Looking for a generic replacement speed sensor for a RacePak data logger. I have zero RacePak experience, so I don’t know if they designed it to except a 2 wire sensor or needs a 3 wire Hall effect sensor. Any help on securing a generic speed sensor, that has worked on a racers RacePak is appreciated.
2005 2000lb 4 link dragster home brew 582 BBC Dart 355 1.058 2.98 4.629@149 6.094 7.310@185
July 23, 2025, 11:30 PM
TOP38
Mine has magnets on the collar so it's not a Hall Effect sensor. Just 2 wires for a mag pickup.
July 24, 2025, 06:34 AM
ski_dwn_it
Contact Greg Kelley he will hook you up with that you need and any alternatives
July 24, 2025, 07:39 AM
SP 124X
Every racepak I've worked on has had 3 wire sensors.
Denis LeBlanc
July 24, 2025, 08:12 AM
Al Alguire
FWIW I use Low Dollar Motorsports ones..Less money but you have to buy a Molex connector for the wiring. Pretty simple and they have instructions
"I am not ashamed to confess I am ignorant of what I do not know." Marcus Tullius Cicero
July 24, 2025, 08:25 AM
SP 124X
quote:
Originally posted by Al Alguire: FWIW I use Low Dollar Motorsports ones..Less money but you have to buy a Molex connector for the wiring. Pretty simple and they have instructions
I switch to 3 pin dtm connector.
Denis LeBlanc
July 24, 2025, 03:43 PM
adv ET 266
Sounds like they can use a two wire or 3 wire sensor. Is that based on the system vintage or do they all have the ability (to run either) and the setup tool lets you select the type sensor?
2005 2000lb 4 link dragster home brew 582 BBC Dart 355 1.058 2.98 4.629@149 6.094 7.310@185
July 25, 2025, 07:51 AM
Rodney Pryor
It will mostly depend on the wiring harness of the data logger. Some of the older v300 data loggers used the 2 wire sensor. The v300SD, Sportsman and IQ3 data loggers all use the 3 wire sensor.
July 25, 2025, 08:06 AM
sr4440
Just to clarify, here is how you identify the 3 main shaft speed sensors used in a car. 1st is a variable reluctance (VR) this is a 2 wire sensor that measure ferrous metal. Note the output voltage goes up as the speed increases.
2nd is a hall effect. A hall effect is a 2 wire sensor that senses magnets as they move close by. Output voltage is constant.
3rd is a gear tooth hall effect sensor. This is a 3 wire sensor that has an internal magnet that senses ferrous metal. Output voltage is constant.This message has been edited. Last edited by: sr4440,
Without data, you’re just another guy with an opinion.
July 27, 2025, 11:00 PM
BP758
quote:
Originally posted by Al Alguire: FWIW I use Low Dollar Motorsports ones..Less money but you have to buy a Molex connector for the wiring. Pretty simple and they have instructions
