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      01-30-2012, 06:48 PM   #9
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Drives: Z4 sdrive35i
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Quote:
Originally Posted by Voytek View Post
And how is the difference in boost achieved? Does the 20i have an intake restrictor or something on the turbo or is it just a different turbo?
The 28i has a physically bigger turbo than the 20i, limiting the amount of power increase you can get out of the 20i. For now, 220hp is what tuners are comfortable with for now. There's a limit to what you can get out of the small turbo. The bigger one can be tuned to almost 300hp.
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