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  1. #1
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    Will these carbs work

    Will ether one of these be a better replacement for the traxxas carb on a 3.3 I got them both off eBay for 6 bucks.

    2carbs
    1. OS 20E came off a NOS rg.21 never ran
    2. RB nova mega, novarossi carb. Came from a nova mega JP black buggy motor which had about 8 tanks before we were sponsored and switch to OS.

  2. #2
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    If it came off the same size engine then I on't see why not. You'll probably have to screw around with the carb a lot.
    Whats wrong with the 3.3 carb?
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  3. #3
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    I have been reading a lot about it being to small for that size of a motor
    Wich is why people use the losi 3.4 carb

  4. #4
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    Quote Originally Posted by Emaxx1991 View Post
    I have been reading a lot about it being to small for that size of a motor
    Wich is why people use the losi 3.4 carb
    Okay that sounds better. It might be easier to tune but I don't know.
    "I like rc cars"....."WHAT? YOU'RE KIDDING!"

  5. #5
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    Quote Originally Posted by Emaxx1991 View Post
    I have been reading a lot about it being to small for that size of a motor
    Wich is why people use the losi 3.4 carb
    really?? a losi 3.4 carb??

  6. #6
    RC Turnbuckle Jr. Wolfslash16's Avatar
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    Ya, the TRX carb that comes stock on the 3.3 was designed for the 2.5, so they changed nothing and put a small carb on a bigger engine, but the losi 3.4 carb was designed for the 3.4 engine, so putting it on a TRX engine will give you more fuel flow and more air flow, = more power. Just my .2 cents!
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  7. #7
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    where can I get one??I looked on ebay but couldnt find just a 3.4 carb.I would be willing to try it

  8. #8
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    ahh ha I found one on aim hobbies 39.00

  9. #9
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    They work great, they are a 7mm carb. RB523tm carb are good if you can find one and they are 8mm. I just turn what ever carb I have down to fit.
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  10. #10
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    I turned both carbs today but they wont work in my revo there to big and hit the spur

  11. #11
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    Ok so here are the throat measurements of each of the carb
    STOCK TRAXXAS 3.3 carb 6mm
    OS carb not sure model 7mm
    And the carb I want to use
    RB NOVE 8.8mm

  12. #12
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    Show a pic if you can where it is hitting. I had to grid the outside of the carb body also depending what car it's going in
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  13. #13
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    I got it to clear the flywheel by grinding a little on it and I think I can cut a little off my air filter to clear the spur but the slide is a lot longer then the stock carb so I think this would fix it http://www.teknorc.com/shop/tkr1011-...-revo-2-5-3-3/

  14. #14
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    Can anyone confirm this or do I need to buy throttle mount

  15. #15
    RC Turnbuckle Jr. Nitronaught's Avatar
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    Just remember, most metal carbs have an insulative sleeve to thermally de-couple the carb from the engine's heat. One of the reasons why Traxxas uses a composite carb.....
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  16. #16
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    Doesn't make much difference if your running on road. Helps a little in off road.
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  17. #17
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    I have the insert it's a 7.5mm

  18. #18
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    I don't think that carb is going to work though there too tall and the slides are long

  19. #19
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    Just got done putting a force .28 in my 3.3...... yes it took a while, you cant just turn down the carb or it will crack what little metal is left when you tighten it down on engine. You must take off the metal portion that slides into engine and then a little of the composite underneath and then take an old stock carb and remove the metal part from body of carb and bore it out to fit what is on the 28 carb, epoxy it to it and your done. All i can say is wow, it definitely woke the 3.3 up!!! Idles tons better, off idle is better, and top end is amazing!!! Tuning is no comparison! Very easy to get the sweet spot. i do have a flow bench and need to make some adapters to flow these carbs and try to find more flow......

  20. #20
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    I wish I could get my hands on a bunch of those RB523 carbs.
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  21. #21
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    Quote Originally Posted by Rick B View Post
    I wish I could get my hands on a bunch of those RB523 carbs.
    I hear you there sir. I have found some old rc's with them in cheaper than what the carb is worth. I like the force. 28, composite with aluminum important parts, and can be found for around $20. Thinking of trying to turn down an adapter "plug" to work in the 3.3. Would make it a ton easier to get to fit.

  22. #22
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    Already working on that.
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