Cylinder Head 204 - Porting & Polishing
This is a first-generation 1992 1.6L Hyundai Elantra small-combustion-chamber head. Thats what it is. It's a J1 Elantra cylinder head. Good luck finding another one like it. (read more)... In Cylinder Head 106 I talked about the mainstream porting theories as they are discussed. We looked at a cylinder head that I have thousands of dollars of professional work performed on, and a bone-stock second-generation head that I didn't port. In this video I just might do something you haven't seen done before. For some, that may be uncomfortable. The port and polish job I perform here is what I think will work best for my current build. This is not an extreme killer port job. What will be different here is where port textures are concerned, I will be following the advice of a reputable source that will remain un-named. You're free to port yours differently than I do in this video, and I give you that out, around the 20 minute marker. The Hyundai is far from being an ultimate-performance build. It's a $400 box of scraps with nothing but time invested. It's perfect for this video. My finished product WILL be an improvement over what I had. I don't yet have access to a flow bench. I still have an achievement to un-lock. As far as you should be concerned with the techniques I employ... without flow numbers there is no evidence of what this will do, but we will gather lots of info from dynp sessions and drag strip time slips. If I could test it on a flow bench, I would. There are MANY, and when I say many, I mean thousands of flame war mongering pirates floating around on rough seas with a hair trigger cannon finger itching to fire if you port a head any differently than what the herd mentality says to do while porting a cylinder head. I cover the herd mentality because it has merit. It's been tested. Tried and true. But I don't follow it to the letter of the law. I'm definitely not here to de-bunk it. I would port a cylinder head differently for each build based on how that engine was used. There's an extremely valid reason why relating to air speed. It's not the texture of a port that maximizes the effect of fuel atomization, but the velocity of the air running through an x or y sized valve. The driving factor in this is the piston speed. I'm not going to give you the technical information, but will refer you to information about the Lovell factor. There's a better description of this in the links below, and even a calculator to help you find your engine's sweet spot. Why the Lovell factor is important: https://www.highpowermedia.com/blog/3346/the-effect-of-valve-size Lovell gas factor calculator: http://www.rbracing-rsr.com/lovellgascalc.html Only people who have flow testing equipment know for sure what really works and have the capability to produce a perfectly-matched port job for the ultimate performance build. Those guys know the definition of ultimate, and THEY are floating below the water Aegis-class submarines ready to blow your comment up if you don't know what you're talking about. They don't care if you're an armchair mechanic or a herd of pirates. I will say, they're zoomed in pretty close on me right now, and I'm expecting to take a few hits. My work will be tested based on Dyno and drag strip performance, and the results will be posted here. Fortunately, those kinds of videos are a WHOLE LOT EASIER TO MAKE!!!
How to Port and polish a 500hp Nissan SR20DET Head Part2
*****3 PARTS***** I show you a port job on a SR20DET S13 Nissan head,plus some good infomation for you on porting these heads and on tooling tips... PART 1 http://www.youtube.com/watch?v=FhhyOdFyAcE PART 3 http://www.youtube.com/watch?v=Rdc4HdO0ZXE
S15 SR20 How to fit k-line valve guides
A quick Vid on fitting k-line valve guides to Sr20det head
Cylinder head porting and polishing - how to diy guide
Liked the video? Help me make even better content by donating money without spending any money: https://www.gawkbox.com/profile/D4A Thank you for your support! In the video I say "Most of the power comes from properly shaping the short radius" - what is more true is that most power comes from "properly aligning the seats and bowls". The short radius is still very important, so don't overlook anything. The video above is a simple, condensed how to guide on cylinder head porting and polishing. It is meant for novice and inexperienced porters who want to know what is porting and polishing and how to do it with their own cylinder head. Its sort of a porting a polishing guide for dummies if you will. But it is also detailed and specific and guides the average DIY enthusiast in exactly what, where and how to do what needs to be done in order to increase the airflow and thereby the performance of your cylinder head. The head in this video is 4age 16v bigport head from the 4age engine from my 1987 Toyota MR2 AW11. Every cylinder head is different and there are variations in what should be done during a porting and polishing job. The specifics and details of this particular cylinder head porting and polishing job apply best to the 4age bigport head, but the general principles, tools and methods are pretty much the same for any other stage 1 mild porting job and watching this video will give you a better idea of what needs to be done and how much time is needed to successfully perform a porting and polishing job. Check out my blog for more MR2, 4AGE, DIY, and other content. http://www.driving4answers.com/ Here's a nice quote from the jafromobile channel: „There are MANY, and when I say many, I mean thousands of flame war mongering pirates floating around on rough seas with a hair trigger cannon finger itching to fire if you port a head any differently than what the herd mentality says to do while porting a cylinder head„ There is no better way to say it than this. There is no SINGLE RIGHT WAY of porting and polishing a head. Even when it comes to two identical heads (and no two really are). So before posting a hateful comment and telling me I just „ruined my head“ or started the next apocalypse, please have in mind that there are hundreds of different cylinder head applications and dozens of different approaches to porting. The porting and polishing work depends on the particular application of that head. This is a simple, mild stage 1 porting job for a mild 4age 16v bigport engine build. The goal was to improve airflow without drastically changing the shape of the ports. What can not be argued against is that improving airflow improves horsepower, torque and mpg. Porting and polishing improves airflow. This can not be argued against. Removing rough and sharp edges in the combustion chamber helps prevent knocking when engine compression is increased. This also can not be argued against. Everything else is the subject of debate so saying that the way someone ported and polished their head is horrible because it varies from what YOU think is right and best is wrong unless that someone used a hammer and chisel to port their head. Please do the research first and if that research objectively proves that something is wrong you are welcome to comment, and even then constructive criticism is far more helpful than insults. What I have done has not been based on my own theories or knowledge, but on the advice and material from people who have ported dozens of 4age heads and have proven benefits of their work. This video would not have been possible without the input, advice and help from people who have proven experience of porting 4age and other heads. So here's a special thanks to OST, without whose advice and help I could not have ported the 4AGE 16v bigport head you see in this video. Check out his porting services: http://club4ag.com/forums/viewtopic.php?t=300 http://s79.photobucket.com/user/oldeskewltoy/library/MOmo?sort=3&page=1 Music Beaster - Awakening - Free Background Music No Copyright Music https://www.youtube.com/watch?v=SRJGlq7Ov2U Beaster ► Facebook - http://www.facebook.com/BeasterMusic ► YouTube - www.youtube.com/watch?v=VdKhdbCWPyw ► SoundCloud - https://soundcloud.com/beastermusic ► Twitter - https://twitter.com/BeasterMusic ► Mixcloud - http://www.mixcloud.com/beastermusic/