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Ignition Coil

ZeeKay — Mon, 11 May 2026 22:59:34 GMT

"R8" Coils

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	==== "R8" Coils ====		==== "R8" Coils ====
			Bosch coils 0221604800

			OEM unitsmade by Eldor 06E905115G

			NGK U5014

	==== "R35" Coils ====		==== "R35" Coils ====

Idle Air Control Valve

ZeeKay — Thu, 23 Apr 2026 16:06:33 GMT

← Older revision		Revision as of 16:06, 23 April 2026
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	== Ford ==		== Ford ==
	Flanged type, can make small adapter to connect to hoses		Flanged type, can make small adapter to connect to hoses

			Typically 315Hz

VR Conditioner

ZeeKay — Thu, 23 Apr 2026 14:38:11 GMT

← Older revision		Revision as of 14:38, 23 April 2026
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	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.		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. These are not needed for Hall or Optical sensors as those generate square waves natively.

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

	=== ~~Examples~~ ===		=== uaEFI ===
	Built in ~~uaEFI module~~
			==== mck1117 vr-interface ====
			Built in "discrete" input. Based on the lm1815, open source

			https://github.com/mck1117/vr-interface/tree/master

	== MAX9924/9926 ==		== MAX9924/9926 ==
	Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated.		Many VR Sensors are based on the ICs created by Analog Devices / Maxim Integrated. 24 is single channel, 26 is dual channel.

			=== uaEFI ===
			[[File:MAX9924 Diagram.png\|thumb\|MAX9924 Circuit Diagram]]Built in 'VR2/Hall' input

	== "JDM" Conditioner ==		== "JDM" Conditioner ==
	Typically contains special hardware to handle the "weird" signals of certain Japanese crank sensors common on Toyotas and Hondas.		Typically contains special hardware to handle the "weird" signals of certain Japanese crank sensors common on Toyotas and Hondas. Based on lm393.

	== HEI 7/8 ==		== HEI 7/8 ==

File:MAX9924 Diagram.png

ZeeKay — Thu, 23 Apr 2026 14:28:00 GMT

ZeeKay uploaded File:MAX9924 Diagram.png

New page

Typical circuit diagram of a MAX9924 VR Conditioner

VR Conditioner

ZeeKay — Thu, 23 Apr 2026 14:21:19 GMT

@@ Line 29: / Line 29: @@
 * + - 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
+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.
 [[File:Speeduino DIP8 VR Conditioner Pinout.png|thumb|Speeduino DIP8 VR Conditioner Pinout]]

File:HEI 8 Module Wiring.png

ZeeKay — Thu, 23 Apr 2026 14:16:30 GMT

ZeeKay uploaded File:HEI 8 Module Wiring.png

New page

HEI 8 Module Wiring

VR Conditioner

ZeeKay — Thu, 23 Apr 2026 14:11:08 GMT

Created

New page

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 ====
[[File:HEI7 Wiring.png|thumb|Wiring/Circuit diagram for HEI7 ignition module]]

* 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.
[[File:Speeduino DIP8 VR Conditioner Pinout.png|thumb|Speeduino DIP8 VR Conditioner Pinout]]

File:HEI7 Wiring.png

ZeeKay — Thu, 23 Apr 2026 14:07:27 GMT

ZeeKay uploaded File:HEI7 Wiring.png

New page

Wiring/Circuit diagram for HEI7 ignition module

File:Speeduino DIP8 VR Conditioner Pinout.png

ZeeKay — Thu, 23 Apr 2026 14:00:10 GMT

ZeeKay uploaded File:Speeduino DIP8 VR Conditioner Pinout.png

New page

Speeduino DIP8 VR Conditioner Pinout