polishing ports on 202 head, backyard job , Please help

[vks]

hey guys a guy at work told me that i can polish the ports on my head at home rekons it will take bout a day or so. has anyone done this or herd of this being done with success?
any comments wold be much appreciated.
cheers vks

[vkberlina]

You can do a bit of a port job on a head at home, some things you wont be able to do and you wont get it as good as a pro would, but you can get close.
When you port a head 2 things are mainly considered volume and velocity. The head should really be matched to the cam shaft, both valve size, springs, & ports.

The biggest problem is getting each intake port then each exhaust port the same sizes. This is what will take time, matching the ports to your headers & inlet manifold. This can be done using the gasket as a template. Just make sure you dont go too far, check your water jackets.

You will need a Valve Spring compressor, Die grinder & Tungsten carbide bits
variety of grades of sand paper depending how far you want to go. I use a finger belt sander instead of doing it by hand.

You will need to completely disassemble the head and clean it, I would suggest using a spare head, just incase you stuff up.

Clean up your ports to your desire, then take the head to a head shop/machine shop to have new valve guides fitted, machined for bigger valves if wanted.
Buy yourself a VRS kit, it will give you all the gaskets you need including valve stem seals which you will need when you reassemble your head.

cheers
Scott