Im on Siemens 55lb injectors with a Turbo Technics T35.55, peaks @32 psi and was holding 28 psi, i say was holding 28 psi because ive had to turn boost down to 24 psi due to my AP organic clutch slipping.I wouldnt say it was overly if at all laggy. But to answer your question its defo worth doing, really puts a smile on your face. My cars a 2wd though.