Thats all well and good , To say a t3 s60 stg3 turbo is what your need for your Focus isnt something that can come from reading a forum , The Zetec isnt like most engines in how it responds to boost
Teaching people what the diff numbers are and PPM is all well and good , but what if those # dont apply to the Focus they way they do other 4 cyl engines , so you learn a lot of this stuff , buy a turbo to find out it wont make the power you wanted , many will come back here and , well you guys said if this and this was here that this turbo would make the power I wanted
There may be 5 people on here that can read a turbo graph and maybe 2-3 that actually understand what there reading
Then you get into custom turbos that with the Zetec throw a lot of sence out the window , picking a turbo isnt something your going to learn from a forum it is like tuning and something that takes years of building boosted engines on a dyno to learn what the numbers mean and do
Then you get into HP ratings and those are commercial HP ratings # and have little to do with the actual HP the turbo will make from one build to another let alone one engine to another
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