Ported Turbo Manifold
Apr 6, 2006, 09:13 AM
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Ported Turbo Manifold
Stock is nice. Mine is better. Power comes on a bit earlier, and pulls harder downlow. o2 Housing is next. This was done IN-HOUSE. Here's some pics of the finished work. My cylinder head specialist is a Mondello School Grad. 1 of 3 top grads in the las TEN YEARS. So he's pretty damned decent. He didn't touch the floor (I know it looks as though he did, but CFM is commonly lost there) he just shined it up and removed some casting imperfections for the pics. Definitely a worth-while mod if you plan to stay OEM looking! Thanks for checking me out! Please don't post simply to "naye-say"....all comments, suggestions, questions are VERY welcome!
Apr 6, 2006, 09:30 AM
#3
Can't tell without the gaskets.
On the runners, it doesn't help to increase the openings unless the head is also ported to match. On the other side, you can port out a lot, though out to the size of the gasket. That's how all the BR stuff is done.
On the runners, it doesn't help to increase the openings unless the head is also ported to match. On the other side, you can port out a lot, though out to the size of the gasket. That's how all the BR stuff is done.
Apr 6, 2006, 11:02 AM
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"Gasket Matching"
Originally Posted by Warrtalon
Can't tell without the gaskets.
On the runners, it doesn't help to increase the openings unless the head is also ported to match. On the other side, you can port out a lot, though out to the size of the gasket. That's how all the BR stuff is done.
On the runners, it doesn't help to increase the openings unless the head is also ported to match. On the other side, you can port out a lot, though out to the size of the gasket. That's how all the BR stuff is done.
Power is not aceived through "gasket matching." That's an airflow "no-no" in the world of porting. However, if you were curious on seeing the port with a gasket over it for size reference, that can be arranged.
The head doesn't need to be matched to the manifold because the manifold is less perfect than the head. The stock casting had tons of imperfections and flaws in the initial casting. Those flaws were smoothed, removed, and the manifold was ported to direct air more properly into the turbine. The stock manifold actually left a nice amount of room for spool improvement. As mentioned in the thread, I don't feel or expect more power overall (maybe a couple ponies?), but spool up is DRASTICALLY improved.
For the record, the inside diameter of the gasket is larger than the entire runner. Had we "gasket matched" there would no longer be a runner.
Apr 6, 2006, 11:15 AM
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Currently looking for an Evo intake manifold. We will port it for cost of bits (roughly $50) and you pay for shipping. First come, first serve. We will offer 2 at this price!
Apr 6, 2006, 11:22 AM
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Originally Posted by BaseModelEvo
Currently looking for an Evo intake manifold. We will port it for cost of bits (roughly $50) and you pay for shipping. First come, first serve. We will offer 2 at this price!
Apr 6, 2006, 11:24 AM
#7
Originally Posted by BaseModelEvo
Power is not aceived through "gasket matching." That's an airflow "no-no" in the world of porting. However, if you were curious on seeing the port with a gasket over it for size reference, that can be arranged.
Originally Posted by BaseModelEvo
For the record, the inside diameter of the gasket is larger than the entire runner. Had we "gasket matched" there would no longer be a runner.
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Apr 6, 2006, 11:32 AM
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All i know is there's alwyas room for improvement.
Really the only way to get it "perfect would be to model the manifold in solids works and run it through a series of portins patters to see wich achives the highest velocity anf flow then have them CNC'd......
Really the only way to get it "perfect would be to model the manifold in solids works and run it through a series of portins patters to see wich achives the highest velocity anf flow then have them CNC'd......
Apr 6, 2006, 01:07 PM
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Originally Posted by Warrtalon
I'll be sure to pass this along to Dave Buschur. Maybe he can set even MORE records once he realizes he's been doing this "no-no" for so long. That would be awesome.
Let's not debate "gasket matching" as it will always remain a matter of opinion, even between two Performance Gods such as Mondello and Buschur. Many congrats to Buschur for his records. I love their stuff!
Originally Posted by Warrtalon
I was talking about the collector gasket, not the exhaust manifold gasket. I know the holes are way bigger than the runner openings.
As you may be able to tell in the pics, the collector gasket is a couple millimeters larger than the turbo and turbo manifold as well. Simply cutting away at all the material larger than the gasket would result in a large opening and no improved airflow. The manifold was ported to improve air flow direction and velocity into the turbo, no just create more volume overall. Thanks for your questions, it's nice some one knows what's going on, or wants to.
Apr 6, 2006, 01:56 PM
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You're funny. Alright, I'll have a friend post my stuff in his signature. All we're trying to do is help out the Evo community. Thanks again for the info.
Apr 6, 2006, 02:03 PM
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Not to hijack your thread but, I did the same thing to my factory manifold, and the factory O2 housing as well. I also ceramic coated them. See mine here: http://users2.ev1.net/~subaru/evo_web/evo_exhaust.htm
Apr 6, 2006, 02:12 PM
#14
Originally Posted by BaseModelEvo
You're funny. Alright, I'll have a friend post my stuff in his signature. All we're trying to do is help out the Evo community. Thanks again for the info.
The point is you can't advertise yourself or anyone else who hasn't paid their dues to reach this audience. EvoM is not your free advertisement area. Helping the Evo community is great, but there's hundreds of vendors doing that, and all of them have to pay to do so on this forum.