# The need for speed **URL:** \ **Category:** GEM Forum\ **Created:** [June 9, 2016, 8:24am UTC](https://community.electricforum.com/t/the-need-for-speed/6126 "2016-06-09T08:24:45Z")\ **Posts on this page:** 19\ **Page:** 1
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 9, 2016, 8:24am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/1 "2016-06-09T08:24:45Z")
I have a 2005 Gem with a bad controller. I would like to do a speed upgrade (at least 35) while I am at it. What seems to be working well. I see guys that offer to rebuild controllers and 7.5hp motors. Already have 195-14 tires and wheels and from what I read 10.35 : 1 gears. Has anyone had any luck at this? Thanks for any help. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [June 9, 2016, 10:01am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/2 "2016-06-09T10:01:20Z")
Which controller? What problem? ---
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 9, 2016, 10:06am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/3 "2016-06-09T10:06:21Z")
T3 and I am pretty sure it is toast. I followed the flow chart in the service manual pretty close. I am just looking for folks that have made this up grade to get their opinion of the results. ---
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [June 9, 2016, 10:10am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/4 "2016-06-09T10:10:29Z")
Yeah - as long as your controller is bad any way upgrade to a T4. The T3 is pretty limited. For 35MPH you will have to up grade your motor to a RFF. motor. At 35 MPH with your setup you will be turning 5500+ RPM. A stock motor doesn’t like over 5000 RPM for very long. If you stay at 30 MPH it should live forever. ---
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 9, 2016, 10:20am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/5 "2016-06-09T10:20:18Z")
Thanks for the post. Is it a big deal to change to a T4. And point me toward an RFF motor that is new to me. Was looking at a blue motor but! ---
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [June 9, 2016, 10:23am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/6 "2016-06-09T10:23:17Z")
DandD builds Ride for Fun And MZ Motor Sports (Blue and Black) motors. ---
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 9, 2016, 10:25am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/7 "2016-06-09T10:25:04Z")
What is an RFF motor. is The D&D motor a good setup. ---
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [June 9, 2016, 10:28am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/8 "2016-06-09T10:28:36Z")
Ride For Fun is the dealer D&D is the manufacturer ---
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 9, 2016, 10:34am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/9 "2016-06-09T10:34:37Z")
What is involved in changing from the T3 to a T4 controller. Are they a direct replacement ---
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 9, 2016, 11:07am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/10 "2016-06-09T11:07:23Z")
I think there is someone in FL that can flash program the T4. Any Idea who it is? ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [June 9, 2016, 1:10pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/11 "2016-06-09T13:10:04Z")
To what effect? Correct speedometer? I’m looking for a junk T3 if you end up with one. ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [June 9, 2016, 1:18pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/12 "2016-06-09T13:18:55Z")
My 2010 5hp 12/1 EL runs 35mph with 24" tires and MM. Lead and T4. Motor may not last. Not an issue for me. Can’t be worse than running 100 volts in my E4 7hp.🙂 See signature… ---
**Author:** ![anix](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anix](https://community.electricforum.com/u/anix)\ **Post date:** [June 10, 2016, 5:24am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/13 "2016-06-10T05:24:40Z")
Not sure about the T3 vs T4 issue, just trying to learn a little. I was told that the T4 could replace the T3 and had more turning chooses and understand I don’t know this for sure that is why I am asking you guys.:noidea: ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [June 10, 2016, 7:09am UTC](https://community.electricforum.com/t/the-need-for-speed/6126/14 "2016-06-10T07:09:20Z")
I believe you are correct, that’s why I’d like to have a T3. To look for work arounds. Some have issues with speed. [http://www.electricforum.com/cars/gem-nevs-forum/9953-gem-wont-go-over-29-mph.html](http://www.electricforum.com/cars/gem-nevs-forum/9953-gem-wont-go-over-29-mph.html) Some not. [http://www.electricforum.com/cars/gem-nevs-forum/9976-2005-build-update.html](http://www.electricforum.com/cars/gem-nevs-forum/9976-2005-build-update.html) ---
**Author:** ![Gem\_e2](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/gem_e2/32/1849_2.png) [@Gem\_e2](https://community.electricforum.com/u/Gem_e2)\ **Post date:** [June 10, 2016, 12:13pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/15 "2016-06-10T12:13:32Z")
Hi if you not get over 29 did you try to change software in your T3 ? try to change from GL7L to GL8L ---
**Author:** ![Old\_Houseboater](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/old_houseboater/32/544_2.png) [@Old\_Houseboater](https://community.electricforum.com/u/Old_Houseboater)\ **Post date:** [June 10, 2016, 12:39pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/16 "2016-06-10T12:39:30Z")
An explanation on how to do that might be a good idea. Also a reason why. This is new information not posted before. Educate us as to what this is and how it might help us please. Rodney ---
**Author:** ![Inwo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/inwo/32/1067_2.png) [@Inwo](https://community.electricforum.com/u/Inwo)\ **Post date:** [June 10, 2016, 12:54pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/17 "2016-06-10T12:54:53Z")
Firmware? Is it available? ---
**Author:** ![LithiumGods](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/lithiumgods/32/672_2.png) [@LithiumGods](https://community.electricforum.com/u/LithiumGods)\ **Post date:** [June 19, 2016, 9:33pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/18 "2016-06-19T21:33:51Z")
I can program a t4 to do what ever you would like . ---
**Author:** ![Rascal](https://avatars.discourse-cdn.com/v4/letter/r/439d5e/32.png) [@Rascal](https://community.electricforum.com/u/Rascal)\ **Post date:** [June 20, 2016, 8:50pm UTC](https://community.electricforum.com/t/the-need-for-speed/6126/19 "2016-06-20T20:50:37Z")
> [@kinghappy;31333](#): > > I can program a t4 to do what ever you would like . The man to see and he’s in Florida… very reasonable fee.