That’s weird. They were there a little bit ago.
Took them on a new Apple 11 and got a message that I didn’t have permission to post, so I sent them to my old 7 phone and was able to put them up. Will try again.
Found a number of voids in the casting that needed epoxy since the last post. Got back on it today and finished it as far as I can without the bottom end and head.
So far the port timing hasn’t been changed and probably won’t. The widths of the transfers have been slightly increased and the angles have been matched, the boost port has been added and the exhaust ports have been polished. Took a little material off the skirts of the sleeve to try and enhance the entry of the fuel mix into the transfers. Jury is still out on whether or not it’s going to cause them to brake.
The story of three wheels and a man...
Looks pretty symmetrical.
Red Rider's Sand Machine Updated 07/23/14
Okay.... So your not checking to see if your boyessen ports are symmetrical. You’re temporarily plugging them, so you can build up the casting around them, or for a smoother transition from cylinder to bottom end?
Red Rider's Sand Machine Updated 07/23/14
I was wondering if anyone would notice the silicone in the first photo.
So I’ve been looking at and reading up on the so called Boyesen ports and it seems that angling them downward a bit and putting a divider between them and the rear set of transfer ports aids the piston in drawing mix into the cases as well as better directing the mix up into the cylinder on the downstroke.
The wood dowels will be drilled out when the epoxy is cured so I can follow the angle and get a burr in there.
I’m also planning to trench the cases a bit so that the Boyesen ports really get a nice clear shot at the crank. Should also help lubricate and cool the lower rod bearing a little.
Or maybe it does nothing and grenades on its maiden voyage
I did, but it didn’t surprise me, as I’ve seen your engine builds before.
Interesting. I thought the diameter of the dowels looked a bit small to be plugging the ports completely. So the silicone is simply holding the dowels in place for the epoxy process? It’s good to you back at this project.
Let’s hope that isn’t the case.
Red Rider's Sand Machine Updated 07/23/14
Yes, just to keep the epoxy from oozing past the dowels. That stuff is a bear to remove.
BTW, ”Vato” Zone of Mexico stopped carrying the standard version of JB Weld
They only sell the specialty epoxies now, none of which I’d want to do this with. I need to find a source here to get this finished.