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It really depends how loose your tolerances are. If you want something that will work you could do it with a hole saw or a drill bit in a hand drill and next would be your home drill press. Following into a precision mode which would be done in a mill setup or the top of the line CNC done.
You just have to define how precise you want the job or how much money you have to spend.
if this is for you to actually try to build your own housings (as opposed just being curious) then the cliff's notes from my experiences are:
1. get a VERY solid (preferably metal) template to use. it can be done with a good drill and a good hole saw, but if the template is no good, as Mono4lamar mentioned, you lose precision ... by the bucketfuls! actually, if you're interested, there is another tool that some of the smarter/more experienced guys had recommended, but the name escapes me at the moment. i will try to search for the thread and link it later.
2. put your runner ALL the way through to the chamber, then machine it.
3. Devcon Aluminum putty ...
1984 Rx-7 * 1987 Rx-7 * 2004 Rx-8
Originally Posted by j9fd3s
well its track only because to drive it on the street i need a smog, and that's not happening, i had visions, but i'm not sure it'll even pass in my imagination anymore.
Originally Posted by OZZYINCALI
plus if you ever hit a guardrail there would be no need for a coffin just weld some handles on the side and wallah (sp.). (voila!)
The same goes for when we stud the blocks as well. Multiple passes through the machine to insure they are as accurate as possible. You can actually slip the whole stack together over all the studs with no binding whatsoever and minimal clearance needed. Doing it the right way is the difference why some have issue with studding and some do not. Same could be said for other machining processes as well. I prefer to be over accurate when doing these steps than being accurate enough. I would treat your port project the same way though not as critical as getting the studs as close to perfect and parallel as possible.