Thread: DIY Head Porting
05-08-2007, 08:33 PM #1
DIY Head Porting
Well I was looking at the head and ports and saw there were quite a few places with slag and different areas that did not match up well.
So out came the air dremel and about $50 in porting parts.
I cut out all of the slag, blended all of the areas that did not match up and ran a round paddle wheel sander into the ports to clean them out.
Here are a few pics.
I still need to do some more smoothing out in a few areas but you get the idea.
To this point I have about 6 hours and it will probably take another 2-3 to get them how I want them to look.
I really did not intend to "port" the head just clean it really well. I know it looks Lots better than it did!
05-08-2007, 08:47 PM #2
Wow, that looks really good. What type of frapping wheel did you use?
05-08-2007, 08:53 PM #3
05-08-2007, 08:54 PM #4
It was a drum sander, then a paddle wheel type sander.
Some places I used an oval carbide cutter.
I got everything from Home Depot in the Dremel tool section.
05-08-2007, 09:33 PM #5
if you want to spend a little more time and make a difference, knock down the big humps around the exhaust valve guides. don't grind the actual bronze guide or grind it flat!
05-08-2007, 09:38 PM #6
I did think about cutting them down a little, maybe just radius them some?
05-09-2007, 08:06 PM #7
2-3 more hours in.
I sharpened the divider between ports to more match what everyone else is doing.
I also cut the bosses around the exhaust valve and smoothed out the entire area. Now that this is done the intake looks terrible in comparison so I may do those as well???
I need to do some more final finish work and may polish the exhaust side?
Here are some more pics.
05-09-2007, 11:28 PM #8
Looks good! Do you have any pics when the head was stock?
05-10-2007, 08:17 PM #9
Sorry Aaron no stock pics does anyone have a few they could post?
I was not happy with the slight inconsistency of the holes between the ports as they were hard to get them perfect as I wanted.
So i made a trip to harbor freight and got a roll sander that was 1" in diameter and 3" long. I used this to work in and out of the ports to make them all the same size, shape and angle.
I then did as GTXX suggested and cut the humps from around the guides and worked what was left of them into the port on a slight angle to get better flow around them.
I would have done more but the compressor died
Damn 80 gallon 6.5 HP couldn't cut it any longer.
So now all I have left is to clean up as much as I can in all the ports tomorrow and maybe contour the guide humps a little more and polish up the exhaust side and rough up the intake side a little.
Anyone see anything else that needs to be addressed while I am in here?
Also on of the pro's suggested since I was putting in the RR oil jet that I needed to clean up the holes in the middle of the head where oil drains down to the bottom of the motor so that it did not collect in the head due to restricted flow in this area. There was a Lot of slag in this area and it did need this really bad after looking at it.
Now to install my lightened valves, Nils Cam, and Riva Valvetrain.
I wonder if this setup will run 9500 RPM's
05-10-2007, 08:27 PM #10
Be carefull with the deck of that head! Too many scratches could cause a blown head gasket down the road. I can't wait to see you're results, looks good.
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