Kooky is right. You would also need to add an ignition coil and power it for it to work.
Not true if he used a sensor on the distributor rotor and ground off three of the four lobes. I don't think he was planning on using a distributor with points. He would still need a way to convert the signal from the sensor into a valid number though.
I have come to the realization that the idea is too Kooky to be practical. I would have gladly run an electronic distributor and coil, just for the purposes of triggering a tach signal.
I'm building a dedicated race truck that will see very few miles.
The Ford (or equivalent) magnetic sensor looks like a pretty solid idea.
The optical sensor measuring at the cam sprocket seems OK, too.
Right now, I'm seriously thinking about buying one of those digital tiny tachs.
Steve.
There was someone on here who used an optical sensor and a couple of white marks on the IP pulley - the sensor had its own light source and picked up the reflections. You could also mount a couple of magnets to the IP pulley quite easily if you wanted to go the magnetic route.
I have come to the realization that the idea is too Kooky to be practical. I would have gladly run an electronic distributor and coil, just for the purposes of triggering a tach signal.
I'm building a dedicated race truck that will see very few miles.
The Ford (or equivalent) magnetic sensor looks like a pretty solid idea.
The optical sensor measuring at the cam sprocket seems OK, too.
Right now, I'm seriously thinking about buying one of those digital tiny tachs.
Steve.
i dont like having the sensor that close to my timing belt. ive already had one sensor come apart on me, i dont want it to be able to come apart, and break my timing belt..
getting the reading directly from the crank with an external sensor is a little less prone to failure, if you ask me.."
my crank trigger tach idea was based off the photo-electric tach.. but highly modified..
all i had to do, was tach 2 nuts on my crank pulley, build a bracket for the sensor, and run wiring..
plus, you can use this method to drive almost any gasser 4 cylinder tach..
racer.... libby help me...
i know for one snap on sold a contraption you inerted in the glow plug hole... to run a timming light.. a normal old school timming light.. old early 80s tech.. only seen used 1 time...
why libby... i know he is using something like this for a timming light... you no need 4 glowplugs on a racer... install the tool as a tach signal you can also use to set ideal pump timming...