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How are you loading 20 photos per post? I can only load 10. - Terrt

In my builds I try to thoroughly test and fit each part as it's machined so final assembly can be assembly and not turn into a lot re-work. One 'file-to-fit' part left for final assembly was a two inch diameter bronze thrust washer whose purpose is to prevent ring gear wobble during starting. In...

Ross, I was hoping Ed would reply as he was the author, but he may not visit this forum any longer. I'll try my best to answer your questions, but again I never built the model. I think the design is scalable upward, but Ed did machine some of the major parts on a Tormach. Ed never used (or even...

It's my own design. - Terry

I've never been a fan of mounting IC engines over wood boxes, but they're handy for hiding nuisances like big ignition coils. I typically use steel plates for display bases which are heavy and keep all the running accessories out in full view. A 12" x 18" steel baseplate was prepared from some...

Brilliant! I'm envious. - Terry

Coolant from the water pump enters the block through a pair of passages in the front of the engine and feeds the water jackets surrounding each bank of cylinders. These passages were bored for close sliding fits around a pair of thin-wall aluminum tubes that will position the timing cover and...

Before installing the oil pan, a graduated beaker of water was used to measure the volume of the sump at two arbitrary fill heights. These levels were added to a cross-sectional drawing of the engine to record their distances below the rod caps and crank cheeks. This diagram will be used later...

I managed to get twice as many rings than needed from the first blank, and so work was stopped on the second lot. With nearly all the engine parts now finished and playing hide 'N seek in my shop, I started rounding them up for final assembly. The first step in assembly was to install the rings...

Sparky, The parts that don't get painted are left as is - no clear coat. I've found the surface tends to be more resistant to stains if after bead blasting it is immediately cleaned with Simple Green followed by a bath in warm water with dish detergent. Dry immediately to prevent water stains...

Sparky, The 7:00 o'clock thing may be a coincidence due to a too small sample size. I checked another dozen rings and can't say I saw a pattern. I tried the paper trick when I first started making rings. I was getting some yellowish brown deposits when it occurred to me the brown paper I was...

Peter, It's just a cheap USB microscope for a computer...

The final step in my ring-making process is to light test the rings. A shop tool made up of a 2000 lumen flashlight, a spare cylinder liner, and some turned bits of Delrin were used to sort the rings into subjective A, B, and C fit categories. One of the Delrin pieces is a dummy piston with a...

I needed a break from lapping and started work on the normalization fixture before the second lot of rings was finished. The components of the fixture were machined from some 1144 left over from the crankshaft, and the critical dimensions were taken from the worksheet in a previous post. The...

Peter, When I cut ring grooves, I use a sharp insert with back clearance, and I practice on the end of a piece of scrap to get the feed and speed for the best surface finish. The insert also needs to be perfectly perpendicular to the axis of the piston. If the measured width of the groove...

Piston Rings: Blank Preparation . . . I've run out of excuses to start working on the piston rings, and so they're now underway. I'm anal about precision when it comes to piston rings, and for me their machining has typically been an exercise in frustration and patience. Asymmetrical stresses...

I think it would fine from a single 12V lead acid battery using the proper heavy gage wiring. I'm talking about one of those little 9 amp-hour batteries commonly used in UPS's. You can hold them in one hand and will deliver up to 40 amps for a short time if your starter wiring is heavy enough...

I'm surprised your motor with the 3:1 belt reduction didn't make enough torque to turn the engine over especially at 24 volts where you should have seen 30 kg-cm at the crankshaft. Are you sure the limitation wasn't your battery or the gage of the wiring or the contact resistance of the relay...

As mentioned earlier, I wanted to make a new starter solenoid because the one designed around a 40 amp automotive relay wound up much too big. A new one was designed around a power MOSFET whose heatsink set a lower limit of the solenoid's size. In this simple switching application for a MOSFET...

Looks fantastic and sounds great. You really work fast. - Terry