How can you say that? Only if you spend money porting, going OS on valves and/or camming a 12v is it going to flow more than a 24v on the same boost.

 

ever think about why they put runners on high hp engines?

 

They put runners on because the intake is milled off the head to port the intake side better. What is your point?

 

that is not the reason they put runners on.

Look how the ports are on a 24v vs a 12v.

http://www.zzcustomfabrication.com/head_porting_08.html

 

They need runners because the intake is milled off.

 

i swore i thought i read somewhere the 24v head only flows a few cfms over the 12v head, not worth the time or money swapping

 

There are many intake manifolds that dont have runners.

They need runners to separate the ports to prevent "distortion" between the cylinders. 24v ports share two valves so they will not flow as much in high performance applications.

 

When you mill the intake off you need them either way.

 

Yup that's true. In stock form they are pretty "close" to each other.

 

Maybe not worth the money because of the expense, but that's a lot of personal opinion on what money is worth. I dont have the money, but others might.

Milling the intake off, porting and making new intake manifolds is serious work. I can make my lawnmower head flow more than a 24v with enough work and money.

If the same is done to a 24v head, do they still flow more than a 12v?

85_305 is partially correct. When dealing with forced induction, flow is not always a big deal and can be easily overcome by more boost. Still, the more efficient an engine is, the more power it will always make. The same setup with only one better flowing part in the system will make more power.