anybody know how to port and polish could yas give m sum pointers?

Question

i wana port and polish my 503 in my sled i need sum pointers

Answer 1

In general, to port and polish an intake/exhaust flow path you have to smooth out any sharp corners and round them as best as you can without damaging or removing too much material such as to render the assembly too weak for attachment, torquing, and the strains of combustion. What I do is to lay the gaskets onto the surface that needs to be sealed and trace this shape onto the metal. This gives the minimum sealing area required for the gasket to seal the two parts together. Like I said, this is the minimum as the gasket will tend to deform as it is torqued so do not go to the minimum. Once determined how far you can trim away the excess metal, carefully shape the flow areas to a more gradual or circular shape which makes the gases flow or swirl to improve performance. Keep in mind there are several ports and passages inside these heads and intakes that you don't want to cut into as you will have made a big paperweight. Once the porting is done, the whole internal flow area has to be finely sanded or polished so as the flow does not tend to stick to the sides of the head or intake.

Answer 2

If you want to do it. Just make the holes smooth. Be careful not to remove too much material, you don't want any holes in the ports.
There's some port and polish shops that know exactly how much material they can remove and still keep the strength intact. That would be the best.

Answer 3

That is not something you do yourself unless you maybe own a machine shop. Send the head to a professional and have it done correctly.