fastest mph

[rolling_trip]

#1, just because your speedo indicates "175mph", that doesn't mean that you are doing 175mph. The faster you go, the more off most speedos become.

Ruiner is right. My ECU speed is different from my speedo after about 65 mph. The faster I go, the worst it gets. As far as I can tell my ECU is dead on. Damn i love my data monitor.

[UpSideDownDesi]

Ruiner is right. My ECU speed is different from my speedo after about 65 mph. The faster I go, the worst it gets. As far as I can tell my ECU is dead on. Damn i love my data monitor.

how off.....like what if the speedo says 100.....what does the ECU say?

[Ruiner]

how off.....like what if the speedo says 100.....what does the ECU say?

I'll tell you this: different cars have different "off" factors. It depends on many variables...such as wheel size, calibration, etc.

The thing about it is this: the faster you go, the more "off" the speedo is. There is an exponential increase instead of a linear one.

[rolling_trip]

how off.....like what if the speedo says 100.....what does the ECU say?

not sure about 100, but when the speedo reads 80, the ecu says 76, 85=80

[Z32redondo]

Hey guys thought it would be kinda cool to "update" if we went any faster in the past year.

Mine is 125-130 in the Z did it with top up and top down before. Its weird with the top down though. I usually let off quiet fast because I think I will lose control cause of the non-aerodynamicness (SP) of having no top.

Oh and if everyone is going to freak out cause its an old thread just dont respond and let it sink back into IA's history. I figured it would be one of those threads that if brought back up nobody would really have a problem with it being around and they would respond and so forth. So ya dont freak out just let it die off...again, if everyone is going to freak out.