KNOWLEDGE BASE · 11 ARTICLES
Setup & adjustment
Mounting, cabling, calibration and every adjustment with torque specs.
Mounting & first assembly
From the box to bolted down on your rig.
PurrPRO FORMULA PEDALS
- Mounting the side footrestsThe box contains 2 left + 2 right side footrests, unmounted. They fit either side of the pedal face — choose the higher or lower side wall per…
- Mounting to a rig — pedal plate vs 8020 profilePedal plate: bolt from underneath the plate into the M6 threaded holes in the pedal foot, using M6 bolts + washers. No disassembly needed if you can reach…
Connecting & calibration
Cabling, PurrOS calibration and in-game setup.
PurrPRO FORMULA PEDALS
- Cabling — the correct orderPort note: on the brake, the Molex connector on the USB-C side is always recognised as PurrPRO THROTTLE; the connector on the other side is reserved for…
- Calibration in PurrOS — step by stepDownload PurrOS from fatblackcat.io/downloads and install.Open the Pedals tab → you'll see Clutch / Brake / Throttle sections (clutch inactive until…
- In-game calibration (iRacing etc.) — do it once, full rangeNever "tune" the pedals inside a game. When a sim forces a calibration wizard (iRacing does), simply press each pedal through its full range (0–100%, i.e.…
Pedal adjustment
Set the pedals to you, not yourself to the pedals.
PurrPRO FORMULA PEDALS
- Pedal base angle (18° range)Loosen the front two bolts first (they form the rotation axis), then the rear two, and tilt the whole pedal within the 18° range. Indents help you index the…
- Active Heel Support height — by shoe sizeLoosen (don't remove) the single M6 bolt and slide the A.H.S assembly; lock into the 10 mm indents. Bolts have light threadlock from factory (Loctite 222) …
- Pedal face angle (N.T.P.F / ERGO-LINK)The Non-Tilt Pedal Face keeps a constant face angle through the stroke. Optimise for the top 70–100% of pedal travel, not the resting position. To change…
- Throttle: travel, stiffness, preload, dampingTravel: loosen the M4 bolt on the side of the base (don't remove) and move the slider. Positions: 1 = 35 mm, 2 = 54 mm, 3 = 73 mm, 4 = 91 mm at the top edge…
- Brake: springs, 3rd stage, twin dampersBrake feel = nominal spring stack + optional 3rd-stage damper-spring combo. Up to 130 kg+ of pedal force in normal setups — from soft road car to…
Brake spring combinations
Recommended brake spring setups by car class.
PurrPRO FORMULA PEDALS
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