Mazda RX7 FD3 Paddle shift 13B 2-rotor Peripheral Port and HKS T51R turbo

Demonstration of the AVR Performance paddle shift system.
The AVR gear shift system utilises the gearbox control functions available in all Motec Hundred series ECUs and is based on a pneumatic system.

The Mazda RX7 circuit car in this case is fitted with a Holinger H6S 6-speed sequential dog box.

Driver shift requests are sent from the steering wheel mounted paddles to the Motec ECU which times & coordinates the appropriate outputs for the shift.

For up shifts the ECU activates an ignition cut along with a coordinated output signal to a solenoid to fire an air cylinder/ram connected to the gearbox shifting mechanism.

For down shifts the ECU activates an air ram via a solenoid to blip the throttle and again times the firing of the solenoid to activate the air ram connected to the gearbox's shifting mechanism -- the clutch is not used for the downshift. A benefit of this is the braking is not upset by having to heel/toe.

By removing the driver from the physical shifting process the shifts are properly timed every time which is good news for the durability of the gearbox.

The upshifts measure consistently at 60ms -- to put that into perspective that's 10 engine revolutions with the engine operating at 6000 rpm. The throttle remains flat for the length of the straight with no discernable dips in the boost with each gear shift.