i will buy an ecu upgrade, but i dont know which one? does anybody knows the real psi of each one, becuase always lies, and i know that the k03 sport suport only about 8 psig in Manifold boost.

 

which one are you considering... most say they give about 1Bar which is 14.7 psi but the spike around 17-18 I know the neuspeed P-chip delivers less boost but has more agressive timming

Do you mean the stock psi is 8psi?.... The ko3 will handle alot more than that obviously

 

ok,see this page: http://www.not2fast.com/turbo/glossary/turbo_calc.shtml it was designed for calculate the performace of the 1.8t of audi, and if you want to get 170hp like my 2003 a4, you have to put in "Manifold boost _8_ psig" because it is the default pressure of the k03 for a normal use, and have to put the "air fuel ratio_9:3:1_" (the real audi a42003 specs) but this k03 data it is based on the manufacturer data, but thanks for your data about the 1bar chips, yesterday i went to audi and check my turbo psi, then in the computer apperars 1640 mbar and i don t understand the differnce between mbar, bar, psi and psig, and i like to know all about my car (down pic)