There are two ideas I have on the /6 that I might do – if I ever get one.
Naturally aspirated and make (not sure how yet) a twin/tri-runner (and switchable) intake system with fuel injection.
Or
Turbo (or twin turbo) and fuel injection.
Back in the early ‘60’s Chrysler had come up with the long ram intake system.
Ram Theory
A variation of that was the short ram intake – which at first appearance looks like a long ram.
Then the cross ram used on the race Hemi’s came out (another variation).
Not a Mopar but to give an example of shorter runner length.
Pretty much all cars in last twenty years use a tuned length intake or variable length intake runner system – and most of them are plastic.
Variable-length intake manifold - Wikipedia
A /6 intake – um, not so much (tuned).
In my mind, I want to use a 3-D printer (or something) to make a couple of intake designs.
First is the long ram intake. I already have a set of aluminum long rams and would really love to install in my big block 5th Ave – but suspect it won’t fit.
What I would like to do is make a set close to it that will have a pair of throttle body’s on it (one per side) and 8 fuel injectors (one per runner).
Those intakes have four pairs of runners.
The difference between the long ram and short ram is the internal divider length (about ½ the distance at 15”).
The long rams - the tubes went the whole distance. These stop mid way - which you can see.
My thought is to make a plastic version of same intake and have 2 plates in it per tube pair (8 total). Already cast into the plastic is a 7½” (to middle of intake valve). Have a 7½” plate that either rotates or pops up to have a 15” runner – then the last plate, which will be 15” long) that will either rotate or pop up to create a 30” runner for low end power.
As RPM rise, at roughly 3,100 RPM, the longer plate would pop up (or rotate out of the way). At roughly 4,000 RPM the shorter plate would pop up (or rotate) so I could maximize air induction.
A more or less straight intake without any heat source close by “should be” fairly simple to make.
- - - -
I would like to do the same to a /6 intake as well – but not sure what to do about the heat source (exhaust manifold/header) or how to get that long of an intake stuffed under the hood.
- - - -
The Magnum engines with beer keg intake are using the 15” runners. The new Hemi’s (and most other Chrysler engines) use a variable runner intake (7½” and 15”). The 3.5L engine uses 7½” and 30” runners.
No matter what, getting rid of the un-equal length /6 intake and adding fuel injection (either throttle body or port fuel injection) should help a /6 a lot.
Turbos – even more so.
My thoughts on the matter,
BudW