Updated: Ported and polished my head

[athlete3344]

I figured Id post up some of the recent work Ive been doing.

About a month ago I started constructing a valve spring compressor out of salvaged pipe, which I welded with an old arc welder I have access too. Overall, its not a bad tool, but can use some improvement. Anyway, the goal was to get all the head components out so I could port and polish the intake and exhaust sides, and polish up the combustion chamber.

I used Jafromobile's youtube video - 204 (or maybe 206) Porting and Polishing the Cylinder Head. I think it turned out pretty well. There are a few spots where I should have spend a hairs more time with the 80grit, but overall, it was a huge huge improvement over what was there.

If anyone has any questions, let me know, but Jafro does a pretty good job covering all the main points.

When I get my hands on the intake gasket, I will be enlarging the area a bit, and going over the outside of the runner slightly, but that area is much easier to work with compared to the valve side. I would recommend doing this before going through the hassle of porting and polishing.

Overall time spent grinding (and listening to the damn air compressor) was about 8-9 hrs. I expect the exhaust side to take about 12, and the combustion chamber to take about 6 or 7.

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[nitrouskris]

Haha it's only 12:52 in CA. Where I am now. Live part time here and NJ

Fixed

 

[pacn91]

What about shaping the mound around the valve guide? Anybody feel its worth the time?

 

[athlete3344]

This thread is Jafro approved! ...and I should be asleep.

Sweet!!

What about shaping the mound around the valve guide? Anybody feel its worth the time?

For both sides, I basically went around the entire runner with 80 grit trying to reach every nook and cranny possible. When it came to the buffers, the wheels were way too big to fit in the same channels the narrow 80/120 grit cones could fit. To fix this, I tried to reach every spot possible with the wheel on the intake and exhaust side, and slowly the wheel reduced in size. To speed this up, after I was finished with the main areas I could reach, I turned the speed up on the dremel a few clicks and went around where I could reach again. Eventually it gets small enough to get deep in the channels near the roof of the runners.

 

[pacn91]

what i meant was to shape the mound, around the valve guide, with a burr. In many of the heads that i have ported, I have shaped that area in effort to create more of a valley to flow through and around as opposed to a mound to tumble around. I realize that much of the air will try to flatten out and flow more so to the short radius turn. Some of the fuel will tumble through this area and i like to make for the "easiest" flow possible. Just a suggestion and I was wondering if any body feels like its worth the effort. Any improvements that I have noticed, from all the massaging, have been on a racetrack. These little extras may not matter on a street car. Just wanted to contribute and possibly hear what other info gets added. Its always impressive to see how much power that can be unleashed just from good polish/port work and the right cam(s).