Ok .. does anyone here have 10-15 dyno charts of the same car they can email me ?? For those who know about 6 Sigma (process improvement) ... 1 of the steps is called an MSA ( Measuring system analysis) This is to essentially measure the measurer .......... and statistically prove how reliable and effective it can be. EG. a real test i did was ... drew a line on a piece of paper ... gave the same ruler to 10 different ppl ... and got them to measure the length of the line.... Obviously i got slightly different results ... when I plugged the numbers in to a statistical program (for all those stats ppl out there) my p values were <.01 hence suggesting that the variation amongst those 10 ppl was acceptable ... So imagine .. line = car, ruler=dyno and 10 different ppl = different runs If someone has 10-15 data points/dyno charts ... im more than happy to plug these numbers in and see if it is the same .. but i dont think so ...gut feel is that the numbers wont be good enough to stastically prove that a dyno is an accurate way to measure .... Yes yes ... its still a way to measure .... but u can measure distance with a ruler or with a piece of string ?? If we want to start measuring against ourselves we really should make sure the tool we are using to measure is accurate .. In fact If 10 ppl had 10-15 dyno charts each ... i could stastically prove which "variables" impact a dyno the most.. does anyone have that kinda data I can play around with ??