# Controller Programming (speedometer) **URL:** \ **Category:** NEV & LSV Forum\ **Created:** [July 22, 2012, 6:54pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623 "2012-07-22T18:54:44Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [July 22, 2012, 6:54pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/1 "2012-07-22T18:54:44Z")
Is there any programming that can be done to the controller to correct the speedometer for tire size or transaxle ratio changes? I see you can get a CD to allow a laptop computer with a serial or USB cable to reprogam the GE controller. ---
**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\ **Post date:** [July 22, 2012, 11:00pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/2 "2012-07-22T23:00:05Z")
Marlon in the San Diego area can help you with this if you are close… if not close he might lend you the equipment… wmgrd@yahoo 619-247-4044 evenings until 1am west coats time Bob ---
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [August 29, 2012, 5:37pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/3 "2012-08-29T17:37:39Z")
I’ve had a good experience with Marlon. I rented a GE controller handset from him and calibrated my speedometer to 12" tires and got the Gem to do 35 on flat land. ---
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [September 15, 2012, 5:56pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/4 "2012-09-15T17:56:27Z")
Now that I have the extra juice for my 5 hp motor I made a heat sink for the motor out of inexpensive parts. Hopefully this will aleaviate the need for a 7.5 hp up grade. See my video at: [GEM Car “GE Motor Heat Sink” - YouTube](http://www.youtube.com/watch?v=azy8XBpxXDY&feature=youtu.be) ---
**Author:** ![LuvMyTJ](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/luvmytj/32/537_2.png) [@LuvMyTJ](https://community.electricforum.com/u/LuvMyTJ)\ **Post date:** [September 16, 2012, 7:21am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/5 "2012-09-16T07:21:17Z")
Lookin’ good Chuck! Let us know the before & after temps you are seeing. ---
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [September 16, 2012, 7:39am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/6 "2012-09-16T07:39:46Z")
[QUOTE=LuvMyTJ;12541]Lookin’ good Chuck! Let us know the before & after temps you are seeing.[/QUOTE] Before 175 F. After installing the heat sink 130 F at 35 mph run on level ground. I thought about putting some aluminum antiseize grease under each fin for better heat conduction. But I don’t need it. Now if I lived in a hotter climate I would. I did add the copper spacers so that the heat sink covers 3/4 of the motor. Plus it spaces the “U” channels out so that air can get to each fin. The heat sink is over the field and armature coils where most of the heat is generated. ---
**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\ **Post date:** [September 16, 2012, 11:41am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/7 "2012-09-16T11:41:29Z")
and the next question… will you go into production and sell a few on these? Bob ---
**Author:** ![LuvMyTJ](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/luvmytj/32/537_2.png) [@LuvMyTJ](https://community.electricforum.com/u/LuvMyTJ)\ **Post date:** [September 16, 2012, 2:25pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/8 "2012-09-16T14:25:06Z")
This is good news. I have wanted to go faster but was worried about the additional heat generated by the higher rpm’s. Your “heat sink” is a fantastic idea! ---
**Author:** ![Blackhorse](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@Blackhorse](https://community.electricforum.com/u/Blackhorse)\ **Post date:** [September 18, 2012, 2:20pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/9 "2012-09-18T14:20:15Z")
Chuck what settings you changed to get your current increse in speed ? ---
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [September 18, 2012, 3:01pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/10 "2012-09-18T15:01:29Z")
You will have to rent a GE Handset from Marlon and set F3, F7 and F20 so that more current gets to the motor and the speed limit is set to above 35 mph. In my case I had to check or change 50 settings on the controller. I have enough experience to be dangerous. Marlon is the man… ---
**Author:** ![Blackhorse](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@Blackhorse](https://community.electricforum.com/u/Blackhorse)\ **Post date:** [September 18, 2012, 3:12pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/11 "2012-09-18T15:12:12Z")
I have the GE Sentry for windows. Just doing some instructions before I dive into the microprocessor and attempt any changes. I may have to contact him also. Thanks ---
**Author:** ![LuvMyTJ](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/luvmytj/32/537_2.png) [@LuvMyTJ](https://community.electricforum.com/u/LuvMyTJ)\ **Post date:** [September 18, 2012, 5:10pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/12 "2012-09-18T17:10:12Z")
When I bring my Gem home from it’s summer duties I will have to contact you about renting your setup. ☎ ---
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [September 20, 2012, 12:57pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/13 "2012-09-20T12:57:12Z")
I thought some of you might be interested in my latest results after using Marlon’s GE Handset to re-calibrate the motor controller. Using his last setting recommendations I have two options now that are really neat. Turf mode has a gentle take off and a top speed of 28 mph. This allows me the original battery conservation and mileage. Street mode gives me a wheel squealing take off (surprised the heck out of me) and a top speed of near 40 mph on level ground and uses the battery at a somewhat faster rate. I put a heat sink on my 5 hp motor to help lower the motor temperature as I think you could fry it on long steep hills and sustained wide open driving. ---
**Author:** ![Blackhorse](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@Blackhorse](https://community.electricforum.com/u/Blackhorse)\ **Post date:** [September 20, 2012, 4:38pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/14 "2012-09-20T16:38:43Z")
Chuck, Thanks for the tip man. In addition to your heat sink that I will make later on. I mounted a temp gage and two sensors. I will spread the two sensors on different spots on the moter. But for now I have them close together. Maybe one on the gear box and one on the moter. Not sure yet still in the works. al ---
**Author:** ![chuckkent](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/chuckkent/32/536_2.png) [@chuckkent](https://community.electricforum.com/u/chuckkent)\ **Post date:** [September 20, 2012, 5:10pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/15 "2012-09-20T17:10:41Z")
Good…the gear box doesn’t get so hot. With the newer cars the motor is more exposed so you could mount more and longer fins and use the conductive grease. My e2 is lighter and hauls less weight. So the motor is taxed less than a e4 or e6… ---
**Author:** ![Blackhorse](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@Blackhorse](https://community.electricforum.com/u/Blackhorse)\ **Post date:** [September 30, 2012, 8:05am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/16 "2012-09-30T08:05:04Z")
I have a T4 that I mounted on a large heat sink with the other sensor under the controller. What’s the operating temp of a controller suppose to be ? al ---
**Author:** ![eSGEMColo](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.electricforum.com/esgemcolo/32/714_2.png) [@eSGEMColo](https://community.electricforum.com/u/eSGEMColo)\ **Post date:** [September 30, 2012, 8:34am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/17 "2012-09-30T08:34:33Z")
what model is the Taylor hear gauge? Bob ---
**Author:** ![Blackhorse](https://avatars.discourse-cdn.com/v4/letter/b/a9adbd/32.png) [@Blackhorse](https://community.electricforum.com/u/Blackhorse)\ **Post date:** [September 30, 2012, 9:35am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/18 "2012-09-30T09:35:04Z")
Taylor 1442 ---
**Author:** ![kn4bama](https://avatars.discourse-cdn.com/v4/letter/k/bc8723/32.png) [@kn4bama](https://community.electricforum.com/u/kn4bama)\ **Post date:** [September 23, 2013, 7:39pm UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/19 "2013-09-23T19:39:39Z")
Marlon, HELP, if you were going to buy new batteries what would you buy. If I am only changing batteries do I need to make any changes to my controller. I have Trogans now, looking CG-12s or Opitums what do you think, Thanks, Kenny 2001, e825 ---
**Author:** ![suesamh](https://avatars.discourse-cdn.com/v4/letter/s/58f4c7/32.png) [@suesamh](https://community.electricforum.com/u/suesamh)\ **Post date:** [October 27, 2013, 7:26am UTC](https://community.electricforum.com/t/controller-programming-speedometer/2623/20 "2013-10-27T07:26:18Z")
I just accuired a GEM e580 and top end is 15 mph./ what do i need to do to raise it a little [Next page](https://community.electricforum.com/t/controller-programming-speedometer/2623.md?page=2)