i have the pro RR and i love it, works great, accurate as all hell, gets me the same numbers as i get at the track. but that is the 300$ one.... i did not pay that much but it also records everything and you can upload to your computer. if you are thinking about getting HP numbers good luck so far mine is OFF to say the least. the rpm thing works 99% of the time but does throw fits. I think it is an ok buy if you are into knowing what your car is running. and will be usefull for mods and such. you just need a good long flat strip of road. it will be off if you are driving up hill stuff like that.
Yeah I know a few stretches of long straight road around here. BTW how far off are the HP readings? Are there any other brands of computers perhaps better and finally where can I buy it besides online?
My work schedule doesn't allow me hardly any chances to get to the track and besides the only track nearby is just a 1/8th mile. I don't want a guess, I want something very accurate. So are there any accurate performance meters out there and can they be bought at a store ihnstead of online?