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| 90 degree V4 OHC |
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| saw:
Looking good :clap: |
| dbvandy:
I now have 3 of the 4 heads milled... Still need to mill the cam mounts, intake and exhaust ports and head bolt holes, but it is starting to look like something. I purchased a new drill press, a 12 inch Ryobi (on clearance at Home Depot for $100, I'm just sayin......) with a 3 inch stroke and laser "X" marks the spot. I got a really nice x-y table for Christmas but it was WAY to big for my tiny 8 inch delta press so I kept using the x-y vise on it. On the new press it fits great and works wonderfully. For those of you with proper mills, you might be chuckling, but it is what I have and it works just fine, just have to be careful and have realistic tolerances. It trammed in to almost 0 all the way around, so I can't complain. It has a MT2 and JT33 tapered arbor and I have red loctited the chuck on to it and blue loctited the arbor into the spindle as I might want to get it out one day. I have taken a ton of "heavy" cuts and it has not budged. If it comes loose, it comes loose, but I don't think it will... I put two scissor jacks under the table to tram it in, I am going to weld up some proper screw jacks that can be mounted semi-permanent. Here are some pics of the jig (scrap aluminum I had around). I have ordered a proper angle vise so I won't have to worry with this in the future, but this works just fine. And a wider shot: And the start of some documentation of the head (have yet to figure out ProgeCAD). The design was scientific eyeball and this is normalized to what it should be. I had fun trying to remember all that sin and cos stuff to calculate the angles and dimensions ... thank God for the internet... ok.. now go build it guys.... oh... still missing some dimensions.... working on that... More to come... Doug |
| dbvandy:
One head is done minus manifold and cam bracket mounting holes and head bolt holes. I am pretty confident I can make 3 more just like it... More to come... Doug |
| dbvandy:
Did not make any chips today... spent the day adding DRO's to the new machine. $9.99 digital 6'' calipers from Harbor Freight. Every time I am in there I pick up a set or two. Even if they crap out... its only 10 bucks to get a new one. x axis... I can move if needed. 6'' is not much, but should be fine for what I am going to mill... Y axis... what a pain this one was!!! The bracket needed to be pretty stout. The other two took about an hour each... this one... 3 or 4... but it is right. I do not really like it in the back, but I did not want it hanging out the front and get bent or broken. The Z is pretty solid. When I am in the mood I will make a proper clamp for the spindle, but this one works just fine for now. It repeats over and over and is solid. I can't complain. The Press has variable speed via a CV belt system and it has a tach to show the revs. The tach is a self contained system so I thought about getting a spare to add to the lathe... $200 worth of parts!!!! I only paid $100 for whole the press brand new on clearance!!!! Tomorrow I will get back to making chips.... that is all... Doug |
| dbvandy:
Well, the four heads are done. When I decided to go to 16 valves and 4 cam shafts the complexity skyrocketed immensely. The first one is within a few thousands of the other three where all the critical measurements were, so I decided to forgo spending another two days making a fifth one. After viewing Kenneth's Robot photos, I decided to step up my photography a bit. Not nearly the same thing as he is giving birth to, but here are the heads nonetheless... Now onto the cylinders and block. I am going to come back to the valves once I have a better handle on the placement of the cam shafts. more to come... Doug |
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