Nothing new about CNC machines heads, Dyno Dave Bennett has been at it for years and made millions.
http://www.ausmanufacturers.com.au/yellaterra/

A mate of mine in NSW will have full CNC ported A series heads available soon.

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Have a Nice Day.
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Hi Kirby
I'v been using a flow bench for a long time and i get good results if some one can show me a better chamber i would be very grateful i am always willing to learn.
Graham Russell

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"It's better to be not informed than ill-informed"

Mr 850man?
I did'nt say there was any thing new about CNC heads, but it's funny how i put a post up here about the chambers an all of a sudden some one has been doing it for years and my mates doing this and my uncle been doing that but i have not seen any of these things that every bodies doing,i just put a post up saying that i can now do it and here is a sample, no different to rods and cranks people have been making them for years but now i have my own design and having them made in australia and proud of it rather than buying it from over seas. would YOU like to buy a crank and rods may be i can do you a cylinder head as well.
Graham Russell

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"It's better to be not informed than ill-informed"

Hi Graham
Its nice to see new technology being used for old school stuff.

Can you vari the chamber volume to a set cc say 21.4cc

Well done
Kiwiinwgtn

HI KiWIINWGTN
Most chambers are bigger than 21.4 these days because of the valves being down further in the head but when the chambers are machined either by hand or machine you just deck the face to get the capacity you want.
GRaham Russell

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"It's better to be not informed than ill-informed"

soon u will be able to 3d print your own head

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A good friend will come and bail you out of jail...but a true friend will be sitting next to you saying "Damn...that was fun!"

Can already! Monash uni has a laser sintering machine that can do 600x400x500mm prints in aluminium, titanium and other materials. I believe there is another machine from a different manufacturer in aus too.

The machines are destined for research into aircraft parts and medical implants but I'd love to do a weekend foreigner!

You would still need to machine to achieve surface finish but that's all.

https://platforms.monash.edu/mcam/index ... Itemid=195

M

Nice head Graham, looks good I'd love to get my hands on one of the 5 axis machines they sell in the states specifically for cylinder head porting. The guy you've got doing the programing, do you know if he/she is using Mastercam? It's a pretty common CAM package in industry, and it was designed with head porting in mind, a lot of the preset toolpaths are apparently written for jobs like head porting. I don't think you can use it for gas flow simulation like Kirby is suggesting, some of the other CAD engineering packages that are designed for Injection Moulding have flow simulation in them for designing Runners, Gates and water jackets, you could likely do it on one of those.

Of course, the bad thing about porting one of these heads on a Cnc, is casting consistency and the fact that a lot of them have had water in them for the last 30 years rusting out the water jackets and reducing port wall thickness. When you're porting a head by hand, the second you break through into a water jacket you see and and can stop to weld it up. If you do it in Cnc and it breaks through, you won't know till the end of the program, by which stage all you might be left with is a big grey paper weight and an angry client.

Sure would be nice to have a spare $500k

http://www.youtube.com/watch?v=PWJAeEzqdc4



I've worked on some of the current ones that use acrylic etc. They're good, they're certainly useful for prototyping, but they are EXTREEEEEEMEEELY slow. I wouldn't try and use one for production or to replace production CNC machining. They're great when you have to model something up to show a client or poke with your fingers. Like you said, surface finish is a big issue, and by the time you print something and then finish machine it, or polish it or whatever, it would be quicker to machine one up out of a soild block.
Still, it's great having an extra tool at your fingertips

Man! that's scary!

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"Show me the Mini!"

Hi Alex
Thanks, the chambers turned out really and the finish is really good for castiron no need to polish we do not use any porting programe we just show him what we want he just measures it up be it heads,rods or any other parts dials it in and magic happens.
Not sure if he is using master cam or not most people do i don't mind what he uses so long as i get what i want i'm happy but he is a very very good programer.
Graham Russell

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"It's better to be not informed than ill-informed"

I've had some stuff printed in stainless before and it works quite well, however I'd be hesitant to use it for a cylinder head, only because there can be issues with porosity and a thick cross section like that would likely cause issues. I think 6 axis CNC would be the way to go.

http://youtu.be/RnIvhlKT7SY

CNC is all good for the outside but unless it is a drag car it needs a water jacket.

M