let me say first that i am sick of trying to use parts that will never work.
so i quit trying and have purchased a brake and sheet metal, tubing to do the job.
the tubing is 1" x 2.5" x .064 aluminum tubes. the sheets of aluminum are .085 thick.
here are the basic parts. they are not welded so their shape is off a little. they are also just mocked up for this picture. the runners are 11" and 14". it will create two distinct torque peaks. one at ~3900 the other at 4700. one thing that shows up in the modulars is a torque loss at 2900-3600 with bigger than stock cams and 11" or shorter runners. i left the cmc plates in the lowers. if i change the pcm to an 05+ pickup truck part, the VCT and cmc will come in handy. they are wired open for now.
so there is the secret thingy.
also the runners are parallel and vertical so they can be cut and shortened or lengthened based on dyno results. the plenum will be exactly as tall as the 4.6 part or 8" tall before adding provisions for a TB on top. i can put the TB opening anywhere i want it. i will probably weld a square bore holley flange to the top. this is a wet manifold, so carbs can be used with an 8 psi fuel pressure regulator and 6an return line. or it can be used for fuel injection. i have 8 injector bungs ready to weld on. carburetor will require a TPS to be fitted to use my current PCM. otherwise an MSD unit will work.
i am going to fuel inject if first. -b
the lowers are from a 4.6 3v cmc plate set. it gives me something to weld to in the start, and saves money trying to get cnc deletes.
so i quit trying and have purchased a brake and sheet metal, tubing to do the job.
the tubing is 1" x 2.5" x .064 aluminum tubes. the sheets of aluminum are .085 thick.
here are the basic parts. they are not welded so their shape is off a little. they are also just mocked up for this picture. the runners are 11" and 14". it will create two distinct torque peaks. one at ~3900 the other at 4700. one thing that shows up in the modulars is a torque loss at 2900-3600 with bigger than stock cams and 11" or shorter runners. i left the cmc plates in the lowers. if i change the pcm to an 05+ pickup truck part, the VCT and cmc will come in handy. they are wired open for now.
so there is the secret thingy.
also the runners are parallel and vertical so they can be cut and shortened or lengthened based on dyno results. the plenum will be exactly as tall as the 4.6 part or 8" tall before adding provisions for a TB on top. i can put the TB opening anywhere i want it. i will probably weld a square bore holley flange to the top. this is a wet manifold, so carbs can be used with an 8 psi fuel pressure regulator and 6an return line. or it can be used for fuel injection. i have 8 injector bungs ready to weld on. carburetor will require a TPS to be fitted to use my current PCM. otherwise an MSD unit will work.
i am going to fuel inject if first. -b
the lowers are from a 4.6 3v cmc plate set. it gives me something to weld to in the start, and saves money trying to get cnc deletes.