Begi Intake Manifold
11-23-2008, 10:31 PM
#181
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...
Reply
0
0
11-23-2008, 11:53 PM
#182
Junior Member
Join Date: Apr 2008
Posts: 349
Total Cats: -2
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.
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.
Reply
0
0
11-24-2008, 09:32 AM
#183
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
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.
here you go:
looks like the RSX-S has a similar design to what you're really talking about:
Reply
0
0
01-07-2009, 05:16 PM
#196
Former Vendor
Join Date: Jun 2006
Location: Bell Tuning & Performance
Posts: 1,337
Total Cats: -99
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
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
Reply
0
0
01-08-2009, 05:17 AM
#198
Former Vendor
iTrader: (31)
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 15,442
Total Cats: 2,099
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.
Reply
0
0
01-08-2009, 08:52 AM
#200
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.
Reply
0
0
