I found one post about a s5 turbo but I have a s4 na. I'm looking to upgrade the ecu and don't want to spend the time and money on a motec or haltech, is there an adapter I can buy or is there instructions to make one. I have a good under standing of electronics so I'm not afraid of a wiring diagram. thanks for any help.

 

pfc might be overkill for a NA. All you need to worry about is timing and some fuel with a NA....and not alot of fuel at that. Try going with the APexi itc and afc timing and fuel computers. Cheaper than a hacked pfc and would do the same thing.

Tim