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a unit such as Emanage Ultimate would be ideal, for air:fuel, ignition timing control etc.

or perhaps do a remap chip in your stock ecu?

im using a remap from sau user Toshi, plus an Apexi safc-ii for air:fuel control, plus Apexi sitc for ignition timing

with an adjustable fuel pressure regulator (if applicable in N/A?) along with an adjustable exhaust cam gear wheel could net you some great gains.

good luck with it.

$ wise, an Ultimate + exhaust cam gear + setup/tune would be around $1500 incl service matrials, at a good workshop of course

unfortunately on an NA system you are really only going to see noticeable gains with some form of ecu/piggy back management when you start improving the breathing/exhausting efficiency of the entire system.

you can tweak settings like fuel, timing, AFRs, etc. but the major differences will be seen once you increase air intake, exhaust efficiency, compression, etc. until then all you really can do is 'clean-up' your current tune.

turbos respond alot better to tuning, because you can play around with boost pressure, temperature, timing of boost, etc.

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