AtomChurch Posted March 28, 2008 Report Share Posted March 28, 2008 Theres a article in the dime quarterly that explains this but i will take you through my steps. [thanks to mklotz for the scans of the article] I can send the scans to you if you need them.] this is fairly simple to do. First I went to the U-pull it and got a stock tach from a nissan sentra [not recomended by the article because it doesnt fit inside the stock tach box but I made do] Then you take the board off of the stock nissan/datsun donor tach. you locate the green/yellow wires on the back of the tach Cut then wires off on the faceplate side so you have the most room to wire the new board in to the old face plate. Then strip the wires. then set the donor tach aside. Next take your stock tach and take off the face plate by removing the 4 screws on the front in each corner. then remove the 4 screws on the back of the stock case and pull out the tach faceplate and the board that is attached. proceed to remove the two boards [one in the stock orange needle tach] by removing the brass spacer bolts. locate the green/yellow wires on the stock tach and cut them close to the board not the face plate [opposite of the donor tach!] next I ran two new wires out of the back of my tach [ one for the green and one for the yellow] to connect to the new tach board. [since I got a newer year and the board was changed so that it doesnt fit in the stock box] Then just connect the green wire to the green wire and the yellow to the yellow. now the tricky part. if you got a newer tach [like me] its not inductive. there are only three wires. The new board will have three wires comming off of it to connect to the harness in the car you pulled it from. Mine had a red,black, and a yellow. red was +12v. black was ground. and yellow went to the +side of the coil. now my tachs shows this when I give it some gas! Quote Link to comment
Icehouse Posted March 28, 2008 Report Share Posted March 28, 2008 Nice! So its now and inductive tach? The power goes through the tach to the coil? I tried to do a similar swap on a spare gauge cluster I had. Nelson showed me his tach and speedo, basically S13 stuff made to fit in the factory location. But I gave up.... All the little pieces started pissing me off! :D Quote Link to comment
AtomChurch Posted March 28, 2008 Author Report Share Posted March 28, 2008 The stock was was inductive but since I grabed a newer one from lack of old datsun's at U-pull it It wasn't inductive. the inductive one gets wired through the tach to the neg side of the coil. its pretty simple to just replace the boards. if you had to re-solder the resistors and caps that would get frustrating, but I didnt notice the hand made quality on the origonal stock tach. you know like when I was in high school learning to solder the copper tracing on the board. Quote Link to comment
Icehouse Posted March 28, 2008 Report Share Posted March 28, 2008 hhhmmm I need to do some reading :D Need to figure out how to wire the tach's up to the newer motors.... Its hard to get motivated when I have the old dash that doesn't even have a tach :D Quote Link to comment
AtomChurch Posted March 28, 2008 Author Report Share Posted March 28, 2008 haha well I was motivated when some guy was selling his stock tach on CL. I got really excited and went and bought it and never even asked him if it worked. But if you do what I did and get a newer nissan/datsun tach with the 3 wires instead of the for [the one's with 4 are the inductive ones] then you can hook it up to newer motors, unless you have some fancy motors then you just get an adapter. or whatever. thats why I stick with my L20. Its not stock, but its all datsun. Quote Link to comment
DatDoug Posted March 28, 2008 Report Share Posted March 28, 2008 I love my tach! It never goes above 3500 rpm! Saves on my motor!:blink: I can b doing 50 in 2nd gear and she is still pegged rite @ 3500! I hear it is a rare item:D Quote Link to comment
banzai510(hainz) Posted March 28, 2008 Report Share Posted March 28, 2008 good write up I would be to scared to rip apart a SSS tach. Afraid I wouldnt be abe to put it back together. Quote Link to comment
AtomChurch Posted March 29, 2008 Author Report Share Posted March 29, 2008 I love my tach! It never goes above 3500 rpm! Saves on my motor!:blink:I can b doing 50 in 2nd gear and she is still pegged rite @ 3500! I hear it is a rare item:D thats what happend to the stock one. then it just stopped working. its a metal thing stuck holding it from going all the way up. open it up and take it out!! then it should go all the way up. Quote Link to comment
djlotus Posted March 29, 2008 Report Share Posted March 29, 2008 My car doesn't have a tach. Could I just grab one from the junkyard and wire it up (12+v, ground, coil) and it'd work? Quote Link to comment
AtomChurch Posted March 30, 2008 Author Report Share Posted March 30, 2008 you would have to get one that gits in the stock loaction. meaning a stock tach. but yes you could just fudge another one in the spot. i have seen some people cut the center out of that area and put a tach between the oil/brake/charg lights. Quote Link to comment
djlotus Posted March 30, 2008 Report Share Posted March 30, 2008 Good to know. I doubt I'll be able to find a tach for a '69. So I'll just rig one up for the time being. Quote Link to comment
MicroMachinery Posted October 2, 2009 Report Share Posted October 2, 2009 I have a stock tach in my 71 Wagon. It moves a little, but not much. I pulled it apart to see if maybe it was dirty, grimy, or had a hairball or something, but when I did, it sparkled. The thing's like NEW. When I got it, it wasn't even plugged in. If it moves a little, but isn't accurate, is there a chance that it's still good, and maybe I'm doing something wrong? Or should I just bite the bullet and do the swap.. Thanks on the write up, by the way. I may end up needing it :rolleyes: Quote Link to comment
AtomChurch Posted October 6, 2009 Author Report Share Posted October 6, 2009 I have a stock tach in my 71 Wagon. It moves a little, but not much. I pulled it apart to see if maybe it was dirty, grimy, or had a hairball or something, but when I did, it sparkled. The thing's like NEW. When I got it, it wasn't even plugged in. If it moves a little, but isn't accurate, is there a chance that it's still good, and maybe I'm doing something wrong? Or should I just bite the bullet and do the swap..Thanks on the write up, by the way. I may end up needing it :rolleyes: I would try and save it. But not sure if it really matters. My tach moved a little too and i ended up just doing this and now it works. good luck. also look for a small board at a junk yard that fits in the stock location. Quote Link to comment
78kingcab Posted October 6, 2009 Report Share Posted October 6, 2009 kinda off subject but tach related....why are some tach needels orange and some white? Quote Link to comment
AtomChurch Posted October 6, 2009 Author Report Share Posted October 6, 2009 different models and years. Quote Link to comment
Creepy Cruiser Posted October 6, 2009 Report Share Posted October 6, 2009 Can you tell us what year sentra guts that you used on yours and the year and model of the ones in the DQ "how to"? Thanks. Quote Link to comment
AtomChurch Posted October 6, 2009 Author Report Share Posted October 6, 2009 I dont remember what year it was out of, but any nissan/datsun tach with the yellow and green wires will work. Quote Link to comment
Creepy Cruiser Posted October 6, 2009 Report Share Posted October 6, 2009 Cool thanks. Quote Link to comment
okayfine Posted October 6, 2009 Report Share Posted October 6, 2009 Mr. Atom, please remove those scans of The Dime, Quarterly. You do not have permission to replicate the material. This also goes for Mr. Klotz. It is unfortunate that my first Ratsun post has to be such an annoucement. I have seen this occur previously on Ratsun and let it slide, however it would seem that has only led to more of this happening, and now full scans have appeared. The Dime, Quarterly, is the only technical resource out there for 510 enthusiasts. We try to put together top-notch issues full of relevant content and make sure the articles are proofed and photographed or illustrated as well as possible. We don't do this for money, as none of the DQ volunteers get paid. We do this so that there IS a technical resource our there for 510 enthusiasts. A subscription to DQ is a paltry $15. That's the same price it has been since last century. Ressurrecting one 510 tach is easily worth the $4.50 for a back issue. Moreover, supporting DQ via a subscription does provide funds to DQ to help support events like JCCS (we have been a sponsor of JCCS for some time) and helps pay the hosting fees for http://www.diimequarterly.com, where there is much content that we don't charge for. Thank you, Julian DQed Quote Link to comment
AtomChurch Posted October 7, 2009 Author Report Share Posted October 7, 2009 I am sorry. I did not know that particular article was protected. Quote Link to comment
71ka510 Posted November 11, 2009 Report Share Posted November 11, 2009 i thank atomchurch for posting info for free...... thats what ratsun is all about..... i have to talk smack... julian is rude and man to too many people...... yes, i nderstand they are copy written, still comes off as a d*#k sometimes though :P lol 1 Quote Link to comment
TENDRIL Posted February 19, 2014 Report Share Posted February 19, 2014 this is the one i meant to bump Quote Link to comment
qwik510 Posted February 19, 2014 Report Share Posted February 19, 2014 I am sorry. I did not know that particular article was protected. All the DQ stuff is now available online for free. All the DQ back issues are at this link: https://docs.google.com/folder/d/0ByCvxnHNk90SYzc4N2E1MWEtMzg0MC00YTE4LTkxZGQtM2RjODA5ODA1YjU1/edit The tach repair stuff is located here: Volume 2 Issue 4 Page 12 https://docs.google.com/file/d/0ByCvxnHNk90SMDMzMmRmZWYtOTRjZC00NGQ0LTg2NWQtOTcyNDk3MDJiZjFj/edit 2 Quote Link to comment
TENDRIL Posted February 19, 2014 Report Share Posted February 19, 2014 thank you! Quote Link to comment
qwik510 Posted February 20, 2014 Report Share Posted February 20, 2014 No Problem. Lots of great info in the old DQ back issues. Every 510 owner needs to check them out. Excellent winter reading. Quote Link to comment
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