dhirocz
09-29-2008, 11:41 AM
Anyone know where I can find a chart or something of recent cylinder head intake port dimensions? Everything I've found gave me a 'range' because it's referring to the gasket...
I am looking for the actual intake port dimensions/CSA as well as the minimum CSA. I want a head that flows pretty well in the midrange and on top with ports that need MINIMAL work...ie widening the pushrod pinch or a slight portmatch. Dont want to hog out a CNC head, just touchups. Head has to work well down low since I will be using a rather small cam, in the 226/232ish range @ .050. Not decided yet. I am kind of on the fence between AFR 195 and 210 eliminators, pending port dimensions and CSA info.
I'm building a 427 torque motor with a first injections TPI intake. Using online calculators, it calls for a 2.42 sq.in CSA for peak torque @ 4000 RPM, equating to roughly a 1.76" ID intake runner, which is my guideline for porting (extrude hone). I will most likely go to 1.78" to account for frictional flow losses due to the length of the runners and to keep away from terminal port speed.
Can anyone steer me in the right direction here?
I am looking for the actual intake port dimensions/CSA as well as the minimum CSA. I want a head that flows pretty well in the midrange and on top with ports that need MINIMAL work...ie widening the pushrod pinch or a slight portmatch. Dont want to hog out a CNC head, just touchups. Head has to work well down low since I will be using a rather small cam, in the 226/232ish range @ .050. Not decided yet. I am kind of on the fence between AFR 195 and 210 eliminators, pending port dimensions and CSA info.
I'm building a 427 torque motor with a first injections TPI intake. Using online calculators, it calls for a 2.42 sq.in CSA for peak torque @ 4000 RPM, equating to roughly a 1.76" ID intake runner, which is my guideline for porting (extrude hone). I will most likely go to 1.78" to account for frictional flow losses due to the length of the runners and to keep away from terminal port speed.
Can anyone steer me in the right direction here?