I was reading the cam article by David Vizzard and saw what the single plane intake manifold design looked like. What other types are there? Dual plane, etc? Post pics of the insides of the different tyes if you have them. btw what type is the LT4 intake?

 

The LT4 Intake is pretty much the same as the LT1. The Intake ports are designed a little different, and the price tag is in the $600+ area.

 

Is it single plane?

 

single plane and dual plane manifolds have carbs sitting on top of them.

 

I was thinking that..you just cleared it up for me.

 

What about a cross section of an LT1/LT4, LS6 or FAST 90 intake manifold. Anybody know where to find it?

 

Google, Yahoo..
I am sure that are out there somewhere..

 

The ports are not designed different, just more material above them.

 

Same difference..
They are able to be ported out more than the LT1 Intake.

 

So if Im understanding this correctly, if you swapped a LT1 for a LT4 intake you wouldnt get any gains unless you ported the LT4???

 

GIZMO has posted this picture over and over in an effort to help correct all the misinformation out there.

If you machine the LT4 intake to fit LT1 head you just destroyed every "benifit" it had because the only benifit is the extra material above the port to seal to the taller LT4 head ports. TALLER, NOT raised as is so often said.

 

dual plane manifold means that each bank has its own individual runner system and the inlets differ, while the single plane both banks run on the same inlet and runner system.

So logically speaking the LT1-LT4 manifolds are single plane. If they were dual plane there would be a seperating wall splitting the manifold in two.

 

Except, the LT1 manifold has more plenum volume than most single plane manifolds. It's more like a short runner tunnel ram.