ls cross ram dual plenum intake

[jlcustomz]

Started making my own intake a few years ago. Recently pulled the project back out & got back to work.
Cut an LS1 manifold apart 3" up from heads. Matched 8 stainless tubes to shape.

Initial rough mock up.

Put a little more shape in the pipes, Made bell mouths (velocity stacks) & started making plenums form light gauge stainless. To be mirror polished when done.

 

[jacobdavis1979]

That looks pretty sweet!

 

[jlcustomz]

Mockup of aluminum plenums to replace stainless I was making.

 

[MrLightning]

WOW! very cool looking project. I admire your creativity. Whats the over all intent? is this simply for conversation and KOOL effect? Don't understand what would be gained otherwise, please enlighten.

Nice job!

 

[tetomas]

What do you have in mind for the throttle body? Maybe dual throttle bodies? Any plans for an actual running version or is it just for decoration? Love to see it run and get some dyno numbers, bet the torque numbers will be beast down low!

 

[jlcustomz]

The only cross ram dual plenum intakes on the market are like $5,000 up , a little out of my price range . This type of intake design is superior in all ranges of output on power production over the factory compact designs. They feature a longer ,straighter shot of air to the cylinders,velocity stack entrances to the runners to increase airflow, & more plenum area.
Disadvantages are complexity , cost & size. On size, guess what;;;;; I got a g-body, more room.
I will be making a 2 into 1 for a single throttle body, the front tube on the left in the last pic is the start of it. Stock throttle body to start off with (cost) may go bigger later.
The spike cones up front are decorative (why the **** not??) ,the sanding & buffing I will do is decorative, But the design is pure function. I got some advice from AFR & the lead engineer on the LS7 production intake, along with a lot of research of common knowledge in design. The runners are a little on the long side for torque, but are large enough to flow plenty at high rpm.

I'm trying to see if I can possibly finish before an oct 4th all gm show, which would not leave me time to make a few trips out of town for dyno tuning.

 

[jetsetw31]

Nice work. I always loved the cross stack set up. Both the cross style and the straight style are worth about 100hp over stock on the old small block Chevy. I always wanted one with side-draft Webbers.
Keep up the work.
T 8)

 

[jlcustomz]

tack welded runners to the velocity stacks, no more rubber connectors.


Disassembled to weld up.

 

[jlcustomz]

Got a little more welding & polishing done.

 

[jlcustomz]

Trying to explain what a cross ram dual plenum intake is to most people, especially an unfinished one, is no easy task.