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Milling 13b housings down to 12a is common in Australia. Its a simple job with a cnc machine.
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I'm currently using Series 5 13BT housings (turboII?) for my 12a. They are away getting machined down to 12A width. Not really common (although becoming more popular), but easily done. Mind you I'm also using the 13BT end housings so no water seal groove is advantageous for me.
Just do it and have the tooling path allow cutting through the chrome first then into the housing so you dont unpeal the chrome liner. If I had the gear I'd have done it myself. Chris. |
Originally Posted by Kim' post='879278' date='Aug 2 2007, 01:50 AM
Yes it will https://www.nopistons.com/forums/pub...IR#>/wacko.gif
Removing 5mm on each side ofcourse, not 10 on one side. Haha everybody thought about this, but I was the only one desperate enough to ask the question https://www.nopistons.com/forums/pub...#>/biggrin.gif Guess Ill give it a try. If you don't mind modifying an intake you could use all 13B irons with the grooves in them. Then no grooving of the housings would be required. Lynn E. Hanover |
Originally Posted by Lynn E. Hanover' post='879502' date='Aug 5 2007, 05:46 PM
If you don't mind modifying an intake you could use all 13B irons with the grooves in them. Then no grooving of the housings would be required.
Lynn E. Hanover I love modifying stuff, "unfortunately" I allready have done the grooving before, so the CNC program could be used again, just needs modifinationcating to do the oil/dowel o-ring. Thanks anyway, mentor https://www.nopistons.com/forums/pub...#>/biggrin.gif |
Originally Posted by Jeff20B' post='879324' date='Aug 2 2007, 10:30 AM
Earlier this year I was selling an engine with 12A turbo rotor housings. Too bad. They only had 10k miles on a rebuild done in '03. The new onwer is a new member of the RX-7 club forum.
You can't get 12A turbo rotor housings anymore unless you buy them from MAXT. https://www.nopistons.com/forums/pub...IR#>/smile.gif |
That's good to know. https://www.nopistons.com/forums/pub...IR#>/smile.gif
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https://www.nopistons.com/forums/pub...1047683771.gif
So I did it. It's possible. FYI Rotorhousings are pretty hard on the millcutter bits, sure as hell not just regular aluminimums https://www.nopistons.com/forums/pub...IR#>/smile.gif http://www.rx7club.com/showthread.php?t=696169 http://i23.tinypic.com/22f39z.jpg http://i21.tinypic.com/11llkar.jpg http://i24.tinypic.com/57k9j.jpg |
Wow, that is one shiny housing.
I would guess the exhaust port sizes are different from 12A to 13B so will you be gaining much from the bigger ports on the 13B housings? |
Nice job on the CNC!
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you know what i was think would be cool. if you could do the grove on the rotor housing keep the one on the plate and instead of using silicone and teflon water seal using some sort of copper ring as the seal. so that you would never have a blown water seal again .think how good it would be...
what you guys think |
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