[bill dedman]

This turbo source limitation is just another facet of NHRA's iron-fisted approach to "keeping the cost of racing down," like their across-the-board BAN on pneumatic valve springs.

Formula I has been using pneumatic VALVE SPRINGS (NOT actuators) exculsively, for many years. The outrageous price of a set of Titanium valve springs for a 10,000+ rpm motor with 1-inch + valve lift (Pro Stock and Top Alcohol Funny Car come to mind) has to be a major part of those teams' budget, because thy only last a few runs... but NHRA is keeping the cost of racing down...

Gee, I wonder how that ACROSS THE BOARD BAN ever got into the rule book???

Multi-valve, F-1 dohc engines that spin 20,000 rpm and have to last for many miles, have a formidable engineering task when it comes to valve springs; they choose AIR.

I'd bet that a 2-valve drag racing engine that spins HALF those RPM's for a few seconds, would be a cake-walk for the design engineers at Del West engineering in Arizona...

Just sayin'...