Quote:
Originally Posted by Bored&Stroked
Boy, you need a medium sized CNC mill - would make the machining so much more accurate and consistent. Also, you could easily touch-up the chambers, get all the stud holes in exactly the right places, etc..
It looks like these first ones are quality castings - you'll soon find out as the machining process starts!
Best of luck!
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Hi bored & stroked, thanks for your advice, I have been a Toolmaker for over 35 years & the last 15 years working for a medical device company making highly precise tooling. With a good machine & a digital readout you can get just as accurate positional accuracy with a manual machine as a CNC, I would like to add a CNC to my home workshop but unfortunately good used ones are hard to find over here & a new one of a suitable size for the job start at about $70K, I would have to sell a whole lot of heads to pay for that, we have been making the heads for about 20 years, one thing I do find that castings can be a little inconsistent as is the nature of casting & using a manual mill I can adjust the datum on each casting in relation to the jig so the bolt pattern is perfectly centered to the cast bosses & also the spark plugs are centered to the recesses, on a CNC that is not the case as we had used a CNC for a batch a few years ago & you do see a little variation, most people wouldn`t notice but thats the Toolmaker in me working to perfection as Toolmakers tend to do, thanks John