i want an rpm meter in my bj73 3b but the factory has not build 1 in mine !
can i install one and how do i do that ?
can i install one and how do i do that ?
rpm meter
- Thread starter buschmaster86
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Tiny Tacho Digitl I have one in my RED truck hooks onto injector no 1.
http://tinytach.com/diesel.php
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- #3
how does it work ?
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Its a TRANSDUCER and works off the pulse of the injector 
works very well. I just wish they would make a bigger one.
works very well. I just wish they would make a bigger one.
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- #5
Hmm i believe you it works accurate but i dont feel comfortable with something that measures sound pulses ?
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They're very accurate but can be susceptible to noise. They are used to time diesel engines with a 'pulse adapter' for a digital timing light. They work of piezo electrics usually.
--
The BJ73 can have a tacho added, the sensor is usually on the bellhousing, and it counts flywheel teeth. One from a BJ74 or a tach equipped BJ73 would work. Very easy to wire up if the bellhousing has the hole tapped and available to you. You'll also need the correct instrument cluster.
Aftermarket tachs can run of many different things, alternator-based tachs are fairly common on diesels.
~John
Maybe you could source a dash fascia with the factory tacho and go from there.I cant see it being too hard,although Im not big on electrical instals.
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- #8
alright thanks ! ill see what i can do.
i tried this route and looked into it extensively, you basically need an entirely new instrument cluster with the desired sensor gauges included (don't even think about buying individual gauges and adding)... then you need the factory tacho sender as well, but there's no guarantees that the existing loom behind the instrument cluster will have the unused wires present to just plug n play, or that the existing wiring connectors will have the same configuration for the new cluster panel. It is extremely expensive if you can't get the parts second hand, toyota quoted me thousands to my utter dismay just for parts with no guarantee it would match up (they refused to install it for me if i went ahead with the purchase). i went with a backlit tinytach, which is dead easy to install, seems to work quite well and you get an hour meter as well, and I spent all the cash saved on heaps of other things.
but to be really useful when driving i would suggest mounting it in a hood above the instrument cluster so its in your line of vision. here's my installation (without the cover on top) to give you an idea of its size.
Do you have more pictures about the location of the sensor? Does it read the rpm from fuel pump?
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as we said before it runs off the injector pipes - usually cylinder no 1 however i notice my rebuilt egine its on injector pipe no 2 and no issue. I will take some pics today when I collect the RED truck at the hotel after it's RFC 2013 adventure.
This reminds me!!!
Must get around to trying the factory rpm meter on the tiny tach circuit.
Must get around to trying the factory rpm meter on the tiny tach circuit.