kenola_oil Posted April 7, 2019 Report Share Posted April 7, 2019 Hi guys, just in the planning stages of wiring my storm into my AE86, I am wondering how to get the tacho working with an Aux out from the ECU, I am running COP ignition so have no high voltage igniter signal that is usually sent to the tacho. From what I have seen some people talk about removing the tacho and replacing a high value resistor for a lower value one, I am wondering if anybody has any specific experience and instructions for the AE86 tacho? Any help would be appreciated! Quote Link to comment Share on other sites More sharing options...
JMP Posted April 7, 2019 Report Share Posted April 7, 2019 yes, I've done it many times. Follow the attached guide and it will work perfectly ae86 gze tacho translated final.pdf kenola_oil 1 Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 7, 2019 Report Share Posted April 7, 2019 If you are not confident with a soldering iron to to the above mod, the alternative option is a tacho booster or coil relay. Quote Link to comment Share on other sites More sharing options...
kenola_oil Posted April 7, 2019 Author Report Share Posted April 7, 2019 Thanks guys, both of these solutions are great, I was looking for something more specific to the AE86 so thank you JMP. After having a bit of a think about it, I think I will try to make one of those tacho boosters as it will be simpler than removing the cluster and easily interchangeable if I decide to use another tacho for any reason. Adamw is there any downside to using such tacho booster? Quote Link to comment Share on other sites More sharing options...
Richard Hill Posted April 7, 2019 Report Share Posted April 7, 2019 I have modded a JDM AE86 cluster to run with link. I piggybacked 1 resistor onto the input stage of the T2685A tacho IC (this method allows the mod to be easily undone if needed) and it worked fine. It is a bit fiddly as you have to strip down the instrument cluster to get to the PCB. The relay mod method is simpler but less elegant. Both will work fine. HTH, Richard. Quote Link to comment Share on other sites More sharing options...
Jacky Fung Posted April 25, 2019 Report Share Posted April 25, 2019 Yes. AdamW provide solution work great for me. Really appreciate your help!!! Quote Link to comment Share on other sites More sharing options...
Simon-AE86 Posted April 27, 2019 Report Share Posted April 27, 2019 Your only need to remove the R4 resistor on the tacho circuit board and wire in a 100ohm resistor. Its as simple as that. you can remove the cluster, pull apart, cut the OE resistor out and solder in the new one in place, refit and be done in half hour. FWIW the relay mod does not always work. Quote Link to comment Share on other sites More sharing options...
kenola_oil Posted April 27, 2019 Author Report Share Posted April 27, 2019 thanks simon for the heads up, unfortunately, I dont even know what - where the R4 resistor is, im guessing R4 is a code for the value of the resistor? Im fine with removing and soldering, but not familiar with the actual parts themselves. Quote Link to comment Share on other sites More sharing options...
Simon-AE86 Posted April 27, 2019 Report Share Posted April 27, 2019 this should help Quote Link to comment Share on other sites More sharing options...
kenola_oil Posted April 27, 2019 Author Report Share Posted April 27, 2019 beautiful, thanks heaps man! Quote Link to comment Share on other sites More sharing options...
TszFung Posted May 8, 2023 Report Share Posted May 8, 2023 On 4/27/2019 at 3:10 PM, Simon-AE86 said: this should help http://www.autosoftsys.com/supra/tachcompare/tachbits.jpg Sorry I am reading this post but the image is out of time ,could you please upload again? Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 8, 2023 Report Share Posted May 8, 2023 Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.