is a good starting point that
   may need adjustment to fit the driver.
4. Refer to the balance bar installation instructions to perform the balance bar setup. Be sure tighten the pushrod jam
   nuts against the clevises.
5. The clevis-to-clevis center distance must be maintained at 2.63” when using the 7/16” diameter balance bar.
D. Clutch Pedal Setup
1. Thread the jam nut that is included in the kit all the way onto the master cylinder pushrod.
2. Determine where you want the clutch pedal to be in relation to the brake pedal when the clutch pedal is in the
    relaxed position. This will vary based on the driver’s requirements.
3. Thread the pushrod into the rodend on the clutch pedal until the pedal is in the desired position. Tighten jam nut
    against the rodend.
4. You may need to shorten the pushrod for certain positions.
5. Connect the hydraulic line to the master cylinder.
6. Prime the clutch master cylinder by filling the master cylinder reservoir with brake fluid. Do not use a silicone-based
7. Open the bleed fitting at the master cylinder.
8. Gently depress and release the clutch pedal until fluid emerges. Do not stroke the master cylinder past 1” during
    this process.
9. Tighten the bleed fitting.
10. Fill the reservoir with brake fluid. Do not use silicone-based brake fluid.
11. Place a light force on the pedal such as three pounds. You want enough to hold the bearing out against the clutch
    diaphragm spring but not enough to compress it.
12. Open the bleedscrew for the hydraulic release bearing.
13. Completely stroke the pedal.
14. Close the bleedscrew.
15. Let the pedal return to its natural position and wait four seconds.
16. Repeat steps 11-15 until all air is removed from the system.
17. With the bleedscrew closed do not stroke the master cylinder once the process is complete.
18. Proceed directly to setting the pedal stop before stroking the pedal again or the clutch could be damaged
     See master cylinder instruction sheet for bleeding brakes.
E. Clutch Pedal Stop Setup (For use with Tilton style hydraulic release bearings)
1. Raise the vehicle onto jack stands or a hydraulic lift.
2. With the engine off put the transmission into 1st gear and have someone attempt to rotate one of the drive wheels.
3. Depress the clutch pedal slowly until the clutch disengages and the drive wheel can be rotated.
4. Note the clutch pedal position at this point. This is labeled A in Diagram 2.
5. Adjust the pedal stop bolt to allow an additional 1/4” of pedal travel at the foot. This is labeled as point B in
   Diagram 2. Secure pedal stop bolt with jam-nut once positiion has been set.
6. Adjust the pedal stop so the pedal cannot travel past point B.

F. Maintenance
Periodic inspections of the brake and clutch pedal assemblies should be conducted routinely. Pay particular attention to
the balance bar and pivot areas.


                                                                                                        B          A

              Diagram 1 - Brake Pedal Setup                              Diagram 2 - Clutch Pedal Stop Setup

                        25 Easy Street • Box 1787 • Buellton, CA 93427 • USA • (805) 688-2353 Fax (805) 688-9407

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