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Understood, but that still doesn't stand a chance holding me back from doing it. I have some machining experience. I'm keeping the design going with machinability in mind. I believe I can make every one of these cuts.

Sorry I haven't posted anything in a while. I've been busy. I've changed to a 1.5" bore. I've been slowly working on the cylinder head. Here is what I have so far. Don't mind the squareness or thickness. I've got quite a bit of work before it is done. These are just screenshots, not...

4 valves would be interesting, but I'm afraid the valves would just be too small at that point. I haven't been using Inventor for very long. About a year. I used Solidworks for a little bit before that. This project is helping me learn Inventor as well as other skills. I have not run any...

Here is a updated rendering of the cylinder using the new dimensions.

Good to know. Thank You! This is GREAT info. I will definitely be using this later. Thm: Even more excellent information/assurance.

Thanks for the links. I found a place that I can source copper sheet from below 0.01" to 0.05" and more if I need to alter the compression ration. Using spark ignition, I could have a iginition table for straight methanol and build some others based off of tuning done beforehand. Like you...

I'll be using spark ignition. After studying quench and squish, I'm going to redesign the piston and I have an idea for the combustion chamber shape for the head. Something like a wedge design. Either that or create a greater dish in the piston and minimize the deck height (quench distance of...

Here is some info: (All measurements are in inches) Enter Cylinder Bore Size: 1 Enter Piston Stroke Length: 1 Enter Head Gasket Bore Diameter: 1.004 Enter Compressed Head Gasket Thickness: .01 Enter Combustion Chamber Volume In CCs: 0 Enter Piston Dome Volume In CCs Negative...

Annealing copper is no problem. I've worked with copper before. Work-hardening metals are a pain to work with. I was actually thinking about annealing the copper just the other day. You've confirmed it. Thm: I'll shrink the sizes of the sleeve and cylinder a bit. I'm still wanting to...

I would alter the compression a little if I know for SURE I'm going to supercharge it, but it would still be pretty high. This engine will run off of 99.9% pure methanol (maybe nitromethane added in later) which has an octane rating around 115 if I recall correctly. Plus, methanol has the...

Me being a newb to most of this; how are you machining the water jacket?

An update. I've been working on the cylinder. The pictures below are of the assembled set, obviously. The iron sleeve is approximately 1/8" thick. The 'bulk' of the aluminum running the length of the cylinder stays a minimum of 1/8" thick as well. I've been debating on whether the cylinder...

Like so? 3 on each side. Should they be farther apart? A hole is then drilled through the underside of the piston until I hit the oil passageways. Is this the correct method? Oil scraped from the cylinder wall flows through the oil passageways into the center hole 'in' the piston so the oil...

So, would it be possible to use the second ring as a dual-use friction and oil control ring? I was thinking about doing something exactly as you described, but wasn't sure.

Update: 0.04" ring gap. Distance from crown to wrist pin hole midpoint is 0.735". Piston is a total of 1.088" long. Still debating the oil control ring. How does one make one?

I forgot to answer your other question; I'm using Inventor Pro 2013.

I wonder the same thing. Maybe I'll just build a 2-cylinder with such pistons and see? :hDe: I'm planning on spark ignition using a custom solid state system, including spark advance.

I see what you mean. Like I said, I was just trying to model off of a typical performance piston from JE, Weisco, etc. If midpoint is preferrable for small scale engines, I'm more than happy to change the design. I do want this to work after all! :cool: Attached is an example of what I'm...

I was wondering about that. I believe I have the grooves set for a 1/16" (.063in) thick ring. I wasn't sure if I could safely go thinner. Keep in mind that this will be a high compression, supercharged engine. I forgot to mention a few things: rings - fine grained cast iron (Durabar 6000...

It will be a semi-high compression setup that will eventually get supercharged. I'm controlling the compression and piston-to-deck travel with the dish in the piston, just like how they do it on the full-size boosted conterparts. The wrist pin could possibly use a little more meat on the...