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i have used a predator twice
but was purely for removing security on a ford 4.6 quad cam

u can adjust timing slightly
like form 0 to 4000 revs is one adjustment so if u ajsut it by 10 it does everything form 0 to 4000 by 10
then u have 4 to 10000 same thing adjust all at once
same with fuel
its not every 500 revs its all below 4000 or all above 4000

u can adjust fan temps
i guess u should be able to do shift points
not sure if thats load related or speed related

last time it cost me 700 aussie landed here

there are heaps more tuners like the predator out there

sct is one