Elwood,
Just had the block machined with the torque plate (FINALLY getting moving on the project!!!!). I'm going to bring your results to the machine shop tomorrow and see if what they saw parallels your results. If I understood Jeff (the machinist) correctly the plate's largest effect was seen 90deg to the pin and removing the plate caused the bores to close up slightly.
I now have a very nicely machined -.020" crank and a block that's getting close to being ready to assemble .
Andy, good to hear that things are moving on the engine project again.
Looking forward to seeing the measurements on your block.
My engine is still not assembled, unfortunately. Last thing I was doing was cc matching the cylinder head chambers, but I've been busy with other work in the shop, including a major tear down and repair on my horizontal milling machine.
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
I was able to have the guys mill .015" off the deck of the block to try and bump the CR up. They said the the deck was actually pretty flat, even though I had heights of #1 and #4 pistons that varied by .010" (before complete disassembly).
The crew at the machine shop were impressed by the torque plate and the packaging !
Good luck with your milling machine project. I've found that my latest project (Henry ) effectively stalled everything else! I need to get him wrenching ASAP to make up for lost time!
The head I've been working on most recently is a Plymouth 218, casting 1326304. The as-cast volumes range from 76.2cc to 78.6cc (the TDC hole in cylinder No. 6 was plugged flush with the chamber roof), about a 3% variance, so not too bad.
The torque plate was a quickie job, so the finish on the sides and top was rather crude, but it works.
The milling machine (this is the one I posted a couple of years ago, machining the torque plate) is coming back together, but it's been a lot of work so far. Had to make a number of replacement parts, since this machine dates from 1966 and factory parts support is basically non-existent. One of its previous owners had used a water-based coolant (this machine was designed in the day of oil-based coolants and cutting fluids), which really gummed up and rusted the internal mechanisms in the saddle and universal housing.
20241014_164317.jpeg (94.39 KiB) Viewed 3718 times
“When a long train of abuses and usurpations, pursuing invariably the same Object evinces a design to reduce them under absolute Despotism, IT IS THEIR RIGHT, IT IS THEIR DUTY, TO THROW OFF SUCH GOVERNMENT...” -Declaration of Independence, 1776
Home 
.
) effectively stalled everything else! I need to get him wrenching ASAP to make up for lost time!