slowsupra

The reason the Tacho won't operate is because you have a tach that is designed for a single coil input, but you are using a coil on plug type ignition system with multiple coils. You will need a Tach adapter from MSD or Dakota Digital(I prefer this one). Wire it in, adjust as needed and you will have a working tach

I've been in the Supra world for about 10 years now, and have owned several MKIV's, MKIII's and even an MKI(with a 1uz-fe swap) I'm not doing a jz or 7m in my 240Z, but I will keep an eye out here to offer any help I can with toyota I6 swaps. I've built and tuned all my own. I can tune AEM, stinger and a few more non relevant EMS's. I've had an NA-T setup that made 701 WHP on a 67mm turbo, and a 7m-gte that made 588 whp on a 66 mm, those are the two most powerful of the supras I have owned. Both stayed together for years with only basic maintenance. So, I just wanted to say if there is anything I can help with in this section, I will be more than happy to.