#ALUMINUM HEAD PORTING KIT HOW TO#
#ALUMINUM HEAD PORTING KIT FULL#

There are more places that believe in this theory than not. And we all know if it were easy, everyone would be doing it. ItвЂ™s super easy to make a port as big as it can be. The reason being is that when you make the walls of the port too smooth, the air moves so fast and sticks to the walls of the port such that the fuel falls out of suspension, causing inconsistent fuel delivery to the combustion chamber. It didnвЂ™t work then and it wonвЂ™t work now. The man was working with Smokey Yunick back in the 1960s (look that name up on GoogleВ if youвЂ™re unfamiliar with Smokey, heвЂ™s a racing legend and innovator on a level few others could touch) and when they ran stuff in NASCARВ they tried mirror polishing on the heads.

#ALUMINUM HEAD PORTING KIT HOW TO#

If there was any real basis for dimple ports, youвЂ™d be seeing it in high-performance factory engines andВ professional levelВ race engines and thatвЂ™s simply not the case.Д¬harlie Kulp taught me how to grind. So, the only true advantage I see in dimple ports is if youвЂ™re playing discus with the cylinder head and want to see how much farther you can throw it. So the dimples would (in theory) help create this boundary layer of air that would keep the fuel off the wall and in suspense and atomized.ДЇirst off, more than likely you have an engine withВ modern fuel injection if your reading this.В Modern fuel injectors do an excellent job of atomizing the fuel, especially with todays engines where injector location isВ engineered very carefully for optimized delivery.

In a port, we are looking to create a situation where fuel stays off the wall of the port. The argument is that it works on golf balls because it creates a boundary layer of air and helps it move the ball faster and farther. W hile we are on the subject, we should touch on dimple ports. However, because there are cylinder head guys out there who do such a poor job hand porting, seemingly haven taken lessons from a blind person with a hammer and a chisel, they help perpetuate the myth that CNC porting is more accurate or вЂњbetterвЂќ. Talking about consistency machining an inconsistent part makes no sense except to market it as the best option. So, instead of waiting weeks or months to get it back from the machine shop, someone with a CNC could rip through it in a few hours and have it on the floor ready for machine work. While a CNC is better than a hand at many things, when it comes to porting your factory cast cylinder head it is really just faster, meaning itвЂ™s faster than any human could grind and sand your head. Meanwhile, a hand knows the center of that port every time. ThatвЂ™s because the CNC machine does not know where the ports are, just where they are supposed to be. You can even see where theВ CNC did not touch the casting in one port but did in the others. In fact, in the head there is no ports that are the same. ThatвЂ™s where the words вЂњcore shiftвЂќ comes into play, because when we get cast heads back from the CNC shopsВ there is not one that is exactly the same. I say this because the factory head is cast, which means there will be some variation from head to head because of the imperfections that come from the casting process. But when it comes to CNC machining a factory cast cylinder head, talking about the accuracy of the machine is a moot point.

If your making billet heads, the accuracy of theВ CNC is worth talking about, because youвЂ™re making something from scratch and making a batch of themВ ensures that they will all be the same. T his one depends on the piece in the machine.

#ALUMINUM HEAD PORTING KIT FULL#

Dave and his team have amassed a huge amount of experience and expertise and are now creating some of the best performing cylinder head and cam packages for both domestic and import vehicles,В be it forВ street/strip useВ or full blownВ race applications. About the Author: Dave Localio is a long-time friend of ours and the owner/operator of Headgames Motorworks, a cylinder head specialist founded in New Jersey in 2001.

Aluminum head porting kit