Are you planning on boosting your E90/E92 S65 V8 Engine? ... We have you covered!
Although the S65 does not have
thick walls in between cylinder bores, it does have one good quality – hard
aluminum. If the sleeves are installed properly, the block loses no structural
integrity. Meaning, the performance sleeves are quite thin, but radically
stronger than the S65 aluminum. Therefore, by installing the thin wall sleeves
properly, the great S65 block is now much more receptive to higher volumes of
boost than the S65 alloy can handle. By simply lining the block with the thin
wall, centrifugally spun-cast ductile iron sleeves, the cylinder bores can
handle 50% to 70% more boost than that of the Alusil aluminum bore block.
The boost can care less what
pistons it runs with in most cases. It’s the cylinder block walls that are
compromised first, not pistons. If the S65 block aluminum is poor, it will
fracture the block well before the pistons fail. That’s why we like to
re-sleeve these alloy blocks ductile iron material. Not to save the pistons,
but so the block can hold compression so the pistons do their job properly.
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