if u have ever seen an autometer wanky air fuel ratio gauge fitted to a
factory narrow band u would understand
basically u accelerate and it reads rich
u back off and it reads lean
thats bout as accurate as they get
a wide band costs around 300 to 500 bucks for somehting good
but is accurate once they warm up
so depends how much accuracy u want and if u want to wase yr money on a narrow band
have u priced up what the top tuners use
autronic and motec proffesional air fuel ratio meters range from 1000 to 2000 dollars
no i havn't seen "wanky" cheapo ones in use..all my experience has been on lovely dirty diesels where i dont need afr meter just a good egt gauge (and boost gauge)..
so mr sideshow, thanks for that info, i wont then be buying the cheapo but the expensiveo one..