I have a mess of heads floating around, and a big old mill. I want to start with a 2v conversion, then work my way up to milling off the log (leaving the exhaust), boring the intake nubs, and pressing in new intake runners like the South Americans. I’m also super ignorant, though I have a buddy who was a machinist.
Before I bug him, I thought I’d check and see if anyone had advice as to which end mill to use? I’m leaning toward carbide just from random research, but I don’t know what kind of cast iron our heads are:
Gray cast iron (GCI)
Nodular cast iron (NCI)
Malleable cast iron (MCI)
Compacted graphite iron (CGI)
Austempered ductile iron (ADI)
Reading https://www.sandvik.coromant.com/en-us/ ... rials.aspx they mention CGI as common in engine blocks and heads. They suggest dry cutting, carbide with thick coatings. I have a pic I’ll try to post, with along straight shank end mill.
Before I bug him, I thought I’d check and see if anyone had advice as to which end mill to use? I’m leaning toward carbide just from random research, but I don’t know what kind of cast iron our heads are:
Gray cast iron (GCI)
Nodular cast iron (NCI)
Malleable cast iron (MCI)
Compacted graphite iron (CGI)
Austempered ductile iron (ADI)
Reading https://www.sandvik.coromant.com/en-us/ ... rials.aspx they mention CGI as common in engine blocks and heads. They suggest dry cutting, carbide with thick coatings. I have a pic I’ll try to post, with along straight shank end mill.