60-2 and a Hall sensor

[Andrew C]

With the M48, and a Porsche 911race engine that will red line around 7500RPM, is a hall sensor for Ref ok? I am reading many different opinions regarding the topic.

[AdamW]

You cannot answer your question with a blanket statement that covers all Hall effect sensors and all trigger wheels, you really need to be more specific. There are many Hall effect sensors that work perfectly well with 60-2 wheels, I know for instance GM and BMW now use mostly hall effect sensors with 60-2 wheels on many of their modern production engines.

There are some common hall sensors such as the 1GT101DC however that don't work well with small teeth and/or high tooth count wheels so this is where you need to be careful.

[Scott@FP]

GT101 is 25 years old and needs to be retired. There are many modern HE units that are 100x better and can pick up 2mm top and trough width x 2mm deep teeth.

[Andrew C]

The details of the components areas follows:

60-2 5 inch disk, Clewett Engineering (Electromotive)
Clewett Hall sensor designed for use bu the TEC with same wheel.. No PART NUMBER.

[Scott@FP]

5 in diameter 60-2 has some pretty darned small teeth.

https://www.mouser.com/Search/ProductDetail.aspx?R=SNDH-T4L-G01virtualkey67810000virtualkey785-SNDH-T4L-G01

Recommend a 1K pullup to 8v or B+ on the sensor output, it needs a bit of current draw on the output to get a nice clean square trace at RPM, set up as logic level (no pullup) in software if you have a choice. It WILL work with that small tooth wheel.

[SprinterTRD]

GT 101's dont work with small diameter disks with large ammount of teeth.

The 1997 Honeywell catalog indicates that a 100mm diameter disk will sense correctly up to 3600 RPM with 5mm high, 2.54mm wide, with a tooth spacing of 10.16mm on 6.35 thick disk.

Also Im not sure if it effects the sensors operation but the mounting tab is also in the same plane as the disk rotation.

You will be better off using a magnetic sensor in this installation. Make sure that the sensing pole on the sensor is 2/3 smallet than the tooth width on the chopper disk.

[Andrew C]

Thanks for all the advise, I swapped to a Mag, and now I have a solid crip test light on Cyl 1.. Now to just replace the bad denso 580 in the pack.. Thanks again