Author Topic: Tiny-Tach (Read 4434 times)

fatmobile · « **Reply #15 on:** February 16, 2008, 01:10:42 am »

Can you take a picture of the transducer?
I overtightened the one on my ferret timing light and ruined it.
The tinytach ones are cheaper than a new ferret one but they won't send me a picture of it to see if I can use it for a replacement.

hillfolk'r · « **Reply #16 on:** February 16, 2008, 03:06:49 pm »

digital is a little hard to read(to me) in the heat of the moment
i got a lil 2 inch vdo diesel tach that runs off the w terminal
i verified the accuracy with a diesel pulse adapter and a digital timing light/tach and adjusted it(the tach has an adjustment pot)

now i got a GTECH RR and it has a shift light
now in the "heat of the moment" all i look for is the shiftlight on the gtech
tach is in the middle

shift light is 4 little leds on upper right side of gtech

rabbitman · « **Reply #17 on:** February 17, 2008, 02:28:52 am »

fatmobile · « **Reply #18 on:** February 18, 2008, 04:54:54 am »

Thanks for the pics.
Pretty close to the one on my ferret 765.
The ferret has a ground clamp that clamps to the injector line.
Did the tinytach have a ground wire on the injector line?

saurkraut · « **Reply #19 on:** February 18, 2008, 08:00:12 am »

Quote from: "rabbitman"

They sell these sepparatly for $35.

Any one have ideas about running a gasser tac with this sensor?

jimfoo · « **Reply #20 on:** February 18, 2008, 09:54:21 am »

Quote from: "fatmobile"

Thanks for the pics.
Pretty close to the one on my ferret 765.
The ferret has a ground clamp that clamps to the injector line.
Did the tinytach have a ground wire on the injector line?

Do you know what kind of signal it outputs off hand? I'm guessing a very low current but higher voltage?

jimfoo · « **Reply #21 on:** February 18, 2008, 09:56:21 am »

Quote from: saurkraut

Quote from: "rabbitman"

Any one have ideas about running a gasser tac with this sensor?

I would guess there wouldn't be enough pressure for it to detect as it's close to a factor of 100 less, but you can find out for only $35. :lol:

Vincent Waldon · « **Reply #22 on:** February 18, 2008, 12:35:44 pm »

It's a piezio transducer so the output will be an extremely brief pulse of several hundred (if not thousand) volts... albeit at a very very low current.

It will also only give one pulse every two revolutions so will read 1/4 what a gasser tach will read.

I have one on the way and will do some digging with my oscilloscope when it gets here... first priority will be to design a timing light adapter for it... but a frequency quaduplier should not be too hard ;-)

EDIT: it's 1/4 of what a gasser tach will read

rabbitman · « **Reply #23 on:** February 18, 2008, 03:42:56 pm »

I don't think it would work on a gasser since it senses the injection by feeling the pulse through the Injector line.

There is a ground wire but it's under a valve cover nut.

Vincent Waldon · « **Reply #24 on:** February 18, 2008, 04:42:35 pm »

yup... just did the math in my head... will edit the above posts for posterity !