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F20b = high compression (i think) .. aka not a good idea for turbo

H22 92-95 closed block design (i think) is decent for turbo but the VTEC makes for a new veriable the will make it harder to tune.

F22b will be best for turbo and easiest of the 3 to tune properly ..

.. even still Honda internals are BUILT FOR N/A. Turbo engines have different internal designs, most namely .. lower compression, stronger cylinder walls, different cam profiles, and prob. stronger valve springs and other internals all together.. i wouldnt put turbo on a stock motor unless you dont plan on boosting much.
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