destroking

[GhOsT6_9]

When building a motor for forced induction you don't "destroke" the motor. You simply lower the compression with the proper piston dome/dish size to match your cyclinder head chamber.

For a street car you should run 9:1 or so, depending on boost to be used. For a race engine 8.5:1 or lower can be used, depending on boost again.

By adding a s/c with 10lbs of boost, you really make your motor go from 9:1 to ~19:1 compression, since your cramming the extra 10lbs of boost into the cyclinder head.

You crank doesn't technically turn slower or faster by changing compression, it stays the same.

The destroking concept lowers your total cubic inches of the motor and thus has less rotating mass which can then be revved higher. Whereas when you stoke a motor, you give it more displacement ( cu. in.) and more rotating mass, which forces the crank to turn with more force and at a lower RPM. Thats why the little Hondas can rev to 8000+ with no prob, since they only push 1.6L, as compared to your Mustang with 5.0L which is only around 6000.