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before everybody dives off the cliff about chips, chips can and do make power
that being said, they almost never make what is advertised, and there are a lot of factors involved
a normally aspirated 2.5 can expect to see 7 or 8hp with a GOOD chip, on premium fuel, assuming that the ambient temp is below 80F, and you are near sea level, with average barometric pressure and humidity - this is your best case scenario
any changes to those conditions will alter the results, and lower the results (lower ambient temp can raise the output if not accompanied by adversely affecting pressure and humidity)
other engines can see more from a chip - for example, there are a number of chips for the 968 that make between 11 and 16hp
chips for turbos make even more
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