kpr's kp60

[kpr]

Got a bit more done on this head today.  roughed out the start of the ports.   figuring it out as go along. but the plan is,  take out most of it on the mill then hand port the rest.  

 

 

[kpr]

good thing i got the machine with the head that tilts both ways, come in handy already 

Have a jig in vice to  bolt the inserts into,  so can machine them all the way through.  makes it easier to get them all the same also 

Pretty close to size here

Need  to do some more math  double  check they are sized correctly.   But pretty close on the inlet side also.     

Probably said in a previous post;  Bigport heads, all the ports are on an angle.  so my evenly space ports dont line up, even this far down.   Most of it will come out once port whats left of them.  but will likely end up with a few step downs here and there.  Since the main goal is a test run for my smallport head. not interested in making angle ports.  and if this head were to ever get big valves, enough will come out for seamless transition 

Angle makes the port entry look way bigger than it is 

 

 

 

[kpr]

Needed to figure out the manifold, before gluing  in the port inserts in for good.

Had a bit of acetal  hanging around that i brought for another project many years ago.  current adapter/ manifold is made of the same stuff. 
Makes for good thermal insulator  

 

bunch of excess material to come off and ports to be machined to size.  but all bolts up