I know what the diff is in the 2. My question is, I've seen some divided manifolds where the runners are ran like the ones on the ramhorns, and some that are paired diff like say 1&3,2&4. I'm guessing it's for exhaust pulse. So my main question is....what's the gains by doing it one way over the other if there is any at all??? I'm gonna be going from a single scroll to a twin scroll and I have a ramhorn manifold that we r gonna mod. I've just seen it done 2diff ways and wanna know the benefits,pros,cons of the two diff ways of doing it. Thanks guys

 

You pretty much answered your question in your question. Haha, there is only one right way to route the manifold's runners to make the most of the engine's exhaust pulse energy to spool the turbo "mo betta" through a divided housing. The other option would be running a non-divided manifold with a quick spool valve.

 

http://performancespecialties.wordpr...turbochargers/

Correct pairing is 1-4 and 2-3, because the combustion is 1 full rotation away from each other and allows the pulse to be fully utilized by the turbo.

 

Yeah the quick spool valve came up as an idea in convo earlier w/my buddy, but prob just gonna get the manifold set up as described in SovXietday post. Thanks guys, I know what needs to happen now