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noob question about Mega G+

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  • noob question about Mega G+

    Bought a couple mega g+ cars to supplement my old 440-x2 & super G stuff, put the mega g+ on the track... what the tarnation?!? ...tried a few different controllers, I barely touch the trigger and it's like an explosion of car flying off the track... what gives? Tomy 22 volt wallwart?

    Any help will be appreciated.

    Thanks,
    Edr.

  • #2
    Edr,
    This has been discussed here a bunch of times but these particular cars need a controller with very high resistance. Most people that run these are using 120 ohm controllers. I have read that some older AFX controllers will work but most people seem to just buy the current AFX controllers.
    If you have any Parma controllers you should be able to get 90-120 ohm replacement resistors that will also work.
    Good luck, Randy

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    • #3
      I have tested several Mega G+ cars on my track at 18.5 volts and a controller with a 90 ohm resistor worked just fine, in fact I could get by with a 60 ohm controller. If you have a Tri Power power supply set at Expert you will have 24 volts. At 24 volts with a 90 ohm controller a Mega G+ car was undrivable on my track, a 120 ohm controller would have been little better in my opinion. At 22 volts the car was on the edge with a 90 ohm controller, a 120 ohm controller would have been better. At 20 volts the car was quite drivable with the 90 ohm controller.
      If you want something more robust than an AFX controller Parma Economy controllers are once again available and One Stop Slot Shop has 120 ohm resistors that fit Parma controllers.

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      • #4
        As has been said, the MegaG+ cars were designed to work with 120 ohm controllers. Rich is correct in his testing with lower ohm units.

        Charlie

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        • #5
          Thank you gentlemen! 60 ohms is presently the highest controller I have, the stock controllers that came with the track won't work to even try it out, so a 120 ohm resister it will be. I tried searching before I posted but hadn't found anything, sorry, I'll work on my searching skills here.

          Regards,
          Ed

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          • #6
            You can buy 120 ohm controllers from afxracing.com, but they are set controllers. They work, but are not the best. Parma, etc. feel much better.

            Charlie

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            • #7
              DS makes a 120 ohm controller and they are comparable, price wise with parma. I have a DS 25 ohm and consider it to be much better than the parma. I have a half a dozen parma's which are great too.

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              • #8
                I got a pair of the latest AFX 120 Ohm (for Mega G+) controllers for cheap on the well known auction site just to try the feel with the older Mega G (non +) cars. I prefer them to the older controller that came with the Mega G set because they allow for much easier control of the car speed; it's easier to crawl or accelerate fast, as desired, even at the high V setting of the tri-pack.

                Opinions differ of course about how the controller feels in the hand, quality, etc. but IMHO for the price (even at MSRP) it's worth trying them out to see if you like them.

                MSM

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                • #9
                  I have 8 Mega G+ cars that I run with 40 year old AFX controllers with no problem at 18 volt. Very fast yet you can drive them in the corners. 24 volts would be way too much juice for my 8 ft straights. of course I have never had the opportunity to try a fancy controller to actually feel the diff

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                  • #10
                    Just for kicks I tried a Mega G+ car with an old Atlas 85 ohm thumb controller at 18.5 volts and that was OK on my big oval with 24 inch radius turns and 12 foot straights. At 24 volts the controller was still OK on that track. I am doing a big race this weekend, after that is over I will convert the track back to its road course configuration and try the Atlas controller again.

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                    • #11
                      Got a 120 ohm resister today, will put it in a parma and see what happens, may also add a switch and some other resisters to make it multipurpose. I don't remember what needs to be done to add coast...

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                      • #12
                        Originally posted by Edr View Post
                        Got a 120 ohm resister today, will put it in a parma and see what happens, may also add a switch and some other resisters to make it multipurpose. I don't remember what needs to be done to add coast...
                        I, for one, would certainly appreciate more details about adding the switch and resistors if you care to share.

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                        • #13
                          Here is a controller with added variable brakes and coast.





                          A 175 ohm rheostat is used as both the brake and coast control. In brake mode the rheostat is in the brake circuit, in coast mode it is between the brake contact and the full speed contact. A center off switch selects brakes-off-coast. In coast mode when the controller is in the off position voltage goes to the car, how high that voltage will be is controlled by the rheostat.



                          Here is a controller with variable ohms. There is a 500 ohm rheostat wired in parallel with the 45 ohm resistor. The ohms can be dialed as low as 25 and there is a switch to take the rheostat out of the circuit. Be aware that with controllers of this type the ohms may be the same at the very beginning of the trigger pull but as you pull the controller more the response will be more like the main resistor alone.







                          There are actually two ways that you can connect the extra resistor, I used the first one. For the second scheme you would have to solder a wire to the beginning of your regular resistor, which might be a little tricky.
                          Last edited by RichD; 09-17-2017, 06:42 AM.

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                          • #14
                            Thank you Rich D.!

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                            • #15
                              Or, you could just run them on an Artin track, where they feel more at home...

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