well i dont have any flow data simulation equipmanet or any other software to help prove or disprove any of the above. ive been doing this for approx 4 years now and havent built anything thats lost power on an engine yet. i wasnt as worried about plenum taper on this manifold as i am on my n/a manifolds because well this motor is going to be boosted. i wanted to make a nice big surge tank for the air to wait in until the valves opened, u know what i mean. i dont think stacking in the intake would be an issue in this being that there really isnt any dead floor area behind the #1 runner because its up against the plenum end cap back there. on an n/a manifold i understand what ur talking about with the rounded end cap and the vortex, i was actually thinking about doing marks simlar to that way but being that he needed it soon and i didnt have the materials for making it the way i wanted to i went ahead and went with a backup idea which is what u see above. i think its going yield some good numbers onces he gets it all together. oh and i calculated wrong when i measured the volum. the turbo plenum is 3.5 (not 3.7) liters and the n/a is 2.6 liters. there for the good words guys even though there wer some bad ones also.


mike