|I've had a few request for info on how
accurate the 200 mph gauge is after the calibration is performed. I
did a comparison at different speeds to show the difference between
the stock gauge and the 200 mph gauge. From what I've seen, the
stock gauge always displays a reading of around 5 mph more than what
the ECU reports after reaching 80+ mph. The stock rpm gauge also
displays about a 500 rpm difference after a certain range which I
These first pictures are the stock gauge. This is a never been
touched (in the since of the calibration being readjusted from
factory) stock 1990 gauge I had from my stock. I started gathering
the data at 20 mph and then after every 10 mph.
This is the data I gathered from the 200 mph gauge. I compared
the data every 5 mph starting at 10 mph and then at every 10 mph
once over 100 mph so this is rather long. The result is that due to
the speed indication scale being closer together after the 100 mph
mark the 200 mph gauge is actually a little more accurate once over
And if you can make it here then...:)
The intense light a had the gauges under really brought out the
grainy texture in the 200 mph gauge so here is a side by side
comparison in regular incandescent room light.
Data Voice - The first Nissan diagnostic software with a
my Nissan 300ZX Vin/Model Lookup.
ECZA meet caravan!