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Old 10-02-2001, 02:04 AM   #6
2ndGenTeg
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Join Date: Aug 2001
Location: Boulder, CO
Age: 45
Posts: 830
The Si and LS engines have similar tolerance for boost. The Si benefits from a good R/S, and the LS benefits from stronger rods.

In general, the extra displacement from the 1.8L engines translates to more output from similar modification, including boost- meaning that the power gain from X psi will be greater on the B18 than the B16.
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