Quote:
Originally Posted by flash968
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
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Yeah? Wanna post some before & after dyno-sheets of a 944NA that'll give you 7-8hp with just a chip-swap? There's a HUGE group of guys who race 944-spec and I have yet to see a single dyno-chart that has that much gain from just a chip. And I assure you, these guys know ALL the tricks on getting more power out of a 944NA and the best bet is to install the 10.6:1 euro-pistons and shave the head LOTS to get 12:1 compression. Even then, that's only worth about 10hp. And yeah, you gotta run 98-100 octane fuel all the time.
More realistically, you can count on 3-4bhp gain with NA chip-upgrade and plan on using 91-octane full-time.