You risk:
* Rod and/or piston failure: The increased pressure puts significantly more load on the connecting rods and pistons, potentially leading to catastrophic engine failure.
* Bearing failure: Higher boost increases heat and stress on the bearings, causing them to wear out prematurely or even fail completely.
* Premature wear on other components: The increased stress affects various other parts, leading to shorter lifespans.
* Supercharger damage: The supercharger itself may also suffer from the increased stress.
In short: Don't do it without significant supporting modifications. To safely run a smaller pulley, you'd need numerous upgrades, including:
* Forged internals: Replacing the stock components with stronger forged pistons and connecting rods.
* Upgraded head studs: To handle the increased cylinder pressure.
* Tuned fuel management: To provide the necessary fuel for the increased boost.
* Upgraded cooling system: To prevent overheating.
Before considering a smaller pulley, seriously consider professional tuning and advice. A reputable tuner can assess your engine's condition and recommend appropriate modifications to safely increase boost. Running a smaller pulley without these upgrades is a recipe for a costly engine rebuild or even a total engine failure.
