Kirkster Posted May 24, 2014 Share Posted May 24, 2014 Ok, So being a Newb to the 240Z scene and building mine up to be an autocross and track toy I am now looking at what to do about the tach. So if money was no object what would you replace your factory tach with that still fits in the factory location and easily interfaces with the tach output from a MS3-pro which is a 12 volt square wave? I have this thing pretty close to running now and am tying up the loose ends. K Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted May 25, 2014 Share Posted May 25, 2014 I use a later model Maxima tach and speedo with my Megasquirt. It is driven by the tach out circuit on the MS3X board. The speedo is also providing an input as well to give me speed info that allows boost by gear. You can also run the Autometer 5 inch tachs, but I didnt want to spend the $500 for the matched set. Any later model tach will work with Megasquirt. With the correct tach adapter, the stock tach will work with Megasquirt. If you are using only one coil, then it doesnt matter, MS doesnt have to run the tach. Quote Link to comment Share on other sites More sharing options...
Kirkster Posted May 25, 2014 Author Share Posted May 25, 2014 My car is no longer running one coil. I am using LS1 coils and am guessing I have to drive the tach from the megasquirt output. So what is the popular Autometer 5 inch that looks closest to the factory tach? K Quote Link to comment Share on other sites More sharing options...
winstonusmc Posted May 25, 2014 Share Posted May 25, 2014 Http://forums.hybridz.org/topic/36415-pro-comp-gauges-installed/ about the same amount of work for the Maxima gauges. If you want stock looking guages, then stick with the stock tach and this: http://forums.hybridz.org/topic/37376-getting-your-early-240z-tachometer-working-with-an-msd-6-series-ignition/ Quote Link to comment Share on other sites More sharing options...
Kirkster Posted May 26, 2014 Author Share Posted May 26, 2014 Thanks for the links. I guess I have some more head scratching to do... Quote Link to comment Share on other sites More sharing options...
tooquick260 Posted July 17, 2014 Share Posted July 17, 2014 I put the speedhut tach in that looks like the stock gauge. 4in 10,000 rpm and used the out put from my ms3pro. Quote Link to comment Share on other sites More sharing options...
Chris83zxt Posted October 18, 2014 Share Posted October 18, 2014 The Toyota relay DIY adapter works fine with the stock 280 tach if you want to go that route. Quote Link to comment Share on other sites More sharing options...
RPMS Posted October 28, 2014 Share Posted October 28, 2014 (edited) Edit: never mind! I Googled it. Thanks! Edited October 28, 2014 by RPMS Quote Link to comment Share on other sites More sharing options...
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