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fryguy · 01-14-2015, 01:14 PM

I just heard back from the maching shop in regards to having my NORS 21 stud heads milled. I had him cc the chambers prior to milling and he said they were about 81cc chambered heads. I told him I wanted to get down to about a 60-62cc chamber to get the compression about 8:1 He milled .08 off one head and .09 off the other to get me a 61cc chambered head. He told me he measured for thickness to make sure there was enough meat. He told me they had 300 thousandths thickness. Pretty thick castings

Fryguy

01-14-2015, 01:14 PM	#47
fryguy Member Join Date: Aug 2010 Location: Coventry, Pa Posts: 52	Re: Results of milling iron heads. I just heard back from the maching shop in regards to having my NORS 21 stud heads milled. I had him cc the chambers prior to milling and he said they were about 81cc chambered heads. I told him I wanted to get down to about a 60-62cc chamber to get the compression about 8:1 He milled .08 off one head and .09 off the other to get me a 61cc chambered head. He told me he measured for thickness to make sure there was enough meat. He told me they had 300 thousandths thickness. Pretty thick castings Fryguy Last edited by fryguy; 01-14-2015 at 01:19 PM.