Hunter of Trolls
Join Date: Nov 2012
Location: east coast
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impossible.... for performance? how?
forced induction is, in effect, a displacement modifier.. if your engine is 6.4L displaced mechanically, it is likely nearing 6.0L dynamic displacement (considering valve events)... when you spool up to an increased atmosphere of 14.7psi, you've crammed twice the amount of air it displaces naturally- or 12.8L mechanical, 12.0L dynamic... you're, at that point, operating an engine precisely twice the size of the naturally aspirated engine...
twice the amount of air means twice the amount of fuel (taking for granted the a:f ratio doesn't alter).. more fuel burning with the proper amount of air present makes for a more eruptive burn... less air allows for a hotter burn, but not necessarily a more expansive (as in violent) burn.. the air is absolutely key- without it, you're igniting a very hot fire that has nothing to expand but itself- which it will, but with not near the force it does WITH air properly proportioned with it..
boost is where it's at.. there is no other way, short of mechanically interjecting 'variable cylinder/displacement', to make a better economy/performance engine.. the 'variable displacement' leaves a LOT to be desired while compared to boost (either s/c or turbo- hell, even nitro)...
Ferrari is on to something.. they have a variable compound angle on a camshaft.. imagine looking at a camshaft at eye level, from one end to the next.. the lobes have angles ground into them.. there is a tiny motor on the engine that pushes the cam shaft forward or aft, which initiates another valve train- which makes lift/duration alter on existing cylinders as well as possibly activating cylinders not in use until demanded... it's a very clever gadget- but it still doesn't allow for 'on demand displacement expansion' like boost does, and has been doing for many decades....
there is no way under the sun you remove boost from an engine for performance gains.. it just doesn't happen.. especially with oil squeezers, that spool up slow anyway..