Mazda has deleted all 12A parts, so Kim's way will be the only way to rebuild 12A's very soon... Once all new 12A housing are gone (won't take long, once everybody realises they're no longer made!), usefull used ones will get sought after too.
Turning 13B housings into 12A ones isn't new, but it seems a serieus job. Good luck anyway

 

http://ausrotary.com/viewtopic.php?t...73e4d3dbd6ddb9

 

teaser pics of my 12a stock pile..all new hehe

 

Ehh whats up with the first three housings ?, i've seen them before, just never knew what they were.

More or less port area?

 

I have to talk to my friend the machinist tomorrow. I am also in need for a couple of 12a housings and have 2 spare 13b housings in good shape.

 

Dude, you are my kind of crazy. That's forkin' awesome.

Frankenmotor to the extreme!!

Jon

 

Yeah, what is up with those 3? it looks like teh first is way bigger than the rest...

 

early style housings....rx2 business

 

Suscribed.

 

Crap. Looks like I'm gonna have to buy up all the 12A's I see.

 

Or befriend someone who owns a machine shop.

 

Sad thing is I used to work at a shop that had a similar Bridgeport CNC mill...

 

Am I the only one who finds it hilarious that it's called a "bridgeport mill" ?

I'd be willing to bet that despite the name it's amazingly hard to do good bridge porting on it, lol.

Jon

 

I dunno, besides the backcutting, I would say it's probably doable.

Hell ****, if not then the spark erosion machine definately could do it

 

Bridgeport is a great brand. I use several peices of their equipment in our machine lab at school.

Actually, cutting your inital bridgeport would be relativly easy on it. Its a simple mill, which is just a rotary bit that is stationary, with a moving table under it. (moves in x,y and z directions) So, it would be very easy to cut the main bridge very cleanly, and even open up your runners a bit. You will definatly have to do alot of hand finish work though. I ran a honda head though one of the CNC mills and it opened everything up perfectly, but then there was alot of burrs to remove and smoothing to be done.

 

Bumpity bump :-)

Slow day at work today, so why not put it to good use.

Made a Port Scribing Tool out of an old chewed up rotor, nice and handy. :8


And a Seal Box for when building motors.

Yeah I put my name on everything

I love my job.


Sorry, no update on the ground down rotorhousings use in the 12A turbo and prolly won't be for awhile, I got some masonywork to do before the frost kicks in

 

Good work! Nice Job!

 

jesus ... i need YOUR job.

 

Back from the shop
Began my build up today.
Will make other thread when its all done

A few teaser pics for now

 

The other cool thing about it is that you can use the process to use otherwise-junk 13B housings. If you get a set with some decent flaking, you can get it cheap and out-of-spec, machine it down, and go.

 

BTW you can build a 13b 4 port using 12a irons and gsl-se 13b housings. You will just have to custome make an intake manifold unless you are building a p-port.

Also, great job on the engine build using todays technology. I think that is one of many dreams for us to have a CNC machine- endless possibilities....

 

Looks really good. I wanna see this thing fire up!

 

Love the trailerpark boys bump. Can I steal it?

 

Sure, I did.

 

Those are not SE housings.
Patna?