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Thread: Building the BMW 313rx, or I want a faster Lemons car

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  1. #1 Default Building the BMW 313rx, or I want a faster Lemons car 
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    I need a second lemons car (need may not be the right word), and after 3 years with the daytona I want something a bit more fun. But at the same time I don't want something normal. So engine swap it is. I've always liked rotaries and I really fell in love with them last december when I got to drive someone's RX7 lemons car. Being able to rev into oblivion is just awesome. They don't make a ton of power, but they make enough to be fast. Even the NA cars are put in A-Class.

    So, engine decided on. But the car itself still need to be light and handle well. So screw it, lets get a cheater car. BMW 3 series it is. More than likely it will be an E36 to avoid the E30 tax. It's heavier but the stock E36 suspension is better, and there is no way I get through inspection with aftermarket suspension. So rotary powered BMW, what could go wrong?

    Yesterday I bough a 1988 RX7 convertible. The owner was parting it out so when I got to him the hood, seats, bumpers, and wheels were gone. Who cares, I just need the drive train and associated parts to make it run.





    Racecar sticker for the win


    Basketcase interior and a decent steeringwheel


    That shift boot. Oh, and that switch controls the wipers.


    That 80's radio/HVAC
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
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    you are definitely one seriously dedicated, possibly certifiable individual
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  2. #2 Default  
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    So I did some digging in the car. I replaced the spark plugs and found that rotor #2 had the plugs in reversed (each rotor has two plugs, and they are different). Both rotors have low compression which means I get the pleasure of rebuilding the engine. Which I wanted to do anyway, so that's fine. The exhaust is hilarious. The pipe is disconnected from the cat, so it's essentially just an open header. Open header rotaries are stupid loud.

    I'm probably going to ignore the car for a couple weeks so I can get the daytona back together and ready for NJ. Well that's my intent. I'm sure I'll keep poking at it anyway.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
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  3. #3 Default  
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    Sounds like a really cool project. If you ever need a spare set of hands I'd love to help out. What are your plans for mounting the 13b in the BMW? I can't image the engine mounts are remotely similar.
    '84 Carrera
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  4. #4 Default  
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    Quote Originally Posted by Don Juan View Post
    Sounds like a really cool project. If you ever need a spare set of hands I'd love to help out. What are your plans for mounting the 13b in the BMW? I can't image the engine mounts are remotely similar.
    I will study how it all mounts in the RX7, and then I'll study how the BMW mounts everything, and then there will be a lot of custom fab. That's honestly how much I've thought about it. I won't be finding the BMW shell until June at the earliest, so I've got time before I need to figure it out.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
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  5. #5 Default  
    Subscribed to this thread! I don't know you what got yourself into but it sure looks like fun (and a lot of work).
    1999 C43 AMG: E55 18' Monos, K&N filters, H&R Sport springs, Bilstein Sport schocks, Full LED interior, LED License plate, 8k HIDs head/fog lights, 10mm spacers, resonator + 2 sec. cats deleted, AMG license plate cover, AMG flat hood badge, matte black front grill, AMG pedals, 35% tint, yellow calipers, CF door pins, SS brake lines, Hawk HPS pads.
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  6. #6 Default  
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    I emailed the previous owner and asked why the car failed inspection. His response was exhaust leak and bald tires. Which is hilarious considering the car only has 70% of an exhaust system.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
    Motorcycles - KZ400 Cafe Build, XS500 Build
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  7. #7 Default  
    Don't get a 911.
    Oh Yeah!
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  8. #8 Default  
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    Quote Originally Posted by cheu_f50 View Post
    Don't get a 911.
    Chances of me finding a lemons money 911 are super slim. But a front engined rotary 911 would be the ultimate troll car.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
    Motorcycles - KZ400 Cafe Build, XS500 Build
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  9. #9 Default  
    Remember the time you had a left over Porsche part and you couldn't even give it away.
    Oh Yeah!
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  10. #10 Default  
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    No. Selective memory is awesome.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
    Motorcycles - KZ400 Cafe Build, XS500 Build
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  11. #11 Default  
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  12. #12 Default  
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    Tom is an enabler. Thank you Tom.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
    Motorcycles - KZ400 Cafe Build, XS500 Build
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  13. #13 Default  
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    I'm thinking I should provide some updates to this. I'll try tonight.

    for now here's a 13B on an engine stand with a lot of parts removed.

    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
    Motorcycles - KZ400 Cafe Build, XS500 Build
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  14. #14 Default  
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    I see oil everywhere, clearly its blown up...
    The disease runs deep, relapses often, not looking for a cure, just another sick bastard to share it with.
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  15. #15 Default  
    what theme is this car going to be?

    can we make it the brave little toaster?

    Oh Yeah!
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  16. #16 Default  
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    Someone on the west coast is already running an XB as a toaster, complete with toast like that.

    No idea on theme yet, but we're going to need one.
    Futility Motorsport - 1989 Dodge Daytona Shelby (dead), Saab 9-5 Aero Wagon, BMW 313rx
    Quote Originally Posted by buzztt View Post
    you are definitely one seriously dedicated, possibly certifiable individual
    Motorcycles - KZ400 Cafe Build, XS500 Build
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  17. #17 Default  
    Quote Originally Posted by cegan09 View Post
    Someone on the west coast is already running an XB as a toaster, complete with toast like that.

    No idea on theme yet, but we're going to need one.
    fine make it look like a cannoli.
    Oh Yeah!
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  18. #18 Default  
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    Japanese powered German car, right?

    Axis powers, woo!
    "It was more passionate than just cuddling"
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  19. #19 Default  
    I feel like I have blood on my hands for helping with this
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  20. #20 Default  
    picktures
    Quote Originally Posted by bigben View Post
    You.... have problems.
    Quote Originally Posted by Big Pete View Post
    you have issues.
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