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The fact that it uses ~50% more fuel AND puts out less than half the power of my new Mack says a lot about effiency. One advantage it has over a hot rod [in VE] is the low rpm keeps CFM down. Usually the worst intake tracts respond the best to some grinding. JimK

Just to point out the obvious- extra air filter capacity- because they get dirty.JimK

Well voltage is more important to a spark plug. Amps rule when stick welding (both are arcs). As for trucks, at risk of crossing over to the realm of junk science, I can offer this.I drive a little rig tractor trailer. I say 'little' because we use 'city' tractors for road work., 99% it's a...

I would argue they both "matter". I just put 'HP torque formula' in goggle to make sure I don't butch the equation for a reply. The top hit looks like it should answer this faster than I can type something .While it's context is cars this issue matters even more with trucks (I need to wrench...

RE: Re: RE: Exhaust Flow air flow in lb/min at 5/10psi. Sorry don't have time to find the formula for converting to CFM. http://www.steelsoldiers.com/index.php?name=PNphpBB2&file=viewtopic&p=111182&highlight=#111182 The naturally aspirated engine might have peak volumetric efficiency (VE)...