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Unread 02-11-2018, 05:08 PM   #1
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Default Exactly what is Speed code 4.

The more I think about it, is it just an increase in RPM's that the controller will allow a motor to do? regardless of what motor it is controlling. If that's the case then $100 seems pretty much a real rip off for setting a simple computer constant.

Hard to imagine it could be much more. Only way to gain speed if all things remain the same on a cart would be to spin the tires faster. Only way to do that is to spin the motor faster.
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Unread 02-11-2018, 05:28 PM   #2
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Default Re: Exactly what is Speed code 4.

You are correct. But some motors are made to run faster at 48 volts than others. All DC motors will run faster when you apply more volts. Your cart will fun faster on a fresh charge than when the batteries are low even with the controller putting a limit on the rpm.
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Unread 02-11-2018, 06:29 PM   #3
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Default Re: Exactly what is Speed code 4.

The Curtis OEM Controllers have Club Car custom variables that have been pre-defined.

Some of those settings are to meet regulations like: Commercial speed, golf cart slow, golf cart fast, etc...

Club Car just chose those numbers (Speed 1,2,3,4 ) to represent one of those speed requirements.

I imagine 19.2mph (speed code 4) is a compromise between what can be reliably/safely achieved and the increase liability of the faster speeds.

I may be wrong but most of that fee is Club Cars price for the unlock codes needed to program speed 4.

I agree there are not many circumstances where paying for speed code 4 is a good investment.
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Unread 02-11-2018, 10:36 PM   #4
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Default Re: Exactly what is Speed code 4.

Interesting way to view it. When you're on a forum like this you don't consider the liability aspect.

So it's very likely that speed code 4 isn't even the physical top speed of a stock CC. It's the limit of what the company thinks is the safest fast speed for their product. That must be the reason a cheap speed magnet can go faster then speed code 4 will. Still think CC is really gouging the consumer on this one.
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Unread 02-12-2018, 12:37 PM   #5
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Default Re: Exactly what is Speed code 4.

It's in part to keep people from wrecking golf courses with it. Mode1 is for airports, limited to 8mph and something like 10A min field. 2 and 3 are for golf at 13 and 15ish mph. 4 is just under 20 and usually intended for use as an LSV in gated communities and such. But with no seat belts, no brake lights, insufficient mechanical brakes and suspension.

Programming wise, the number set on the handset just changes the max RPM before the control starts to cut back the armature pwm to maintain at or below the max set speed. Or in the case of mode 1 raises the field min to limit the speed.

I am not certain on all the specifics but depending on area of use and state law if it goes over a certain speed then it needs those things, and a registration. But usually to use it on the road it needs to go at least 20, 25 or 35. So if they keep it at 19.6 then they can avoid the cost of having to install extra equipment for carts that may just be used on a course. Then I guess the cost of the unlock code is just a deterrent for high speed to be set unless its actually needed.
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Unread 02-12-2018, 03:57 PM   #6
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Default Re: Exactly what is Speed code 4.

You're right. Speed setting 4 just allows the motor to run at a higher RPM. It does nothing to increase power or any other aspect of the system. You're just raising the rev limit. Nothing more. The reason Club Car dealers bill you for the code is because Club Car bills them for the code. Originally. the dealer had to place an order as if they were ordering any ordinary part. Part number 102258101 is a Private Speed Code. Their system will allow you to enter the controller serial number along with the vehicle serial number. The dealer will then receive their shipment of parts. The Private Speed Code "Kit" will include a booklet with instructions, a sticker with the Code A, Code B, and Code C for your specific vehicle, and a safety sticker. There is now a new way to do it. Club Car's system will allow you to enter this information and it will instantly show you the codes on the screen. You must agree to the terms that you will install a safety sticker on the vehicle when you use this method. I always do mine this way when the customer wants a speed code in their cart. I'll save the codes as a PDF and email them to the customer so they'll have them on record and install the sticker myself. I have a whole pile of safety stickers just for this reason.
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Unread 02-13-2018, 07:32 AM   #7
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Default Re: Exactly what is Speed code 4.

I've still been trying to work up the determination to sit down and figure out their encryption for this unlock code. Its related to the vehicle SN, the control SN, and control hidden SN somehow.

Still bugs me the way its done on this control. It forces the speed mode setting out of range. Problem with this being the Handsets like to bring everything back in range... EZGO's setting structure with ClubCar's unlock method would be the best solution. No hardware needed, freedom to change it down from that speed mode easily and temporary if needed.
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Unread 02-13-2018, 09:37 AM   #8
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Default Re: Exactly what is Speed code 4.

Quote:
Originally Posted by mjroman20 View Post
I've still been trying to work up the determination to sit down and figure out their encryption for this unlock code. Its related to the vehicle SN, the control SN, and control hidden SN somehow.

Still bugs me the way its done on this control. It forces the speed mode setting out of range. Problem with this being the Handsets like to bring everything back in range... EZGO's setting structure with ClubCar's unlock method would be the best solution. No hardware needed, freedom to change it down from that speed mode easily and temporary if needed.
When I first got my cart I played with that for a while as well.

I think the Cart S/N is only required for liability purposes so they know if the controller is on the original cart it was issued for in case of an accident.

Since those controllers do not have very robust math capability, and devoting too many resources to create a complex algorithm for such a limited piece of functionality is unlikely, I went after the common "logic" methods of encrypting data on micro-controllers (inverting, bit-shifting and OR/AND/XOR bit-masks).

After doing some brain exercise for a while, it occured to me that it would not be a good financial move for a product that is distributed internationally to depend on some weak encryption that once broken could eliminate a very profitable income stream.

I came to the conclusion that the best implementation would be to have the A, B and C codes "randomly" selected and already saved in each Controller memory.

That way when you call Club Car, they are just doing a database lookup to see which of the 999,999,999 possible numbers were assigned to that specific controller.
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Unread 02-13-2018, 10:09 AM   #9
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Default Re: Exactly what is Speed code 4.

OK, riddle me this then? How are these guys getting around it for only $15 shipping when you buy their D&D motor.

Quote:
If you wish to use your current controller it needs to be updated to this new field map or it could cause failure to both the motor & controller. You are welcome to send your controller to us to be programmed for a fee of $15 to pay for shipping the controller back to you.
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Unread 02-13-2018, 11:38 AM   #10
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Default Re: Exactly what is Speed code 4.

Quote:
Originally Posted by Cruise Master View Post
OK, riddle me this then? How are these guys getting around it for only $15 shipping when you buy their D&D motor.
You need to put some context around this question, who said that and in reference to what Controller?

Speed code 4 has nothing to do with field maps.

Speed motors for IQ controllers already have a speed magnet installed to circumvent the speed limitation.

Speed motors for Excel controllers I believe have the armature/commutator phase advanced so it becomes a poor generator and fools the Excel speed test.
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