What are the main benefits of individual runner intake manifolds? Velocity?

 

To be able to port and polish intake side of head.
and better air flow.

 

For me, it's about velocity on the vacuum side and equal amounts of boost of the charge air side.

Charge air motors are less effected by the aggressive port and polish and are usually better helped with simple clean up. All of which can be done at hone with some simple templates.

Dave

 

Basically you would fix that restriction problem of air going into cylinders #1 and #6. How you going about set-up up the intake. Kinda like this.

John, you getting your truck together so you can go beat-up a few common rails.

 

I like that, and have never seen it before on a Cummins. Does anyone have any pics of the modifications done to the head?

 

I never made one yet, I just downloaded the picture off of comp D.

I don't want the 3in collection tube for mine as I want more of a header set-up as it should share the air flow/distrubute the air better than this design. Cutting off the intake isn't to difficult. Glueing it back on is a different story.

http://www.competitiondiesel.com/for...ad.php?t=53173

 

Here is another on one that has me drooling..... I think I might do it.

 

And Mike, the urge has hit me again to do a little tinkering on the 12v. Might have it ready for the November 2010 dyno day!

 

That probably be a good day for a smokey dyno bash. That zz manifold is pricey. Brett and I are building one for our truck. I'll snap a picture and see if you want one. I might be able to swing another 12v head into the shop to hack off that intake plenum. I'll keep you up to date. Worst case, ZZ has one Brett does some pretty nice work.

 

Please correct me, but it seems that these styles are only a little better than stock in that the highest air flow will be available to #1, and slightly decreasing all the way back to #6. I understand how the stock built in has angled ports blocking flow to #6, and my understanding is the flow issue to #1 is distance from incoming.
I've been thinking about this myself for a while- leaning toward a header style as well by theory.

 

justme, First off, just try and port the intake side of the plenum. You'll see why you cut off the plenum. Both #1 and #6 are very restrictive. Secondly, put you fingers in there and pretend that your a molecule of air trying to get into those cylinders. Now try to cram in lots of air.

 

Swamp you going to run an intercooler? That ZZ intake is set-up for an intercooler. Did you ever put any miles on that whizzy new motor of yours?

 

They must be worthwhile.
Every factory turbocharged 4 cylinder car I have owned in the last 20 years uses a runner manifold.

All the ricers got them too.

 

No miles on the motor yet. Might make a few phone calls and find a milling machine and chop off that big ugly piece of iron on the intake side of things......

 

Looking at those intakes, I wonder where the injector lines going. I'm going with hand bend lines (custom fit), another disadvantage of the 24v head.