Ford also made a manifold that I used on the ZETEC that had that full reversal of flow. The thing flowed great from 5000 R.P.M. but was a pig below that, I believe that was inhearent in the runner the design though. You could stick your hand in the mouth of those runners. (Yea I looked pretty funny with my arm in there just to try it.)That may be the best way to ensure even distribution though. The down side is T/B placement. I've been running my CosmosFlowWorks solver pretty heavy lately hunting for my optimal plenum design, I need more ram...

I was thinking about inverting the Cosworth Duratec design. Instead of Scott's 45-degree runners, make them straight, and maybe a little shorter. The throttle body would be above them in the stock location, and the plenum would wrap around downward. The exact implementation would depend on preserving access to oil filter, clutch slave, etc.

One European Audi tuner made a 1.8t manifold that was basically a straightened out turbine scroll, with the t/b feeding a chamber that tapered along its length, connected to the main plenum by a long slot. If done right, the flow through the slot would be uniformly distributed, and the charge would trade its velocity in the intercooler piping for pressure in the plenum very efficiently. That part of it might be something that would display very effectively using FlowWorks.

Summarizing my thinking of the afternoon, it makes sense to have low velocity in the plenum, and you want to do everything you can to keep the cylinders from screwing with each other.

here you go:

Attachment 209877




looks like the RSX-S has a similar design to what you're really talking about:

Attachment 209878

Cosworth and Honda on the same page. I'm in.

Yes, but they're on the same page when it comes to n/a designs. I haven't seen any marques using that design on a FI system yet.

K series love boost.

any news on the Intake manifold?

+1

They are going to test the stock replacement, on my car, probably next week. I was hooping to get it done this week, but Tim had other stuff to do first.
Stephanie

Send it to me, I'll weld it. :p

updates?

Pics of mine? :)

My Xede just got back today. So in it goes and then to the dyno. Then the intake manifold. Not quite on schedule, but it will make it.
Stephanie

updates?

+1 updates

My car goes to the dyno in a week for baseline tuning. That was the earliest we could schedule it. The Xede and injectors are back on/in it. When it comes back, the new intake manifold, with the longer/round runners, goes on. It goes for tuning again probably the following week.

I am going to try and make them put an EGR on it and more vacuum ports. We'll see how far I get with that one though. Corky does not want to make them EGR compatible.
Stephanie

the vac lines would be nice..

Edit: Any pictures?

Steph, I wouldn't bother with EGR. The only thing stopping me from ditching my EGR is the blockoff plate on the IM; if the flange didn't exist it wouldn't bother me in the slightest. I sincerely doubt the folks that are changing intake manifolds in search of power above 5000rpm care much about smog or legality.

For what it's worth, I'm going for 400+ and care about both.

I'd think from a sales standpoint that having those items would make it easier to sell. Vacuum ports is a no-brainer and having the egr makes those looking for smog legal happy, while those who are not, can just block it off. You could even provide a plate for at the request of the buyer.