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Old 04-02-2011, 02:51 PM   #2431
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Questions?? GM settings 21.5

Hi Guys,

Im coming back to RC after a year out. Im looking at getting a GM 75 speedo and a GM 21.5 motor. (i used to run 13.5 class)

I still have my PC software and im just wondering what settings are a good starting point?

Mode 9 or still Martin Hofers stock setup?

Cheers
T
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Old 04-02-2011, 04:35 PM   #2432
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Quote:
Originally Posted by Toblerone View Post
Hi Guys,

Im coming back to RC after a year out. Im looking at getting a GM 75 speedo and a GM 21.5 motor. (i used to run 13.5 class)

I still have my PC software and im just wondering what settings are a good starting point?

Mode 9 or still Martin Hofers stock setup?

Cheers
T
I'd start with Martin's settings file and go for something like:
7000RPM switchpoint
80A current limit
25deg timing

Then check the temp of the motor. If it's cool, crank the timing up a couple of degrees at a time and repeat till it gets close to the temp limits (I try to stay below 70degC). You'll probably end up on 30deg timing but its best to start low and work up.
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Old 04-03-2011, 02:53 PM   #2433
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Quote:
Originally Posted by MattW View Post
If you haven't played around with any settings, then mode 2 would be 0 timing I believe.
That's right, mode 2 after a factory reset (it's on the roar rules as well as an approved speedo)
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Old 04-05-2011, 02:24 PM   #2434
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Originally Posted by chris_dono View Post
That's right, mode 2 after a factory reset (it's on the roar rules as well as an approved speedo)
Hi!

I take some info from my memory that all Reseverd* should be 0.
Then speedo should blink in neutral.

Maybe I will test it

m.
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Old 04-05-2011, 06:45 PM   #2435
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Quote:
Originally Posted by M.Abramowicz View Post
Hi!

I take some info from my memory that all Reseverd* should be 0.
Then speedo should blink in neutral.

Maybe I will test it

m.
you dont need to get into that deep, usb adapter not required.

as said, factory reset(press and esc hold button for about 5 sec, listen to beeps, let go, press again until it starts beeping again, usually about another 5 sec), it is now in mode 2. Sounds complicated, but very simple.
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Old 04-11-2011, 04:06 AM   #2436
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Default GM 4.5 modified speed controller settings

Hi guys I have been racing at club level using GM 10.5 motors for a while now and have bought a GM 4.5 motor to give it a try.
I ran it for first few times at my local track which is Mendip(Weston Super-mare UK) which is a large out door asphalt track and have been having trouble with motor getting hot and loosing power after about 3 minutes I tried changing gearing but still could not get motor to stay at a reasonable temp.
The only way could get motor to work properly was to take off the sensor wire and then I found I was running under geared and the motor was coming off only cool so geared up and was fine only thing was that acceleration was blisteringly fast and at times a handful to control.
So if anyone could advice me or send me some settings I should be using with GM GM 90 2010 speed controller and whether I should be running sensor or sensor less would be most appreciated as a while back I did get help when started racing with GM 10.5 pro stock from people on this forum which made things so much easier as I was at the stage of giving up the sport with the problems I was having
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Old 04-11-2011, 04:18 AM   #2437
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Easy. Update the firmware to the newest version and use the V13basic file from Hofer. Then change this settings:

Amp Limit: around 180A
Switching Point RPM: 35000
Fixed Timing: 12
Max Timing: 13
Motor Cut Off: 115

All this in the How-to Martin wrote a while back.
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Old 04-11-2011, 04:22 AM   #2438
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that is the timed option which is pretty heavy on a 90 controller
originally the 90 is max 5.5T
safe option would be standard mode2
but for both you need to be soft on the throttle!
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Old 04-11-2011, 06:03 AM   #2439
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Quote:
Originally Posted by jorgesimes View Post
Easy. Update the firmware to the newest version and use the V13basic file from Hofer. Then change this settings:

Amp Limit: around 180A
Switching Point RPM: 35000
Fixed Timing: 12
Max Timing: 13
Motor Cut Off: 115

All this in the How-to Martin wrote a while back.
Could you post a link to the Martin Hofers page for the V13 basic settings file and download links.
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Old 04-11-2011, 07:01 AM   #2440
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http://www.rctech.net/forum/7908081-post1851.html

Hara used that configuration (GM90+GM PRO4,5) in a ETS, so for sure it will be safe.
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Old 04-12-2011, 03:26 AM   #2441
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Thanks for link will give it a go and let you know how i get on.
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Old 04-12-2011, 03:32 AM   #2442
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For ETS/Poland I put to car:
- gm 90V2,
- pro 5.5T gm (grey can).

Mode 3 with only changed from 0 to 30 in timing WITH sensor.

ROCKET!

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Old 04-20-2011, 12:59 PM   #2443
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Hi all, i am running a gm 75 with gm 13.5 stock motor. Can you suggest a good motor with this esc? All tekin and lrp cars are faster in straights. I am running martin's program v13 with an fdr of 4.73. Any suggestion pls?
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Old 04-20-2011, 01:08 PM   #2444
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Hi,

I run a GM75 with GM 13.5 motor geared at 4.70 and it's plenty fast enough easily up there with the Tekin's etc. Our track has a long straight (45m) and it's pretty flowing.

Have you tried gearing up even more ? is it quick infield ?

Add some more timing if it's not hot.
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Old 04-20-2011, 02:13 PM   #2445
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Quote:
Originally Posted by S.A.W View Post
Hi,

I run a GM75 with GM 13.5 motor geared at 4.70 and it's plenty fast enough easily up there with the Tekin's etc. Our track has a long straight (45m) and it's pretty flowing.

Have you tried gearing up even more ? is it quick infield ?

Add some more timing if it's not hot.
Can you please send me the setup you are using to see what is the difference against mine?
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