Maximum boost thread (93 oct > pump petrol/gasoline only!)

[RICE RACING]

Originally Posted by TitaniumTT

My M820 will log speed, that's all you want to see right? Time and speed. You'll have to do the conversion from mph to that silly thing you see

Even in a near 700bhp car like mine with race tires on the back and true calibrated wheel speed sensors to the VBOX under acceleration you either have (under speed) on front wheels *due to them not being in full contact with the ground* even in 3rd gear! OR you have over rotation or wheel slip in the order of 4% or more @ 100mph. So you NEVER ever get a true velocity trace using wheel speed sensors.

This is why F1 cars run pitot tubes and also GPS speed traces to get true velocities.

I should post up a graph of time and velocity to REAL time and velocity off an ECU log v's a VBOX GPS log, in a short test like a 90-140kmh 3rd gear power band test you can have differences of up to 0.2 seconds (faster on ECU log v's a real log with a true speed trace that is accurate).

Velocity is NOT easy to measure, you need lab not LEB grade equipment to do so. Only company that does this properly is Race Logic and the top end gear VB3i is like 20k+ *fully kitted out* lol (I know I have it).