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drake12
Bone Stock
Posts:3
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| 11/02/2009 6:44 PM |
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has anybody tried doing port and polish on their vehicles? i saw this website selling port and polish kit. Is this worth it? |
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IndyToy
Bone Stock
Posts:45
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| 11/04/2009 7:02 PM |
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Porting and polishing can be tricky. But at the age of 16 i ported and polished a whole motor the heads intake and oil valley. So anyone can do it. Since your in the toyota section i assume we are talking about a toyota motor not sure what motor you will be porting and polishing and that lays a major role in whether our not its worth it.
1. 4cy 22r motor series probably not woth doing the less air restiction is nice but then your going to have to get more fuel in it.
Ill put it this way i just did a set of ford heads that i had on my old ford truck i sold. I only did the inake side. I did see some power but the motor was completly built.
I guess to answere you question its not supper hard. You line the gasket up over the the holes spray the gasket with spray paint and then the paint left after you remove the gasket you just grind down and then polish it with a fine grit role off used on a die grinder.
If your not going to build a high horsepower motor then its not worth doing. Just my 2 cents. |
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MIDWEST4X4.US |
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webby4x4
Forum Admin, Magazine Editor
Rock Star
Posts:2351
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| 11/17/2009 10:24 AM |
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I'll throw in my .02 cents on this... I've never been a big fan of porting and polishing unless you're building a serious race motor. The benefits you get from this are negligible and very difficult to see or measure. I've talked with several engine builders at some of the most famous race shops over the years and get similar answers - "We do it because the customer asks us to".
There is little data to support porting and polishing, and there is even some data that suggests that it hinders performance slightly too. One of the common theories against doing this is that in a normal intake manifold and head, that the rough surface helps to keep the air somewhat turbulent, thus keeping the atomized fuel/air mixture in a state that is as close to gaseous as possible. When you polish the passageways and have a smooth surface, some tests have shown that the fuel collects on the sides of the walls and forms droplets, that get sucked into the intake as a liquid, not a near-gas mixture like it should be.
Engines run best when the air/fuel is a mixture that is closest to a gaseous state, which is difficult to produce, even with today's injectors. At best, they can produce a fine mist, but not a gaseous state. So, when you port and polish, it may have the opposite effect. At least this is what I've been told by several engine builders over the years.
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Rick Webster
Editor, 4X4REVIEW.COM - A Tork Media, Inc. Publication
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'74 FJ40 Land Cruiser
"Measure once, cut twice" |
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