Home Port Job :D

[Racer51]

Well I finally got done with my porting today. As you can see I did pretty good for my first time. Everything in the head and exhaust port is nickle slick smooth and shiny. Just like it should be, the pics below are over 5 days total and were done in 2-2 1/2 hours at a time once a day. They are in sequence so the best is for last. PS I'll also be posting this exact same thread in PIC/VIDS or off topic. So that many people can see what a good amount of patience and an eye for detail do for ya in return.

 

[scotj77]

looks good. now the intake but don't make it shinny

 

[Racer51]

I did clean it out with some 80 grit and made my refinements but it wasent worth putting pic's up to me cause it isint hoged out or anything just some black paint/soot IDK what ever it is on the sides so I left it alone and I'm happy But if anyone wants I might be able to put a pic or 2 up later tonight.

 

[Larry's Shee]

Is the ex port same size as your head pipe/flange or gasket? Clean any casting flaws in intake and bevel bridge to almost knife edge. Have you done anything to bottom of transfers?

If I was smarter I'd post pics of mine, LOL

 

[Racer51]

Is the ex port same size as your head pipe/flange or gasket? Clean any casting flaws in intake and bevel bridge to almost knife edge. Have you done anything to bottom of transfers?

If I was smarter I'd post pics of mine, LOL

IDK that's the one thing I havent done yet. lol :-[ second part yea I was thinking about that cause there's some obvious ones down the middle in the bottom of the intake. But I diddent know what to do (that's why I'm here). Transfers were remarkable and so I left those alone. Cause there werent any burs/odd bumps and were pretty smouth in all. Except a slight part that wasent flush so I took care of that. Also the bridge was good as well as taper no bumps or flaw/burrs. I'll put pics up late tonight or tomorrow in detail to show you ok.

 

[Surfrjag]

How much did you raise and widen the exhaust port?

 

[Racer51]

The side faceing the cylinder or the exit side? faceing the cylinder none but exiting I think I wrote it down it was...20 thousands of an inch I think all said and done in total diameter or 1/10 of a mm in one spot all the way arround. So yea 1/5th of a MM......yea 1/5 of a mm. By the way for argument's sake what do I have to do with the pipe/flange gasket?

 

[Larry's Shee]

Have you watched this yet? I:I http://www.blasterforum.com/engine-13/cylinder-porting-diy-25773/

 

[wwholden]

Did I miss something? Why would you want to polish the heads squish dome?

 

[Blaaster]

There is a lot of interaction up there in the squish area, gases flow more freely without restriction.

 

[wwholden]

How do you go about polishing the head? Dont believe thats in KORs how to right? Is it really worth it?

 

[Racer51]

There is a lot of interaction up there in the squish area, gases flow more freely without restriction.

Yep, you can tell that area gets a lot of action from carbon deposits cause it's all black like in the first picture.

Have you watched this yet? I:I http://www.blasterforum.com/engine-13/cylinder-porting-diy-25773/

Yea but not in a bit cause I have dial up which takes a while anyway. I'll watch it again. As I only saw the first 3 and a half out of the 4 at the time... ok thanks larry

How do you go about polishing the head? Dont believe thats in KORs how to right? Is it really worth it?

The way I did it was take out all /quite a bit of the nicks but generally loosen the carbon up so it's easier to remove. I used my 200 grit sand paper then used me blue stone bits and went over it back and forth like brush strokes or welding. In oval circles side to side like welding is kinda lax.

Anyway when it's rough I sanded all around in 6 segments from where the bolt hole is to the next one over and over arround and arround till quite a few of the nicks and soot were out and everything was pretty smouth. Then I had some 600 grit sand paper and rubbed out with my hands over and over for a few hours on both bowls in the same direction. Then I had some pretty nice metal polish I think it's called California Custom, it's purple and works great with everything else. So I poured a drop or 2 at a time cause it potent and goes a long way.

Hooked up the white cloth polish wheel on my dremel and went and polished both bowls. Now because this stuff turns black when it works I kept working the line. I did this untill the black metal residue/soot that sticks to the metal simply blows off, or wipes off pretty easily if your more of a hands on person. So I worked it in a little more at an angle so it blows off, I did this at least 5-7 times arround in both bowls untill I got that brilliant shine.

I used this same technique for the inside of the exhaust port.
The work in polishing the head was less mitculus and more straight forward. But as I understand it it's supposed to compliment the freshly/cleanly done exhaust port, and help overall. I hope the first three parts helped holden

 

[wwholden]

Makes sense..... Ill have to do that next time I pull the head off mine!

 

[best]

How do you go about polishing the head? Dont believe thats in KORs how to right? Is it really worth it?

There is some debate over head texture.
These heads below have a matt type texture that are supposed to be less conductive of heat and yet do not seem to carbon up any easier if the jetting and oil are right.
This surface finish is not rough machined, but was polished and then soda blasted (like glass beading).
The idea is to have a closely held boundary layer of trapped air that insulates the head surface ever so much.
Too much roughness increases the surface area and acts like a radiator absorbing heat from the flame into the head, so you don't want to do that.

The head on the far right, yup the clean one, has many, many highway miles on it.
Several years worth of combined highway running and off-road.
Jetting was pretty darned good (leanish) and oil was 40:1/50:1 of good quality synthetic.

 

[Racer51]

Ive seen that picture before I cant remember what post but it was fairly recent. What is the debate over head texture?? As I am unaware of this...Glass beading I must say i'm not familiar with that as well. do go on
On my head there some obvious signs of no flat-nessand or texture (if that's a word) but it is extreamly smouth and seamless to the touch though.

Thanks larry I watched and figured it out thanks again

My impession from ken and another builder in my area was cleanless was closer to godliness. As we can do a fantastic job and still not expect exponential results but can expect rather to make things better.

I asked for an anology from ken he asked what kind of pizza do I like I said well...bacon pizza and he said well I really like bacon pizza but the porting your gonna do will end up giving you a tad of bacon on that dog bone/pizza crust your gonna end up with because of experience and knoledge and exc. exc.. (His words not mine.) Just putting it out there. But the head and exhaust port I figured should match in likeness. My belief