VR Conditioner

VR (Variable Reluctance) Conditioners take the semi-sinusoidal signal generated by VR sensors and outputs a (typically) 5v square wave that can be interpreted by modern ECUs. There are many variants, including hardware built into ECUs, add-in boards, and OEM standalone styles.

Discrete

"Discrete" conditioners generally use specific components to build-out a signal filter to generate the needed wave form.

Examples

Built in uaEFI module

MAX9924/9926

Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated.

"JDM" Conditioner

Typically contains special hardware to handle the "weird" signals of certain Japanese crank sensors common on Toyotas and Hondas.

HEI 7/8

THE HEI 7 OR 8 IGNINTION MODULES WERE MADE BY GM IN THE 90S AND ARE GODS OWN VR CONDITIONER. ALSO KNOWN AS SILVERBACK BANNANA OR JUST USE THIS ONE.

HEI 7

Typical use is to use the 12v/ground, VR pins, and only the signal out to condition (Pin R) VR sensors, not the actual ignition modules. The HEI 7 uses spade terminals of ?? size.

Pinout

B - Bypass Mode (used for dwell control, typically unused)
R - Reference - 5v square wave, hall input on ECU
E - Dwell control from ECU (typically unused)
N - VR Sensor Negative -
P - VR Sensor Positive +
+ - 12v, Battery (And coil positive if using)
C - Coil negative (typically unused)

Part Numbers

Reference part number is lx315 and can be found via many sources

Speeduino Socket

Many modules follow the 'Speeduino' style of pin layout which is a DIP-8 socket format.