What about the SOHC head? Put A14 pistons in the A12 then the big valve-head will fit using the datman1947 kit

Doesn't have the historical coolness of the AY, but makes good power

Yeah yeah I know :)

Just hoped that something magical had happend and a good head option for an a12 had come to life ;)

We don't know what happened. The project leader disappeared without posting status

A12 cross flow head raced in the Fuji speedway Victory 200 race in 1973. See AY for details

I have read everything...

What ended up happening?

Think this project died when it boiled down to $$$ vs reward. Around $20k for 1 motor. Even if you pumped out 50 units, your looking around $3500 for bare alloy (40% lighter) block and head. I'd guess 2k deposit and 6-9 mths wait. With a $170k out-lay. Just the head you'd be looking over $2k. I doubt many would stick up their hand !!

It´s been a long time since this information came out. Can you tell what follow? do you end the project tell somthing about it. you can reply directly to my mail sportfassis@sapo.pt
Regards
Roger

Hi guys, sorry for digging this old thread up, but I found this video of the red car with the actual x-flow head on and was wondering if someone had posted it one here before...

http://www.youtube.com/watch?v=A6Hue-1gCKk&feature=related

The water pipes don't seem to be connected though, so I'm not sure if it was running or not.

Definitely not easy but with CNC prototyping it has become a little more so.
Shame if the exercise is not successful, a shame for good intentions.

I was thinking of a chevy midget spring block with 2 litres capacity
using a shorter deck height for clearance and lighter weight.
Using a destroked chevy crank 61mm x 101.6mm stock bore.
Then any number of chev heads could be used.

Then this came along but the dodge version is around 4000usd for a block
so this one would be more.













http://www.circletrack.com/enginetech ... dget_engine/photo_07.html

Ah simple pushrods and cheap chevy parts
yet a chev v8 is 5 times cheaper.

As I understood it he was using rapid prototyping for a wax and was then getting them cast.
He may have been better off with a traditional pattern and coreboxes.The water passages are the main problem.
These surround the ports which of course are cores themselves. If the cores aren't correctly supported by the prints the wall thicknesses will vary.As posted a sandwich would have been an option for a one off to prove the design.
If it was easy every one would be knocking out stuff.
We shut down patternmaking at TAFE here in Syndey a few years back. There was a patternshop over south doing stuff for Toyota and Misha etc.
They had as many toolmakers as patternmakers all on mills chewing up muck no timber anymore.

Casting heads is not easy science, some companies have lost profits
with castings that have cracked and failed in the recent past.
One such company is suzuki with 16v heads, they had to prep them,
reweld, and treat them somewhere else to save the castings.

Billet ones would have been easier with todays cnc machines.
In large enough numbers they could have been affordable and
faster for 2 piece heads.
Then if any interest get more done.
Australian company in Aus dollars would have been worth it.
Also billet A series blocks using GA/QG heads and supra box
or t5 box would have been another alternative.
http://www.bulletcylinderheads.com.au/billetblocks.php