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TACHOMETER SENSE LINE ATTACHMENTS AND METER SCALING

GASOLINE ENGINES

The WHITE/DIMMER circuit must be installed and supply 3 to 12vdc before the PPR can be 

progammed

Attach the sensing line to the primary side of a spark coil, and then set the calibration PPR value for 

your spark configuration, using directions for the CALIBRATION option.

Once upon a time, there was just one configuration: a spark coil, a distributor, and then wires from the 

distributor cap to the individual sparkplugs. If your car is like this, use the table below:

FOR “CLASSIC” ONE-IGNITION-COIL ENGINES

IF YOU HAVE ONE 

COIL PER PLUG CONNECT TO ANY SPARK COIL PRIMARY

   IF YOU HAVE ONE COIL PER TWO PLUGS CONNECT TO ANY SPARK COIL PRIMARY

DIESEL ENGINES

Modern diesel engines usually have camshaft sensors or electronic injector pumps. If there is one  

injector per cylinder, the signal from the pump drive will be 1/2 PPR. Similarly, if there is a camshaft 

sensor signal the signal will be ½ PPR. Set the calibration at a reading of 500.

If there is no electronic cam sensing or fuel injection in your diesel engine, the procedure is more com-

plex. A signal can be obtained from the alternator by attaching a wire directly to the winding of the sta-

tor before it goes to one of the rectifier diodes. This signal will be proportional to engine speed, but the 

Programming Instructions for : RPM Tachometer

1/16

” Controller

8

# PLUG

2

4

6

8

10

12

PULSES PER  

REVOLUTION (PPR)

1

2

3

4

5

6

METER 

SETTING

1000

2000

3000

4000

5000

6000

# PLUG

Any

PULSES PER 

REVOLUTION (PPR)

1/2

METER 

SETTING

500

# PLUG

Any

PULSES PER 

REVOLUTION (PPR)

1

METER 

SETTING

1000

Summary of Contents for Spek 14820

Page 1: ...PROPARTS DASH INSTALLATION SELECT LOCATION IN THE DASH TO MOUNT GAUGE AND CUT A 2 1 16 HOLE USE A FILE TO INCREASE THE HOLE SIZE IF REQUIRED BE SURE THERE IS SUFFICIENT ROOM BEHIND THE HOLE FOR THE ME...

Page 2: ...PRODUCE 3 TO 12VDC BEFORE THE PPR CAN BE PROGRAMMED 10 CONNECT THE SENSING WIRE TO THE PRIMARY TERMINAL ON THE IGNITION COIL STANDARD TYPE COIL OR TO THE AUXILIARY TERMINAL MEANT FOR THE TACH WIRE AFT...

Page 3: ...E IGNITION POWER AFTER A 20 AMP FUSE USER SUPPLIED WARNING OUTPUT CONTROL MODULE NOT TO EXCEED 1 5 AMPS AT 12 VOLTS DC WARRANTY WILL BE VOID IF INCREASED OUTPUT VOLTAGE OR CURRENT IS APPLIED OPTIONAL...

Page 4: ...SPEK GAUGES AND CONTROLLERS ARE DESIGNED FOR 12V DC ELECTRICAL SYSTEMS WITH A NEGATIVE GROUND DO NOT ADJUST THE GAUGES OR GAUGE PROGRAM WHILE DRIVING OBEY ALL RULES AND REGULATIONS OF HIGHWAY AND STR...

Page 5: ...or user of any products sold or manufactured by ProParts LLC assumes all risk related to and or arising from the ownership or use of said product and agrees to indemnify and hold ProParts LLC harmless...

Page 6: ...ttons move the pointer to a desired setting or controls the faceplate illumination The center Mode button will save the setting you choose and proceed to the next level Pressing the Mode and Up or Mod...

Page 7: ...RACING YELLOW LINE SETTING Set the Minimum RED LINE Sets the point at which LOW warning threshold is reached for that specific gauge The Down and Up buttons will move the dial pointer to select the L...

Page 8: ...EAK warning indicators light The Demo mode does not time out If the gauge is turned off in the Demo mode it will start up in the Demo Mode Press the Mode button to return the gauge to NORMAL operation...

Page 9: ...lly have camshaft sensors or electronic injector pumps If there is one injector per cylinder the signal from the pump drive will be 1 2 PPR Similarly if there is a camshaft sensor signal the signal wi...

Page 10: ...how you need to set the meter When you have figured out what PPR setting you are to use press the Mode and Up buttons simultaneously for five 5 seconds The dial will flash blue rapidly This places th...

Page 11: ...lor scheme OFF VIOLET BLUE GREEN YELLOW ORANGE RED WHITE Press the center button to save and advance to NORMAL OPERA TION NORMAL OPERATION ON POWER UP THE GAUGE READS THE RPM Press the center button t...

Page 12: ...ttons to select PPR value by moving dial pointer to corresponding RPM Press the center button to save and return to NORMAL OPERATION See PPR Chart Page 4 5 OPTION POINTER BRIGHTNESS While in DIAL BRIG...

Page 13: ...NEGATIVE BATTERY TERMINAL 2 VARIOUS MOUNTING SOLUTIONS ARE PRESENTED BY PROPARTS DASH INSTALLATION SELECT LOCATION IN THE DASH TO MOUNT GAUGE AND CUT A 2 1 16 HOLE USE A FILE TO INCREASE THE HOLE SIZE...

Page 14: ...2VDC BEFORE THE PPR CAN BE PROGRAMMED 10 CONNECT THE SENSING WIRE TO THE PRIMARY TERMINAL ON THE IGNITION COIL STANDARD TYPE COIL OR TO THE AUXILIARY TERMINAL MEANT FOR THE TACH WIRE AFTER MARKET HIGH...

Page 15: ...TING WHEN A SETTING IS TRIPPED AN OUTPUT SIGNAL IS GENERATED THIS CAN BE USED TO SWITCH ON A RUGGED 35 AMP RELAY TO ACTIVATE A LOW OIL ENGINE KILL ALARMS CUT THROTTLE BODY SENSOR TO DEFUEL KILL BOOST...

Page 16: ...TRICAL SHORTS DURING INSTALLATION DO NOT INTERFERE WITH ANY EXISTING CONNECTIONS OR WIRES ALL ELECTRICAL CONNECTIONS USE SOLDER LESS CONNECTORS AND INSULATE ALL CONNECTIONS WITH ELECTRICAL TAPE AVOID...

Page 17: ...ons while reviewing this guide Gauge is field programmable by the operator while installed in the vehicle This programming is accessed by pressing the control buttons located on the face or the meter...

Page 18: ...RACING YELLOW LINE SETTING Set the Minimum RED LINE Sets the point at which LOW warning threshold is reached for that specific gauge The Down and Up buttons will move the dial pointer to select the LO...

Page 19: ...AK warning indicators light The Demo mode does not time out If the gauge is turned off in the Demo mode it will start up in the Demo Mode Press the Mode button to return the gauge to NORMAL operation...

Page 20: ...PRIMARY DIESEL ENGINES Modern diesel engines usually have camshaft sensors or electronic injector pumps If there is one injector per cylinder the signal from the pump drive will be 1 2 PPR Similarly i...

Page 21: ...ease the engin speed till you hit 2000 RPM The meter will read some nonzero value that increases and decreases with engine speed but it will not be accurate While the engine is running steadily at 200...

Page 22: ...GREEN YELLOW ORANGE RED WHITE Press the center button to save and advance to NORMAL OPERA TION NORMAL OPERATION ON POWER UP THE GAUGE READS THE RPM Press the center button to save and advance to PEAK...

Page 23: ...ue by moving dial pointer to corresponding RPM Press the center button to save and return to NORMAL OPERATION See PPR Chart Page 4 5 OPTION POINTER BRIGHTNESS While in DIAL BRIGHTNESS press and hold t...

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