has anyone tried milling head down for more compression? howabout openining up exhaust port for more flow

 

I just took apart a lakota last night. I was looking at the head thinking about milling, but it looks like it been milled to the max already. Any more and I'll be cutting into the valves. So, my guess is "no, not likely to get more compression from milling the head". But you can deck the piston I bet!

The exhaust port.... You might do a little work there. But I wouldn't get carried away... Do some research on porting before diggin out lots of aluminum. I usually try to imagine a column of air moving thru the port and try to adjust the port so that column neither gets wider or narrower.

 

If your looking to up compression I would go with a domed racing piston. The ex port is too rest. on that machine. I ported mine and did most of the work directly under the valve ala bowl hog cutter or some version of such.

 

Here is a great porting guide http://www.reincarnation-autom...ting_guide_page2.html


Its for the 460 ford, and its how I ported my 460,,, you wont go wrong following that guide.

 

Since you guys are looking at increasing ex. flow is anbody interested in a slightly used DG RCM ex system for your Lakota? BTW Randy nice link. That's similar to what I ended up doing to my lakota head but with a little less work around the valve guide and just a slight blend to match the new pipe.