I know a few people have done this and im thinking about doing it with my spare head to change over post IVA (unless i get time and money to do it post IVA).

I know the basics but have never done it before and wanted to knwo if there was a good step by step somewhere out there

Theory and practice of cylinder head modification , practical gas flow?

google is your friend, as indeed it came up with this - happens to be posted not too long ago on here.

http://www.torquecars.com/tuning/Porting-polishing.php

frist ste[ is to match inlet/oultet to gasket and smooth but not polish the casting surface.

next step is to open out he ports - thats where as bit of tnought/knowledge is required.

on my crossflow, I used socked to drop through the ports to match them to size and to open out - risky work as you can break into a water way or as in one case, through to the exhaust bolt hole.

what engine?
What head?

Polishing does nothing just makes you feel better, porting does help depends on the engine i.e Pinto head has huge ports so work is needed in the area behind the valve seat but no need to open the ports unless you have serious flow needs.

You can make a big mess if you port your own head without having some way of measuring the results.

Research, take stock and start easy

Jaguar 3.6 AJ6

Read David Vizard

quote:

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Originally posted by Rod Ends
Read David Vizard

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Port matching and smoothing things should deliver good results.

First thing is to get some HSS burrs off Ebay, no point mucking around with grinding stones.

I then got a £5 drill to run them, unless you have a compressor which can sustain a very high CFM rate then electric is the way to go. As you will be loading the drill the wrong way get something that can break without breaking the bank. The higher the speed it runs the better.