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Message: [QUOTE="golfer, post: 236761, member: 266"] (volume) cc's has [I]nothing [/I]to do with nozzle size. (FLOW RATE) cc's PER TIME has [I]everything [/I]to do with nozzle size. for those not familiar with a HEUI injector... the (7.3L & 6.0L HEUI) injs are basically a syringe...a tube of caulk, if you will... regardless of how large a HOLE you cut in the end of the tube of caulk...it's still only 24 ounces... the size of the hole (nozzle size), the force on the plunger(ICP pressure) determines how quickly that volume will empty...or not empty...in a given time (injector pulse width). I'm not at all arguing that a larger nozzle will not increase the flow RATE of an injector...but for someone to say that changing nozzles somehow affects the total displacement (max cc rating) of an injector is 100% [B]incorrect[/B]. I could weld closed 5 holes on an injector nozzle...leaving only one hole to flow on a "200cc" injector... it's still a 200cc injector...but it would just take a long time to empty cutting the nozzle completely OFF of the injector (think single 1/4" orifice, LOL) also would not change the internal maximum displacement of the injector...it would still only flow 200cc's...it would just be flowing it at a fraction of the TIME of the 'plugged' nozzle... but I could set up a flowbench to flow these injectors (one tiny hole...one HUGE hole) side by side in a flowbench...and I could make them flow exaccccctlly the same amount of fuel in 1000 shots...but the requested DURATION (pulsewidth) would have to be long enough for the plugged up nozzle to empty.< think 7-8ms LOL... cc rating is an injs maximum capacity nozzle determines the rate. it's that simple. [/QUOTE]