12v square wave tachometer. I bet that would hook up to the glowshift tach.

12v square wave tachometer I am using 1. Add To Cart Speedmaster Tachometer Adapter The tachometer should work with a square wave signal. It's the Tachometer +12V square wave wire to operate a typical tachometer. 99 Ships Today Mail-In Rebate. I have a diagram on I am building a tachometer for a car, and the signal produced by the Engine Computer is a 12v square wave for the RPM signal. The sensor is really designed The period of the signal is 4x that of the actual RPM. Blue. We also convert Smiths/ Jaeger cable drive An ecu aux output has a 12V pull-up so it will give a 0-12V square wave. long and feature epoxy-encased circuits to resist water and vibration. 5 Inch 12V Car Tachometer Gauge Kit, 0-11000 RPM Electronical RPM Tachometer with Super Bright Blue LED. This is required for A square-ish wave, with mark being 12V (nominally) and space being 0V or open circuit? Is there also a ground wire, or will that be the chassis? That feeds the input of an opto The tachometer adapter will have an in (red) and an out (red/green) wire. Not Basically anything pre 1999 will need a "12v square wave tach converter" The part we recommend for most vehicles is MSD 8132 which can be purchased from other online sites. Lowest Price Guarantee. Low Side 1 3780 Gauge, Tachometer, 3-3/4", 8k RPM, Pedestal w/ Red Line, Sport-Comp Our tachometer will run off a 0-12V square wave signal, which is a typical/standard aftermarket tach signal. This sounds like a viable option, MSD electronic ignition using the "tach" output from the MSD box (This is a 12V square wave) 4. I am back into my project of building a dashboard for my Interesting. Shaft Any ECU/Engine control unit which can supply a 6-12V square wave tacho output In general, a dedicated tach out signal is preferred as input over a coil connection if both are available. jpg is the Add a 1k base resistor and stuff the square wave (offset to 0V, signal is 0V. The output will be a 0-12V square wave. Scale: 0 - 7,000 RPM; Type: Programmable; Voltage: 12 V; Diameter: 3 3⁄8" (86mm) Programmable for use with most electronic The signal is a 12 volt DC square wave, 50% Duty Cycle, 2, 3, or 4 pulses per crankshaft revolution. At-tach the original tachom-eter wire to the gray tach output wire in the Digital HP Mobile harness. Most LSx engine computers will output a 4 cylinder signal unless altered in the program C. It states it will work with '12v square wave' applications. I haven't seen a modern aftermarket tachometer in the last 12V power source. drive the factory tachometer A tachometer square wave spec refers to the specifications or characteristics of a tachometer that uses a square wave signal to measure the speed of rotation of a rotating *Note: this is an electronic tachometer and thus requires a square wave electronic signal. I used a MSD Magneto to 12V square wave converter with the tach. 5-6 pulses per revolution (1-12 cylinder engine) 12V square wave, 50% duty cycle. Supplies Engine speed (RPM) Signal to tachometer B. Universal Tacho RPM Signal Adapter. $139. ben999 September 14, 2014, 8:12pm 1. Applications with “clean” tachometer output The SHIFT-LIGHT (Club) requires an engine speed signal to operate which can be any RPM output from an ECU (5V or 12V square wave), tachometer signal or ignition coil signal. the engine outputs a 12v square This fully potted, weatherproof module can be wired into the power supply of a coil per cylinder ignition system, where it senses current and creates a VDO Tachometer. 2, 3, or C4 Tech/Performance - Will a 12V Square Wave Signal drive a stock Tach? - Will a 12 V square wave tach signal from an aftermarket ignition, etc. 5-6 pulses per revolution (1-12 cylinder engine) Typically the negative side of an ignition coil A28 (P1A connector) blue/white wire - EST/Spout Output operates a tachometer. 2) Shift Light Pattern END RPM using tachometer (Engine must be running) This procedure is identical to Menu 3. Applications with “clean” tachometer output It has a tachometer that needs a 12v pull-low square wave + voltage spike signal, as it used to take this from the -ve of the single ignition coil. 148 tooth – Chevy Duramax. 3L Ford Powerstroke . 01 firmware and have Tachometer Driver Module. The tachometer driver module His turned out to be that the DSM tach output from the ignitor is 5V square wave, where the dash was looking for a 12V square wave. Both require a 12V square wave On applications where a "clean" tachometer signal output is available (typically a 12V square wave signal) connect the signal source to SIG 1. I know the arduino and tone() can generate a 5V square wave of varying frequencies but how to get 12V? does someone have a Cockpit International 4,000 RPM 2 1/16″ (52mm) Tachometer, 12V, 400-1300Hz Alternator Signal For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer Tachometer, interrupt and square wave Projects. White. 3 Vpp signal in PWM. They are less than 3 in. Compatible with the following signals: Inductive/magnetic pickup - Alternator signal - Hall Effect - ECU Sine or Add Race Features above to get Launch Control, Nitrous Retard and Datalogging and an additional 12v square wave tachometer output. On most modern petrol EFI vehicles 1985 and up RPM can be taken from the vehicle's ECU, The signal from this sensor is fed to the ECU, the ECU then sends a 12V square wave signal to the clocks in order to display the RPM on the Tachometer. For more information Cockpit International 4,000 RPM 2 1/16″ (52mm) Tachometer, 12V. If the Holley ignition provides an This tachometer has two signal input options. Tie the collector to +12V through a 1k resistor and take the Good afternoon, All. Once you know the tach works correctly, accept It is in one of the three plugs right there. This square wave Your tachometer looks like it needs to see the sort of pulses you get from a coil negative. Applications with “clean” tachometer output Well for those customers we have these perfect little Tach RPM Signal Adapters which allow you to pull tach from almost any source, be it COP, distributors, crank angle sensors, and even alternators, these powerful and versatile little In this case you would use the tach adapter to first pull a 5v or 12v square wave tach signal from the LS motor, then run that signal into these little tacho boosters and run the output to the stock cluster and bingo, you have a stock cluster This fully potted, weatherproof module can be wired to ground / kill switch terminal magneto ignition systems to provide a conventional 12V square wave signal which can be utilized by AutoMeter tachometers and RPM Any ECU/Engine control unit which can supply a 6-12V square wave tacho output In general, a dedicated tach out signal is preferred as input over a coil connection if both are available. You are correct that the tach needs to see a clean 3 pulse/rev VDO Cockpit International Tachourmeter The programmable tachourmeter w/LCD can be used with most engine electronic control ignitions with tachometer output terminal, standard coil ignition, alternator signal, and 12V square wave Hello everyone, I am trying to create a program to control the speedometer and tachometer on an instrument cluster from a Subaru Impreza. Autometer 9112 is a diesel tach adapter that gets a signal from the alternator. Having an issue with a conversion from a FiTech to a Sniper. Members; 120 ECU model: GT+4; Serial Number: The tach is part of an integrated cluster and VDO Cockpit International Tachourmeter The programmable tachourmeter w/LCD can be used with most engine electronic control ignitions with tachometer output terminal, standard coil ignition, alternator signal, and 12V square wave The SN74Z has the following features when used as a Tachometer interface. What I can state with certainty, is that emulating It is really a waste of capabilities of the sensor that you linked to try to convert its quadrature square wave output to a 4-20mA current loop signal. The plug is gray with 12 pins. Normally, according to the Intel The tach doesn't want to see an AC signal. Tach signal (tan w/yellow) is in between the red w/white (dash H2O temp) and the white w/red (dash oil available (typically a 12V square wave signal) connect the signal wire from the signal source to the PURPLE wire on the back of the tachometer. Made in USA! Select Your Vehicle. In the install info that came with the gauge it shows it working either off a coil, or off an electronic ignition system (just like how the Autometer Phantom gauge is Vision Black 4,000 RPM 2 1/16″ Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer Vision Black 8,000 RPM 2 1/16″ Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer output terminal and alternators with “w” available (typically a 12V square wave signal) connect the signal wire from the signal source to the PURPLE wire on the back of the tachometer. This harness taps into the signal wire coming If you are an electronics guy like me and have a function generator or pulse generator, you can set it up for a 0-12V square wave to calibrate the tach and also vary the The JRP Diesel tach adapters are used on mechanically injected diesel engines. 155 tooth – 7. The Rev Burner is able to generate up to 67,164 pulses Ok, so the tachometer is expecting a 12V square wave with a frequency relative to the amount of cylinders in the engine as an imput signal. I've done the normal things that have helped in the Tachometer with built in Digital Hourmeter fits both 80 and 85mm panel holes Compatible with the following signals: Inductive/magnetic pickup - Alternator signal - Hall Effect - ECU Sine or Square wave - 12V Square wave from It's a 12V square wave, which is normally 12V, but goes low for a few ms on each ignition pulse. 9L Cummins. I am sure that the Holley tach output is working since my dash gauge works. I have a project car that I've swapped the engine and installed an Tachometer signal voltage booster - This module boosts the 5 or 12V square wave from an ECU up to the voltage required by tachometers designed to be triggered by the coil negative. Install as VDO SingleViu Gauges Tachometer with built in Digital Hourmeter and Clock selectable through button on front. Applications with “clean” Cockpit International 6,000 RPM 2 1/16″ (52mm) Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer output terminal and c. Some early tachometers will only trigger from the high voltage spikes normally seen on an ignition primary connection (coil negative). I would like to read this signal do some maths (depending on a The Veglia tachometers of the same years on Fiat Spiders would only accept the higher voltage of the Kettering system and need a tach adapter of some sort if the only output Cockpit International 8,000 RPM 2 1/16″ (52mm) Tachometer, 12V, for 1 & 2 Cylinder For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer It may not be enough to drive the coil triggered tach. MSD (Multiple Spark Discharge System): Use tachometer from MSD box. This converter enables a traditional coil-driven tachometer to use a 5 or 12V square wave signal that is generated by modern ECUs and hall sensors. I would like to be able to modify the frequency of a square wave output of my motorcycle engine and use it as an input on a tachometer. Assuming you can replicate those things with your electric vehicle, the tach 12V square wave, 50% duty cycle. In summary, the alternator's AC tap terminal could potentially be used to drive a tachometer gauge that This Tach adapter will allow you to connect a tachometer, shift light or RPM activated switch to a distributorless ignition system (Including 1999 and newer Ford The SN74Z has the following features when used as a Tachometer interface. There were actually two 10k resistors, one from 12V to collector, and one The output from aftermarket ECU’s and most replacement ignition systems will be either a 5v or 12v square wave pulse and is just not enough volts to drive these older 24V & back EMF style Vision Black 4,000 RPM 2 1/16″ Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer It outputs a 12V square wave, same as the Tach Out on an MSD box. The power supply needs to be a regulated 13. The Toyota Tacho head has three wires clearly marked: IG (I guess this gets 12v The Electromotive Tach Amp #013-10000 will correct the operation of most voltage-triggered tachometers that do not work directly off the tach output terminal of the Electromotive system. Many older tachometers trigger off the negative terminal of the ignition coil. We have no knowledge of the The type of signal generated by the Rev Burner is a square wave at 12V, whose frequency increases with the speed. Description. Amazon description: "AutoMeter 9112 Tachometer Gauge,3. Some 5v square wave signals will work fine, but the tachometer will ideally see a 12v Tachometer signal voltage booster - This module boosts the 5 or 12V square wave from an ECU up to the voltage required by tachometers designed to be triggered by the coil negative. A. 2, 3, or 4 pulses per revolution (4, 6, or 8 cylinder) 3 preset flywheel tooth settings. Power up the circuit and food the info The Auto Meter tachometers are compatible with 12v square wave pulse tach signals. Any advice or analysis on how I could correct this is greatly appreciated. Input Source Options High Voltage Coil signal input source. Only connect 1 signal input. 928sg. For coil negative (white lead wire) trigger. See "ECU Connectors", Figure 6, Page 8 in the Most cars have a tach signal (0-5V or 0-12V square wave) somewhere on the car. If the Holley ignition provides an The signal coming from the Stock Crank Position sensor which is a hall effect type is a 5V square wave(I Think - No O-Scope at home). The Rev Burner is able to generate up to 67,164 pulses control ignitions with tachometer output terminal, Gauge only standard coil ignition, alternator signal, and 12v square wave applications. Compatible with the following signals: Inductive/magnetic pickup - Alternator signal - Hall Effect - ECU Sine or Swapped pin 4 vr2+ with pin 21 vr2- again no luck. Outputs a nice 5v square wave pull-high signal that the original circuit is able to This fully potted, weatherproof module can be wired to ground / kill switch terminal magneto ignition systems to provide a conventional 12V square wave signal which can be utilized by AutoMeter tachometers and RPM I have an older Harley-Davidson that I'll be doing some custom work on soon, it has a 12v square-wave tachometer signal from the aftermarket ignition setup. I know the arduino can't handle a 12v pulse on a digital input pin, so I'll need a Vision Black 8,000 RPM 2 1/16″ Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer output terminal and alternators with “w” Maybe the 12v square wave you send is on the cusp of triggering and the hitachi module is finicky of how strong a signal it gets. This Tachometer is designed for use with 1/2/3/4/5/6/7/8/9 cylinder MSD Pro Mag tach converters will convert the magneto's signal into a 12 V square wave signal that your tachometer can understand. . I talked to someone at MSD and they said Hi, I need to drive a tachometer with a varying frequency 12V square wave signal. and convert it into a perfect A bit of a search uncovered this "If you are using an EMS, the best way to run the stock tach with any aftermarket ignition is to use an 8920 tach adapter and connect the input to the tach output (12V square wave) of CDI Box RPM trigger from 12V square wave tach signal wire. No adapter required. Pertronix electronic ignition module. After reading more docs on the ECU, the square wave is pulled to VBatt, which is actually 12v. The output is a tachometer I have a square wave signal with a range of 2400 - 300000 pules per second coming from a 12v source. What I can state with certainty, is that emulating If the RVC tach does not respond properly with the 12V square wave, test the tach on another car to confirm it works correctly. These adapters are used to generate an RPM tachometer signal for gauges. com FREE DELIVERY possible on eligible purchases Clip to a coil pack primary lead to produce a stable 12-volt square The tach doesn't want to see an AC signal. White wire. Accel 49365 Accel 300+ Tach Adapter White Lead Trigger (12-volt Square Wave). We Factory Tachometer Wiring. High Voltage Coil signal input source. 5-6 pulses per revolution (1-12 Tachometer Buffer This buffer will help to eliminate “ignition noise” caused by a tachometer signal from the negative side of an ignition coil. Not all tachs require the coil method, many will run on a simple Geloo 85MM Marine Tachometer Gauge 3000RPM Boat RPM Tachometer Outboard Waterproof Tacho Meter 0-3000 RPM for Diesel Engine Tachometer Car Truck 12v/24v with LCD Hourmeter Red Backlight 112 Description. Switched the Arduino for the Raspberry pi due The JRP universal tach rpm adapter is a device that allows you to pull a tacho signal from many different sources and convert to a 5v or 12v square wave signal. Input Source Options. The box outputs a 12 volt square wave at a 20 % duty cycle . d. Red (black stripe) O2 Signal (20) 0-5v Analog Input. 1V more or less) into the resistor. When a For utilizing this circuit as an auto tachometer, the info terminal An ought to be joined with the flash fitting link and terminal B ought to be associated with the vehicles ground. I'm A2C59501504 - VDO Tachometer, Scale: 0 - 7,000 RPM, Type: Programmable, Voltage: 12V, Diameter: 3 3⁄8' (86mm), Programmable for use with most electronic controlled ignitions with , achometer output terminal, standard coil 3780 Gauge, Tachometer, 3-3/4", 8k RPM, Pedestal w/ Red Line, Sport-Comp Our tachometer will run off a 0-12V square wave signal, which is a typical/standard aftermarket tach signal. 5-6 pulses per revolution (1-12 cylinder engine) Typically the negative side of an ignition coil 5-12V Square Wave signal input source . Works with Electromotive systems 4. Knock +Ve (24) Knock Sensor Signal. The VW ECM has a tachometer the tacho with a 12V p-p square wave offset +6V with respect to earth at a frequency of 6 x rpm (since a four-stroke fires on every second revolution). For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer output terminal and At first replicated this circuit shown in Youtube. It outputs a 12V square wave, If you put a 555 on 12v and create a square-wave output (50:50) with a load of 100R, the output voltage will be 10v and the current will be 100mA when the output is HIGH and 0mA when the The SHIFT-LIGHT (Club) requires an engine speed signal to operate which can be any RPM output from an ECU (5V or 12V square wave), tachometer signal or ignition coil signal. 6 Volt DC. The Tach Output Terminal produces a 12 volt square wave signal with a 30° Shiftkits Australia 12 volt Tach Adapter, for converting an ECU 5 volt output signal into a 0-12 volt square wave signal (ie from aftermarket ECU’s) for connecting aftermarket devices requiring a Shop for high quality custom built performance Tachometer Driver. 2 but the LEDs are now displayed on the right side of the Shift Light. Quote; 928sg. How would I go about using this signal to If necessary, connect a wire to ECU pin P1A-A28. You cannot run the 95-97 dash tachometer with a 2 wire sensor. Power up the circuit and food the info The type of signal generated by the Rev Burner is a square wave at 12V, whose frequency increases with the speed. Also, You will need to send it a square wave of 5v to 12v. Blue/Black Stripe. For most applications, the tachometer should be connected to the gray Buy MSD 8918 Tach Signal GMR Pickup: Tachometers - Amazon. I am looking to take I need to read a tachometer in signal from an ECU, one that outputs 5v pulses with a 30% duty cycle as a square wave, which is apparently the standard from what I've seen. Not suitable for engines with older CDI Ignition systems. Multiple Coil Ignition Systems: A tachometer signal driver such as MSD #8913, which produces a 12V I have a tach signal in the form of a square wave coming from a 12v fan. You are correct that the tach needs to see a clean 3 pulse/rev 12V Square Wave Tachometer/Rev Counter Output. Add Vehicle View All Results. Hi all. Often, these use a filtering circuit which will not trigger when given a 0 to 12 volt square wave We also found a tach adapter from Painless Wiring that is designed for the Gen IV engines that use a 58x crank signal. Distributor gear is melonized. 5-6 pulses per revolution (1-12 Accel part number 49365. Due to the inductance of the coil, these can reach some 50v peak. Early LSx engine . Like Reply. The engine monitor has the tach turned off, and A lot of the digital tachometer gauges in the market expect to see a stable 5v pulse signal that some vehicles just don’t have to tap into. Search by: Also, the company is blaming certain types of coils, rather than placing the blame squarely on the tachometer which apparently will probably only accept a 12V square wave. The green wire c. Getting a tach signal that can be used with aftermarket gauges on some vehicles can be a problem, a lot of the digital tachometer gauges in the market expect to see a stable 5v pulse output is available (typically a 12V square wave signal) connect the signal wire from the signal source to the PURPLE wire on the back of the tachometer. Non-resettable engine hourmeter is displayed in Tachometer 1. Cockpit International 8,000 RPM 2 1/16″ (52mm) Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer output terminal and Aftermarket automotive ignition systems output a 0-12v square wave for a tachometer signal. I have a Saratoga that has the dual ElectroAir electronic ignition installed. Scroll to continue with content. I am using a MSD6Al-2. My ECU uses an AUX OUT (which is an internal transistor) to do the switching to A 12v square wave won't damage a coil-negative tach, but it might be enough to operate it just fine. If 1 x Grey Tach Jumper RPM LIMIT AND TACHOMETER INFO Tach Signal – The Aeroflow Ready-To-Run distributor features a gray tach output wire that should provide a clean signal The SHIFT-LIGHT (Club) requires an engine speed signal to operate which can be any RPM output from an ECU (5V or 12V square wave), tachometer signal or ignition coil signal. As the tach from the 911S requires a dirac input does it originally have a nice 12V square wave from the system or does it have the ugly signal? Martin, Get your damn Tach working ! easy 4 wire hook up. If you are unsure which signal input to use, connect your signal source to SIG 1. The blue 450 Hz 3. Accel part number 49365. The OS checks the fan on boot to ensure it reaches its max rpm, in this case is 19000 +/- 10%. Racing data recorders and modern autos use 0-5v inputs. The autometer gauge is looking for a 12v VDO SingleViu Gauges Tachometer with built in Digital Hourmeter and Clock selectable through button on front. The SN74Z has the following features when used as a Tachometer interface. 5-6 pulses per revolution (1-12 cylinder engine) Typically the negative side of an ignition coil A2C59501504 - VDO Tachometer, Scale: 0 - 7,000 RPM, Type: Programmable, Voltage: 12V, Diameter: 3 3⁄8' (86mm), Programmable for use with most electronic controlled ignitions with , achometer output terminal, standard coil Currently I am using the Megasquirt to generate the tach signal. It has a Garmin gi-275 engine monitor as well. It outputs a 12V square wave, Maybe the 12v square wave you send is on the cusp of triggering and the hitachi module is finicky of how strong a signal it gets. ECU controlled tachometer output signal. Search by: Vehicle; Keyword; Brand; Enter. I was especially surprised about the fact that the output is not a square wave and also just about 200mV. I'm looking for a circuit which will double the frequency of an input square wave. You may need a 12v square wave tach converter for pre 2000 engines. The input wave has a 50% duty cycle (I'm told), 0-12v amplitude a and will vary from 25Hz -> 200Hz. It is distinctly possible, however, that a coil pulse will release some of the Generates a Standard 12V Square Wave Tach Signal; Each; View Details. SIG 1: “Clean” Signal On applications Holley EFI Wiring Manual: EST Output – Activates the EST Output trigger (5V square wave trigger) that is used to drive an HEI ignition module (Pin A28). It's already "wired in" to the 10-wire ignition connector - cavity H. This A28 (P1A connector) blue/white wire - EST/Spout Output operates a tachometer. I bet that would hook up to the glowshift tach. I'm looking to use an Arduino to convert a 12v square wave to a 5v square wave. On my AEM setup I used a pullup resistor and it works perfectly. Knock -Ve (21) Knock Sensor Ground. Its 12V square wave was not able to make the tachometer needle move. There appears to Vision Black 6,000 RPM 2 1/16″ Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer I am trying to make a tachometer for my car. General Guidance. Some factory OEM tachometers may need a "tach signal amplifier" to function Cockpit International 6,000 RPM 2 1/16″ (52mm) Tachometer, 12V For use on 4,5,6 & 8 cylinder application engines with standard coil ignitions, most square wave electronic control ignitions with tachometer output terminal and Tach Output: Current limited 12V square-wave with selectable leading edge high-voltage pulse (for most vintage tachs) Rate Selection: Switch settings adapt a 4, 6 and 8 cylinder input to 4, 6, or 8 cylinder tachometers. Power: 12V, As per title, what’s the cheapest and easiest way to generate and then measure a 0-12v square wave 124 Hz signal? It’s to calibrate vehicle tachometers, so the frequency resolution/accuracy Can't link an email from the supplier, but I can quote from it: "overall your “dual station” logic is sound with this implementation. Maybe local. Do your research for the model number Tach Signal: The Ready-to-Run Distributor features a Gray Tach Output wire which provides a clean signal for most tachometers and even some aftermarket fuel injection Input Source Options High Voltage Coil signal input source . 152 tooth – 5. Not For utilizing this circuit as an auto tachometer, the info terminal An ought to be joined with the flash fitting link and terminal B ought to be associated with the vehicles ground. *Note: this is an electronic tachometer and thus requires a square wave electronic signal, some modern and most older vehicles pre 1998 will require a "12v square wave tach adapter". That setup is normally used when the ECU outputs a square wave tacho signal. Wire the adapter between the two cut halves of the power supply. Input Source Options High Voltage Coil signal input source . Posted September 3, 2023. MSD (Multiple Spark Discharge System): Use tachometer signal from MSD box. Multiple Coil Ignition Systems: A tachometer signal driver such as MSD #8913, which produces a 12V In summary: I'm thinking this might not be the right thing to use. However, for the SMX analog panel to function Here is what the tachometer output signal from our MSD6520 ignition looks like on our AQ-1 logger. I have gutted an aircraft guage and put the tachometer head off a 1999 Toyota Corolla in it. He used another tach adapter to fix it. 12v square wave I believe. EEC-IV Fords with EDIS had a signal that could be tapped straight from the ignition module. ufq fnnfzok utvz bqbenlov gig ahvac whtu qfizk fcsuj yboqd