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*bump* time. Here's some photos of one of the heads, the file was kindly provided to me by matt-jaysey. (send me your address, I'll post this to you) And just out of interest, a compressor wheel. For some reason I just can't get a good photo of the objects I print, in person they look a heck...

Gidday from the Gold Coast.

Very nice! For something that small would a Tesla Turbine be more efficient?

An UP! www.pp3dp.com

I made an owl yesterday, as a birthday present for a friend. Also in the photo is a small Subaru WRX cylinder head, designed by one of the fellows here. He kindly gave me the file to make it, if I make one for him. I haven't got a good photo of it yet but once I do I'll post it in his thread...

Let us know how that goes - I've got an UP! 3D printer and it does some pretty nice prints.

A friend of mine has also invented a 6-stroke engine and it works very well. He's having legal problems with a guy that tried to ..... well best not said until the case is completely over. http://www.sixstroke.com He used to live a few streets from me and I've seen the bike in this video -...

Hey Matt, if you're interested I could make most of those parts with my 3D printer. I've read that the ABS plastic is uses just burns away without any residue when used in sand casting, so it might be a good thing for you. It'll print objects up to about 130 mm cubed. And my usual car is a 2.5...

Mine seems to be pretty good so far. I've printed out some new parts for it to see how they go - mechanically it's been fine over the last year.

I've also got a 3D printer and have used it for all sorts of things. I thought some people here might be interested in it because it uses ABS plastic and so you can print an object with it, then use that object to make a mould. When you pour the molten metal in, the ABS just burns away with no...

I'm an engine guy, not an electronics guy. ;) The igniter amplifies the signal from the ECU to the coil to make a bigger spark. I'm not sure how to tell if any individual COP has one other than to check the specifications on them. I know the wiring for them is a lot more simple if they do have...

Not all of them, but a fair few for sure. For example the LS series of Chevy V8's still uses separate coils with short leads to each plug. You also have to check to see if the COP unit has the igniter built into it or it's a separate unit as the wiring is quite different for both types.

Ah okay. I'm mostly familiar with the Bishop Rotary Valve setup and it too only has a tiny chamber.

Do you have any photos of the combustion chamber? I've always been interested in rotary valve heads.

Mine, at about six tonnes, is such a delicate little thing. :) It's got a magnetic XY sensor system on it though, so I can put the cutting tool back to within 0.001" quite accurately.

Fascinating to watch the steam enter the cylinder then drip out slowly.

Thanks, will do.

I'm not planning on building anything, just curious.

Just out of curiosity. Things like swash-plate pumps and so on.

Thanks! The new car will be faster ... I just have to finish it. I did some more work on the exhaust today and will do some more tomorrow. All going well the four pipes will be stitched together and in the right place, so I'll be able to weld them together properly soon. Then weld them onto the...