QUOTE(mepstein @ Mar 9 2018, 11:48 AM)
I was mistaken when I once said you need to use a 3.2 tach with a 3.2 engine. An early tach will work fine and not damage the brain.
About two months ago when I ordered a Wong chip for my '87 3.2 w/Motronic motor, he asked me which tach I had and warned about using an early one. He didn't how early though and he didn't explain the potential problem with doing so. Since I already have a same year stock tachometer from a Carrera, I didn't ask. I don't understand the issue.