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Old 10-03-2012, 05:21 PM   #19
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Originally Posted by alaskanzx5 View Post
so im guessing you have been able to get your hands on a 2013 st huh?

from this stand point right now what do you thin will have to be done to fix that nose dive its taking? better breathing? different turbo? a tune that will give up a little tq but create a better power band across the board?
Turbo is the big issue , the turbo is undersized and this isnt a bad thing , my guess is because it would make the RS look bad to come out with HP the same as the ST

Change the turbo then a tune , then work on the Exh and piping to and from the turbo

My opinion is for those that want the big power buy an older duratec 2 door and do a built engine and add turbo get to 300-350 and have fun

The ST is a very costly car to be adding and changing things for big power

By adding a bigger turbo you will loose the 2500 rpm quick spooling and 4500 nose dive and switching that to 3000-3400 spool and holding to 6000-7000
Most everything with turbos is a trade off

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