Uploaded June 2016 | Updated September 2026, 2 weeks ago
Here was my first video on porting and airflow theory: youtu.be/51RmXBNbe7I?list=PLh_yB9HJ4Gi62n3o5MQxJSFbsvjMvLvtI
Here I cover theory of airflow through a cylinder head. Sure, it's theory without action, but education can guide choices and guesses as to what will help the airflow through your engine.
Regardless, it's fun to think about. :)
There is another video on YouTube which inspired me to make this video. It made me write an article about a few things I agreed with and disagreed with, as this is a topic which is so big, that in a way, I've spent enough time on this to call it a sub hobby to my work with cars. Check out my article: carmilespergallon.blogspot.com/2016/05/port-and-air-flow-in-practice-and-in.html Remember, I link to the good video here, but I also disagree with the video on some points, so be sure to read the article.
When one article isn't enough, I end up writing a second article. In this case, I only wrote another, what I'd call, a half article, lol carmilespergallon.blogspot.com/2016/05/port-and-air-flow-in-practice-and-in_25.html
Below is my standard disclaimer about being safe, not hurting yourself, and that going beyond your knowledge can be dangerous. That said, the greatest risk here is making your engine run worse, with less power. It's been said by David Vizard that many of these 4 cylinder engines actually have too big of intake tubes! Adding more space by hogging them out, probably won't work for the job I'm working on! That said, I'm going to try to do a porting and polish stage 1 or 2. Using the PCM and a MAF, I'm sure I can test airflow, not as well as flow bench which would move a lot more air than my shop vac. That said, David Vizard started porting heads when he was a teenager, so I got to have some guts and try.
At the worst, I can get another cylinder head for not much, an aluminum welder for a lot more, and add material during a reshape of the ports instead.
If you've read this far, I have a trick for you. In my first video, I showed David Vizard's idea about having 1 valve be bigger on a 4 valve design to create swirl on the intake side. I can't seem to find a larger valve to save my life, so I may be opening up the metal more behind the opposite valve. Since that'll slow down the velocity of the air, the opposite intake valve will actually have faster flow to create swirl! :)
Due to factors beyond the control of DE Nichols/AutoBravado it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DE Nichols/AutoBravado assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DE Nichols/AutoBravado recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DE Nichols/AutoBravado, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DE Nichols/AutoBravado.
Here was my first video on porting and airflow theory: youtu.be/51RmXBNbe7I?list=PLh_yB9HJ4Gi62n3o5MQxJSFbsvjMvLvtI
Here I cover theory of airflow through a cylinder head. Sure, it's theory without action, but education can guide choices and guesses as to what will help the airflow through your engine.
Regardless, it's fun to think about. :)
There is another video on YouTube which inspired me to make this video. It made me write an article about a few things I agreed with and disagreed with, as this is a topic which is so big, that in a way, I've spent enough time on this to call it a sub hobby to my work with cars. Check out my article: carmilespergallon.blogspot.com/2016/05/port-and-air-flow-in-practice-and-in.html Remember, I link to the good video here, but I also disagree with the video on some points, so be sure to read the article.
When one article isn't enough, I end up writing a second article. In this case, I only wrote another, what I'd call, a half article, lol carmilespergallon.blogspot.com/2016/05/port-and-air-flow-in-practice-and-in_25.html
Below is my standard disclaimer about being safe, not hurting yourself, and that going beyond your knowledge can be dangerous. That said, the greatest risk here is making your engine run worse, with less power. It's been said by David Vizard that many of these 4 cylinder engines actually have too big of intake tubes! Adding more space by hogging them out, probably won't work for the job I'm working on! That said, I'm going to try to do a porting and polish stage 1 or 2. Using the PCM and a MAF, I'm sure I can test airflow, not as well as flow bench which would move a lot more air than my shop vac. That said, David Vizard started porting heads when he was a teenager, so I got to have some guts and try.
At the worst, I can get another cylinder head for not much, an aluminum welder for a lot more, and add material during a reshape of the ports instead.
If you've read this far, I have a trick for you. In my first video, I showed David Vizard's idea about having 1 valve be bigger on a 4 valve design to create swirl on the intake side. I can't seem to find a larger valve to save my life, so I may be opening up the metal more behind the opposite valve. Since that'll slow down the velocity of the air, the opposite intake valve will actually have faster flow to create swirl! :)
Due to factors beyond the control of DE Nichols/AutoBravado it cannot guarantee against unauthorized modifications of this information, or improper use of this information. DE Nichols/AutoBravado assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. DE Nichols/AutoBravado recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of DE Nichols/AutoBravado, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained in this video is the sole responsibility of the user and not DE Nichols/AutoBravado.
