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  1. #1

    custom machining a 4 rotor rx7

    One of the best build threads I've ever seen. Solidworks drawings, animations, video... Lots of tech.
    http://www.rx7club.com/showthread.php?t=974831

    -Andy
    PS3, Xbox 360, & Steam tag: Cryptic78

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  2. #2
    Senior Member..now yer posting!
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    I'm on RX-7 club and subscribed to that thread. Awesome stuff!
    2008 Saab 9-7x Aero
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  3. #3
    Ol' School awsomeears's Avatar
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    I don't even know what Half that shit is on the engine but that guy has determination.....
    HVAC...
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    House music...

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    - More naked bitches

  4. #4
    A regular know-it-all Tetris Champion Snake Champion Lasagna From Heaven Champion Mac Man Champion Mahjong. Champion Mini Putt 3 Champion Plastic Saucer Champion Ratman Ralph Champion Prince Valiant's Avatar
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    cool stuff....
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  5. #5
    Race Transmission Rebuilder twicks69's Avatar
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    That is a pretty damn badass buildup of a custom 26B (for lack of a better term) and I love the custom peripheral intake/exhaust port plugs he made. Definitely a better way than welding/porting/devcon like everyone else does.

    I will need to watch this one closely! Great work on the eccentric shaft also!

    Mother Of God is right!!!!

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    Tim Zimmer
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  6. #6
    Post whore PonyKiller87's Avatar
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    Cool looking build. Is that engine normaly only 2 sections where this guy is making it 4?
    Kevin
    Daily Driver: 1999 Chevy Tahoe w/ Vortec 350
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  7. #7
    Quote Originally Posted by PonyKiller87 View Post
    Cool looking build. Is that engine normaly only 2 sections where this guy is making it 4?
    yes...
    the 13B-REW is a twin-turbo with 2 rotors (3rd gen RX7's 93'-02')
    the 12A was a 2 rotors NA (1st gen RX7)
    the 20B was a 3 rotor (aviation, Mazda cosmo, and I think a Mazda truck had one)

    a rotor =
    -Andy
    PS3, Xbox 360, & Steam tag: Cryptic78

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  8. #8
    R.I.P. BCM Jawashoot Champion Toby and Kiki Champion GTSLOW's Avatar
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    So that's where the infamous apex seals go.
    All posts from the above author are expected to be 100% BS. Thank you and have a nice day.

  9. #9
    Senior Member..now yer posting!
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    Quote Originally Posted by Cryptic View Post
    yes...
    the 13B-REW is a twin-turbo with 2 rotors (3rd gen RX7's 93'-02')
    the 12A was a 2 rotors NA (1st gen RX7)
    the 20B was a 3 rotor (aviation, Mazda cosmo, and I think a Mazda truck had one)
    Not sure why you picked those 3 engine codes to define things...but the 20B only came in the cosmo.
    2008 Saab 9-7x Aero
    1986 Mazda RX-7 13B Turbo
    2002 Saturn SC2 - Clean, low, slow daily
    2000 Saturn SC1 - RWD project, broken
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  10. #10
    Post whore PonyKiller87's Avatar
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    ehh, either way it will be interesting to see when its done.

    My only question is if your going to spend that much time, effort and money why not do a 6 or 8 rotor, in reading that thread it sounds like others have done 4 rotors before.
    Kevin
    Daily Driver: 1999 Chevy Tahoe w/ Vortec 350
    Wifes DD: 2003 VW Passat Wagon w/ 1.8T, 5 speed auto
    Plow Truck: 99 Chevy K3500 Pickup w/ a Vortec 454
    Toy 1: 98 BMW R1100R
    87 Camaro Iroc Z28, SOLD, Gone But not Forgotten

  11. #11
    Quote Originally Posted by The Shaolin View Post
    Not sure why you picked those 3 engine codes to define things...but the 20B only came in the cosmo.
    Does it really confuse you?
    -Andy
    PS3, Xbox 360, & Steam tag: Cryptic78

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  12. #12
    Senior Member..now yer posting! bikedad's Avatar
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    I've been following that build for some time. Amazing amount of skill!

  13. #13
    its almost that time again Ricky Bobby's Avatar
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    that is absolutely crazy i just looked at the pics cause I cant follow the rest of the stuff

  14. #14
    Formerly known as Yellow Wagon jbiscuit's Avatar
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    way over my head
    - - - - - - - - - - - - - - - - - - -
    2012 Subaru WRX STi 5-door
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  15. #15
    A shame such awesome talent, innovation and skill is wasted on a Wankel

  16. #16
    Senior Member..now yer posting!
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    Quote Originally Posted by Cryptic View Post
    Does it really confuse you?
    Of course not. You just missed that the 20B was also twin turbo, and a whole slew of 13b's that most people would have used instead of jumping right to the REW. lol.

    For anyone else that's still wondering about the engine codes, the number=displacement. 13B - 1.3L.
    2008 Saab 9-7x Aero
    1986 Mazda RX-7 13B Turbo
    2002 Saturn SC2 - Clean, low, slow daily
    2000 Saturn SC1 - RWD project, broken
    1996 Suzuki Bandit 600
    1997 Golf GTI mid engine vr6

  17. #17
    I want his brain. Now that's an engineer. Wow.
    2009 Harley Nightster.
    One day we will have muscle cars again....
    -Jimmy E.

  18. #18
    That's what the number before the B means?!


    Quote Originally Posted by SSDude View Post
    A shame such awesome talent, innovation and skill is wasted on a Wankel
    LOL

  19. #19
    The Yellow Tie Fighter
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    Yea there are some smart cookies out there for sure!

    Impressive to say the least. The real test will be to see how it holds up in the long term. You would be amazed at everything the OEM considers when designing an engine.

  20. #20
    Quote Originally Posted by Taetsch Z-24 View Post
    That's what the number before the B means?!
    LOL
    It refers to the engine size.
    10A = 1.0L
    12A = 1.2L (actually was a 1.1L, 1146cc)
    13B = 1.3L
    20B = 2.0L

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