My FB Tach Reads High -- How Do I Fix It?
I know it's reading low because my standalone ECU and the tach on the dyno both say 7300 RPM, when my tach says 8000 RPM. Is there a way to calibrate it?
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grannysspeedshop.com has a writeup on recalibrating for V6s and V8s but you can use that for calibrating for rotary as well.
IMO don't bother, just get a quality tach like a Sport Comp. The stock tach actually is accurate in 1st gear, unless your car is really quick in which case it actually lags behind the engine, despite being 10% too high under steady state conditions. |
Thanks, man -- an excellent write-up! Just what I was looking for.
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