So one of the things I’ve been researching are the many modifications that can be made to a Type 1 engine case’s internals.
Now most of these arose out of experimentation in on the performance racing front, and of course, some of them would really not make any difference in a stockish engine, but I’m thinking of at least attempting a few of them to see if I can successfully do them with the basic tools I have available to me.
Some of them can’t hurt and can only improve oil flow and case pressure. Since I’m sticking with a 69mm stock crankshaft, there’s no point in doing some of the them. However, understanding what is happening by implementing them is desirable to understanding the inherent weak points of the Type 1 design.
Now one of the most useful sources of information is documented at Bob Hoover’s Blog. Though he passed away almost 9 years ago, his posts are some of the most informative that I’ve seen and that content needs to be saved for posterity. (Who knows how long Blogspot will keep dormant content around.)
Some very solid basic information that anyone who decides to go full-on air-cooled Type 1 engine building should peruse the many pages there.
Some of the best basic pages include:
- Crankcase Basics
- Crankcase Basics – II
- HVX Mods – For improved internal case lubrication
- Chemicals – Materials for assembly
And there are many other great posts, some about aviation-related things, and others about random stuff.
As I mention, some of the mods shown at this site have racing and high RPM engines in mind, but I just don’t see some of them being a negative in a stock engine in any way.
The basic directions I’m following for the oil gallery work, as well as the full flow oil filtering case modifications are coming from Eric Huelsmann’s Bugman page. There’s quite a lot of commentary and instruction that I’ve found useful to incorporate into my own plans. Unfortunately, the site is almost impossible to navigate as I’ve found no archive page or other directory to posted content.
There are Previous and Next links at the bottom of the page and that’s unfortunately how I get around the site.