Not sure if this is the right form, but it has to do with my
crossfire injected project. It seems that a better(more even) distribution and
better flow would result from moving the top plate/swirl plates away from
the manifold floor.
True
This would also change the plenum volume.
True
What part does plenum volume play in the over all
scheme of intake design?
Lots, it basically controls what rpm the engine makes peak
torque/HP. Also, makes up for flow limits in TB (to a minor
degree).
How will increasing it effect performance, and is
there a formula for figuring the correct volume for a certain engine
combination?
Varies alot. Anything from one cylinders volume, to
1.5+x the engine's CID.
I would like to base the changes on something other
than physical restraints(hood clearance etc.), without having to try a bunch
of different combos with all the tuning and testing etc involved.
I have sone extensive porting mods to the cross fire
manifold. Making a 1/4" thick spacer for the lid made a large difference
(BTW, I'm running a 355 CID). Much better high rpm
breathing.
Also, ground out the ERG tunnel. Opened up the outside
pockets, and cut port roofs back 1/8" also. With enough cam 2"
butterflies also help.
BTW run it with a 1227747. I some wotk
but with the info from programming 101 makes it real sweet.
Grumpy
Kevin R