I've got a hahn stage 1 on my 04 busa. I'm really wanting to get rid of the fmu fuel system for larger injectors or a secondary fuel system. Anybody got any experience with the conversion and which is more reliable? I want to keep boost levels at 7.5 on low and 14 on high.
IMHO the larger injectors with a 1:1 reg isnt a very tunable setup UNLESS you go with a standalone (i personally havent tested the PC hub)
a secondary setup is a real nice setup and only supplies fuel when the controller sees boost and will only add the required fuel per amount of boost (when tuned correctly)
i prefer the secondary setup for street and track
and i prefer the standalone when full track
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