Its all about flow!! whats holding you back....
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From: West Des Moines, IA
Car: 2008.5 Mazdaspeed 3 GT
Engine: 2.3 DISI Turbo
Transmission: 6 speed MT
Originally posted by BC GTA
Ok I can see that now. The connecting rods do not bolt to the center of the crankshaft. Rather they bolt to journels offset from the center of the crankshaft. So at this point the bottom of the connecting rods are moving through a larger circle than the crankshaft. While only 1 stoke in 4 is an intake stroke it occures at some degree less than in direct proportion to the crankshaft RPM. Thanks for explaining that.
So these heads are able to intake all that the engine can physically pull in. Why then would you need to port the heads or have bigger intake ports and valves?
Ok I can see that now. The connecting rods do not bolt to the center of the crankshaft. Rather they bolt to journels offset from the center of the crankshaft. So at this point the bottom of the connecting rods are moving through a larger circle than the crankshaft. While only 1 stoke in 4 is an intake stroke it occures at some degree less than in direct proportion to the crankshaft RPM. Thanks for explaining that.
So these heads are able to intake all that the engine can physically pull in. Why then would you need to port the heads or have bigger intake ports and valves?
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