jessemz Posted September 4, 2019 Report Share Posted September 4, 2019 The 720 I have did not come with Resistor, but it odes have the connector to add tach. So i bought old Tach connected, no worky. Yep no resistor. did anyone do what I did, what did you use for Resistor? z24 motor 5 speed 2 barrel carb ALL so i added a clock, worked for a bit. it stopped any one had i fixed? or how to fix it? 1 Quote Link to comment
Stoffregen Motorsports Posted September 5, 2019 Report Share Posted September 5, 2019 Is it a pull up resistor? 1 Quote Link to comment
datzenmike Posted September 5, 2019 Report Share Posted September 5, 2019 2.2K ohms. I smashed one of these apart and it had a $0.02 resister inside. Tiny little thing just 3/8" long and looks just like this... 1 Quote Link to comment
Stoffregen Motorsports Posted September 5, 2019 Report Share Posted September 5, 2019 1/4 watt 10K ohm resistor is common for tach power. 1 Quote Link to comment
datzenmike Posted September 5, 2019 Report Share Posted September 5, 2019 It might work but Datsun and early Nissan factory tachs are 2.2K ohms and I'll check the wattage but higher is better than lower. It's cast into plascic so this would help dissapate any heat. 3 Quote Link to comment
jessemz Posted September 6, 2019 Author Report Share Posted September 6, 2019 On 9/4/2019 at 10:19 PM, Stoffregen Motorsports said: Is it a pull up resistor? yes it is..... 1 Quote Link to comment
jessemz Posted September 6, 2019 Author Report Share Posted September 6, 2019 19 hours ago, datzenmike said: It might work but Datsun and early Nissan factory tachs are 2.2K ohms and I'll check the wattage but higher is better than lower. It's cast into plastic so this would help dissipate any heat. Thanks ........ 2 Quote Link to comment
jessemz Posted September 6, 2019 Author Report Share Posted September 6, 2019 On 9/4/2019 at 10:19 PM, Stoffregen Motorsports said: Is it a pull up resistor? yes it is.... 2 Quote Link to comment
bottomwatcher Posted September 7, 2019 Report Share Posted September 7, 2019 I would suspect more element protection and a method to hold the spades than heat dissipation. Not many amps passing through there. Standard Male crimp on spades should slide right in to the receptacle. A coating of liquid electric tape covered by your tape of choice should get you a ratsun fix. 2 Quote Link to comment
datzenmike Posted September 7, 2019 Report Share Posted September 7, 2019 Yup, that's about it. It's the way it is so that's it's easy to handle. Any smaller and it's hard to deal with. 2 Quote Link to comment
Rat-a-tat-Dat Posted September 9, 2019 Report Share Posted September 9, 2019 (edited) As for your clock issue, I had mine ('80 Datsun King Cab, OEM) sent to a watch maker in the big city and from what he described was some very basic cleaning and lubricating technics. Old clocks sit for a long time (no pun intended) collecting all kinds of dust particles and what not. So, save a few dollars and use a low pressure dust removal tool ( compressed air in a can?) or a regulated ( air controlled type) with a common style compressor and some light machine oil, used sparingly. Should free up the gears and motor controls. If required, let oil penetrate seized areas by simply being patient and wait a day or to between applications. Spin clocks hands to ensure free movement with finger dial and wait. That's it! Unless motor is completely seized then this method should work. Edited September 9, 2019 by Rat-a-tat-Dat unclear sentence 2 Quote Link to comment
jessemz Posted September 9, 2019 Author Report Share Posted September 9, 2019 10 hours ago, Rat-a-tat-Dat said: As for your clock issue, I had mine ('80 Datsun King Cab, OEM) sent to a watch maker in the big city and from what he described was some very basic cleaning and lubricating technics. Old clocks sit for a long time (no pun intended) collecting all kinds of dust particles and what not. So, save a few dollars and use a low pressure dust removal tool ( compressed air in a can?) or a regulated ( air controlled type) with a common style compressor and some light machine oil, used sparingly. Should free up the gears and motor controls. If required, let oil penetrate seized areas by simply being patient and wait a day or to between applications. Spin clocks hands to ensure free movement with finger dial and wait. That's it! Unless motor is completely seized then this method should work. 10 hours ago, Rat-a-tat-Dat said: As for your clock issue, I had mine ('80 Datsun King Cab, OEM) sent to a watch maker in the big city and from what he described was some very basic cleaning and lubricating technics. Old clocks sit for a long time (no pun intended) collecting all kinds of dust particles and what not. So, save a few dollars and use a low pressure dust removal tool ( compressed air in a can?) or a regulated ( air controlled type) with a common style compressor and some light machine oil, used sparingly. Should free up the gears and motor controls. If required, let oil penetrate seized areas by simply being patient and wait a day or to between applications. Spin clocks hands to ensure free movement with finger dial and wait. That's it! Unless motor is completely seized then this method should work. Quote Link to comment
jessemz Posted September 9, 2019 Author Report Share Posted September 9, 2019 Guys thanks for info. great group. Rat-a-tat-Dat thanks for info. will try it. if it does not work I will seek out the watch man around me, ATLANTA. 2 Quote Link to comment
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