6.1 Carb Intakes?
so there won't be any performance differences between those manifolds? Just the designs are different and the Indy is giving some more opportunities for later (maybe dual carb). Right?
Even better, 4 barrel, dual 4-barrel, Six Pack and even a blower are part of the options this design has to offer here...
A couple things about the Indy. The first thing you'll notcie about this intake is the humongous plenum volume which as we all know will destroy torque and throttle response. Indy claims to have combatted this with the use of short runners saying the air and fuel enter the plenum where it remains suspended untill an intake valve opens and voids a runner thereby drawing in the surplus remaining in the plenum on demand and as it needs it. I don't own one of these or even a hemi for that matter so I cant really comment on this, just lay out the facts.
The next issue with the Indy which I find, is the runner length. Again I can't comment on the performance here but it seems like this manifold will kill power and torque output untill your practically above the rev limit. Look at the Hyperpack manifolds and the Crossram manifolds chrysler produced. 16", 18-19" and 24" runners were incorparated into these various manifold designs for a reason. The name of the game is pressure-wave-dynamics / acoustical-tuning what have you. The idea is that when the intake valve closes, the moving gases pile up against it and become denser, this creates a wave (as the gasses pile up on itself) which travels up the length of the runner at the speed of sound where it reaches the plenum and turns around and travels back down the length of the runner at the speed of sound. If the runner is appropriately designed in length for the speed at which you want your peak power and torque, the valve will open right as this high pressure wave reaches the valve. Now the hyperpack for the slant with its 18 and 19" runners hit peak power at 2500 rpm if I recall correctly. Meanwhile there where two different lengths of crossram manifolds, the 16" hit peak power at 3200 rpm and the 24" at 2400 rpm. Indy's manifold has what appears to be 1-2" runners, so you can see where I'm getting at.
Just thoughts to chew on and maybe do some research to read into...
**disclaimer** runner length and peak power #'s on the crossrams are ballpark as my memory is spotty. Peak power on the Hyperpack might be off a bit too.