PE Racing PEDAL BOX
Here's our new Award Winning Billet design which was released at PRI-2018, NOW AVAILABLE for purchase.
See our Press Release here
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Floor Mount Bias Pedal Box (Manual version shown)
The Ultimate Pedal Box by PE Racing,
Lightweight and Engineered to withstand superior loads,
Hand built Fabricated or Billet versions using Aircraft materials,
High quality, proudly Designed & Fabricated in Australia.
- Lightweight, Reduced weight improves performance.
- Strong, looks can be deceiving, built and tested to withstand what drivers/motor sport demands.
- Reduced mounting loads via dual pivoted feet (further reduces the overall installed weight).
- Engineered to conveniently fit to a range of floor / bulkhead angles.
- Adjustable pedal faces allow tuning to suit a drivers style, improving driver efficiency.
- Engineered for brake modulation, braking & corner entry become a drivers advantage.
- Compact clever design reduces vehicle modification & installed weight (see Video by Dylan Sharpe Racing).
- Innovative throttle design, precise control in corners become another drivers advantage.
- Unique throttle linkage & pedal design allow easy tuning to suit a drivers style & engine power.
- Optional Drive by Wire DBW Throttle system (refer specs)
Engineered for Motorsport & Individually Constructed Vehicle applications.
Kits can come COMPLETE, assembled & tested (as shown in photo above):
Each complete Kit comes with Quality Master Cylinders, Remote Mount Reservoirs, Braided Lines, Fittings & the Remote Bias Adjuster Cable & Knob
Downloads & Pricing
Specifications & Part Numbers
BILLET 3 Pedal Kits (Specs & Part Numbers)
BILLET 2 Pedal Kits (Specs & Part Numbers)
FABRICATED 3 Pedal Kits (Specs & Part Numbers)
FABRICATED 2 Pedal Kits (Specs & Part Numbers)
Price List (USD) Note that Australian Sales attract 10% gst.
Intro Video 2 min
Full Video 7 min
Installation TC & Warranty
Brake System Component Selection
We offer a design analysis service which identifies critical relationships, selection & settings of brake components to suit your car & application.
Download this spreadsheet, complete & return by email.
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Or call us on 0415 586 890 (International +61 415 586 890).
Features in MORE Detail
This universal pedal box is an adjustable lightweight design, utilising high strength aircraft alloy construction, anodised finish, universal fitting design using adjustable mounting feet (pat.pend), adjustable pedals (pat.pend) with maximised mechanical advantage, built in brake balance technology, and adjustable throttle linkage geometry (pat.pend).
The design eliminates the need for extra weight, which may result from the addition of stiffening required for many floor mounted pedals.
The full kit comes Complete with Frame, Levers, Pedals, Gas/Throttle Linkage System, Remote Brake Bias Adjuster Cable, Quality Motorsport Master Cylinders, Quality Reservoirs, Fittings and Braided Feed Hoses in one efficiently designed Pedal Assembly.
Kits are available in both Manual & Auto configuration, drawings & specifications show both Manual & Auto versions for either Cable or Drive by Wire Throttle applications.
With lightweight, high strength alloy TIG welded construction, the universal pedal box manual version weighs in at only 4lb 7oz (2 kg) excl master cylinders and 7lb 11oz (3.45kg) complete. Alloy master cylinders weigh around 11oz (310g) each depending on bore size. It is designed to satisfy design and strength requirements that motorsport demands. The assembly has been developed using the latest CAD modelling software & FEA simulations. This process was vital for the development of the mountings, efficient frame design, pedals, adjusters and related components. It has been designed and manufactured to withstand high temperatures and loads.
Easy Mounting (Pat.Pend)
Mounting is easily achieved via the adjustable feet at both ends. This feature is aimed to spread the loads over a much greater span area, resulting in overall lower installation weight and lower floor stresses. Eliminating the need to add extra material required to stiffen your floor or foot well of many vehicles.
Mounting options will suit the variety of floor & foot well configurations found in typical unibody vehicles, including mounting to a floor/bulkhead combination of a formula or full chassis type vehicle. Longitudinal adjustment like a floor mount unit is still possible when the mounting feet are fixed parallel to each other. Typical floor mount units require extreme floor rigidity due to the small concentrated mounting area provided. This usually requires additional stiffening of the mounting area by the addition of material and results in unwanted extra weight.
Pedal Adjustments (Pat.Pend)
Pedals are designed to be independent of the levers, so adjustments will not effect the mechanics (master cylinder integration or linkages). Featuring adjustable pedal geometry for feel and comfort, once the kit is installed in the desired location at your selected incline angle, the desired pedal face positions can easily be set using the inbuilt adjustment slots. The mechanical advantage can also be increased by raising the pedal faces up or decreased by lowering them down.
Gas / Throttle Adjustments (Pat.Pend)
Features inbuilt spring return and easy adjustment of the linkage geometry. Once installed, the linkage is easily adjusted to achieve the desired cable stroke. The cable stroke length is achieved via moving the adjustable rod along the slot in the cable linkage. Very fine settings can be achieved ranging from 30mm to 55mm stroke. The adjustable rod with rodends allows fine motion ratios to be set to tune your gas throttle progression requirements. The gas / throttle pedal lever features an inbuilt stop in both directions. A permanent travel stop should be fitted to your vehicle on installation. The desired pedal face position can easily be set using the adjustment slots provided.
The DBW (Drive by Wire) version includes an adjustable linkage with a non-contact Dual Output Potentiometer.
Balance Bar with Remote Bias Adjuster
Remote brake bias adjustment. Our large 7/16″ balance bar operates on the principles of efficient force distribution to the front and rear master cylinders via pivoted lined bearings. The brake bias can be adjusted using the remote cable adjuster provided. If the remote cable adjuster is not desired, it can be replaced with locking nuts at your desired brake bias setting.
Clutch Lever (Manual version)
The clutch has an inbuilt lever stop high within the frame, minimising the risk of fouling by debris. The desired stroke or fluid displacement is easily adjusted to suit by selecting the appropriate cylinder bore and setting the pushrod length for adjusting the effective pedal stroke. The desired pedal face position can easily set using the inbuilt adjustment slots.
Mechanical Advantage with less than 4:1 Pedal Ratio - How?
The challenge we set ourselves was to reduce the overall size of the pedal assembly. We worked on achieving equal fluid pressure & displacement to suit a wide range of motorsport diciplines. This physical size reduction would aid in further weight reduction, whilst allow fitting in tight spaces, and assist in clearing such items as steering columns.
How does a smaller Pedal Ratio work?
The output fluid pressure & fluid displacement is no less than other high quality systems which utilise higher pedal ratios.
How? The overall mechanical advantage is made up of several factors, mainly being mechanical advantage (the pedal ratio) & hydraulic advantage (the hydraulic ratio).
The pedal ratio, pushrod efficiency, master cylinder travel & master cylinder bore all have an effect on the overall output fluid pressure & fluid displacement. This design uses a combination of reduced pedal ratio, and increased hydraulic ratio, the combined result is fluid pressure & displacement being equal to other high quality systems, just in a more compact way. We consider this a win/win.
So pedal boxes with higher pedal ratios are not necessarily yielding a higher overall combined mechanical advantage or better efficiency. This is typically due to shorter stroke and larger master cylinder bores being used, ultimately the combined mechanical advantage remains unchanged.
The Racing Pedal Box by Perusic Engineering is designed to use smaller bore & long stroke masters than in many other quality systems. Our design accepts "Girling Non-Integral Master Cylinders" , or Willwood's "Compact Remote Reservoir Master Cylinders" with 1.375" stroke. The Girling masters have 1.375" travel as opposed to 1.1" in many other quality systems. Our combination of longer stroke and smaller bore allows the pedal ratios to be reduced as a result, without compromising the overall mechanical advantage gained.
Why not use the Trunion pivoted style cylinders?
As our pushrod is designed to work extremely close to the master cylinder's axis, the need for a pivoting cylinder is eliminated.
With other high quality systems, the pushrod angle is effected by pedal/lever positioning adjustments, but not in our case.
With other systems, once pedal adjustments are made, the force/pressure curve can become parabolic in nature, this generally leads to irregular bias proportioning & poor brake pedal feel.
Our pedal lever is designed to not effect the pushrod alignment when making pedal adjustments.
The pedal adjustments on the PE pedals are independent of the levers (all levers), thus eliminating pushrod deviation from the intended axis of travel.
This design also provides for a very close to linear force/pressure curve, providing consistent bias proportioning & improved driver feel.
A variety of cylinder bore sizes are available (5/8”, 0.7” or 3/4” ). The pedal travel can be varied by pushrod length adjustments. The pedal levers can be adjusted for minimised stroke (shortening the pushrod) or to go to a maximum travel of 35° for increased travel, but care should be taken to ensure no binding occurs within the master cylinders at the higher pedal travels. Increasing pedal travel increases cylinder stroke improving an overall mechanical advantage on the clutch lever. Decreasing master cylinder bore sizes further increases the overall mechanical advantage for both clutch and brake levers.
Brake Balance, What's Important?
Initially there are several variables which, when understood enable you to refine your brake balance settings effectively.
The variables are, master cylinder bore sizes for front and rear, balance bar position, caliper selection (total piston bore areas) for front and rear, brake pad material & pad area, brake rotor diameter and thickness. All of these elements are important and the relationship between them is important to understand. Consult a professional as necessary prior to committing to calipers, rotors and pads. Any homework done early in the design stage of your braking system will reduce any unnecessary expense.
Generally many vehicles transfer so much weight to the front under heavy braking, that as much as 80% of front braking effort is required, leaving 20% for the rear. Your particular vehicle may only transfer 65% to the front, so again, doing a little homework at the early design stages is vital to obtaining the correct brake components. Also, keep in mind the operating temperature of your braking system.
It is important that both front and rear brakes have the same temperature gradient at all times. This will ensure regular & predictable front to rear braking forces are present. A poorly designed braking system will lock the fronts at some times and lock the rears at others. This can typically be a result of incorrect operating temperatures relative to each other. Seek professional help as required.
Brake System Component Selection
We offer our customers a design analysis service, obtaining the ideal combination of master cylinders, rotors, calipers & brake pads. Why? To maximise the dynamic braking grip level available, based on your specific vehicle characteristics. Feel free to download our Brake System Design Analysis Form, please return by email.
Terms and Conditions
PLEASE READ THE TERMS & CONDITIONS BEFORE PURCHASE / INSTALLATION
(CONTAINED IN THE FRONT OF “INSTALLATION INSTRUCTIONS”)
More Info & Photos
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