To get the compression ratio right on your 406 with a blower
you will need to use a -30cc piston and open up the combustion chambers on your heads to 80cc volume.
If you really want a 144 blower use it on a simple low compression 355 short block with off the shelf forged -22cc dished 350 pistons and your full ported 72cc RHS heads (opened up a bit to 75cc) and a suitable solid street roller cam. It will go like hell.
2.33:1 blower drive ratio. 7" bottom 3" top pulley.
These 144 blowers become inefficient (heat the air) and tend to eat belts when spun faster than this. Require methanol fuel or water methanol injection to cool the charge air when spun faster. Heated expanded air is less dense, tends to detonate and reduces power and reliability unless intercooled or methanol is used.
Last edited by F-BIRD'88; 10-07-2012 at 03:40 AM.