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Old 06-20-2008, 05:15 AM   #301
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I want to buy an 8t delta wound motor but cannot find anyware other than German shops to buy one.

Do Graupner ship direct to the uk? I tried to register on the website but there is no uk in the country option.

You have the Pro 8t and Dr. Speed 8t, what is the difference other than 15 grams & price?

https://shop.graupner.de/webuerp/servlet/AA?wgr=853
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Old 06-20-2008, 08:47 AM   #302
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the pro 8T does have more power, the dr. speed does have more rpm, but less power due to that it is easier to drive, but that should not be a problem with a 8T
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Old 06-20-2008, 12:15 PM   #303
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Thanks for your reply. Well I'm looking for a motor with top end of something like a 5.5 novak pro but with the bottom end of a 8.5. Sounds like the Dr.Speed is not very durable so the Pro would seem a good choice. Maybe I would be better with a 9t?

Would you know if any have been distributed to the uk? Or any shops on the continent that would ship to the uk?
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Old 06-20-2008, 01:04 PM   #304
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From the new Pro series I have a 9.5T star and a 9T delta laying here. Both are looking much better than the Dr. Speed. Two weeks ago I tried the 9.5T and this one was very fast (for a 9.5T). The delta I will try later.

Also I heard the Dr. Speed rotors/magnets are not working very long with full strength. The Pro should be much better because those are very similar to the EVO3 series. For a smoother bottom end you could replace the original 12.5 mm rotor with a 12mm rotor. Thats what I will try.

Maybe the 9T delta will be similar to a 5.5T or something between a 4.5T and a 5.5T star.
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Old 06-21-2008, 11:08 AM   #305
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The Dr. Speed motors might be only suitable for 1/12th or 2wd offroad. Limited current situations.

I went into a local modelshop today and ask the assitant if he could get GM products in and he looked like this ->



With Chris Crainger doing so well I would expect GM to be everywhere.
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Old 06-22-2008, 03:03 PM   #306
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OMG. Had my first meeting with the 6T delta motor and the power is incredible. And even better than that is the amazing efficiency. Not even the slightest hint of dumping. Thanks for all the advice on gearing.

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Old 06-23-2008, 12:09 AM   #307
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i race on a gascar track this past weekend

length of centerline: 320m/lap
length of straightaway : over 60m with 2 fullspeed sweepers at each end

fdr: 6,6 runtime -> discharged 700mah after the run .. so no worries

for speedfreaks you can gear like 6,2ish .. was even faster :-)
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Old 06-29-2008, 09:28 AM   #308
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Just saw a picture of the GM Genius 120 brushless and it looks good. Where can I find more information on it?

Also, will they come with the LCD programmer?
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Old 06-29-2008, 01:34 PM   #309
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it will come with a usb pc-interface as programming at the track is no longer necessary as you can do everyting at home.
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Old 06-30-2008, 01:37 PM   #310
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Quote:
Originally Posted by Martin Hofer View Post
7T + 6.3 gearing is totally undergeared ... gearing longer will increase runtime in that case as you do not need to use that much throttle to do the same speed

I'd run a 6T with 6.0 - 6.3 on a 18sec/lap course!

just try to really lower the fdr and you will from some point on notice that you gain runtime
Practiced on a very fast 13s track today and the Evo 3 7T delta I used was very fast...for 4.40s, then dump. I tried fdr from 6 to 7 but still very hard to make runtime. Using mode 3 on the speedo helped a little bit. My motor isnīt the new Pro, is it a big difference between the new and old one?
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Old 06-30-2008, 01:45 PM   #311
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no there is no big difference

you dumped with a 7t?
how did u gear it and what batteries did u use?
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Old 06-30-2008, 02:54 PM   #312
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I use IB4600. First battery I geared 6.1 and I started to loose runtime around 4.30 mark. Then I tried 6.5, the car was just as fast but I only gained 10s runtime so around 4.45 the car started to loose the pace considerably. I donīt feel that I could go to a smaller pinion because the motor already had a lot of rpm down the straight. The motor was around 65C and speedo 70C so no heat problems.

I also tried a LRP 4.0 and had problems with runtime. Maybe something wrong with the speedo? Itīs brand new, second practice session.
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Old 06-30-2008, 03:09 PM   #313
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i don't think there is anything wrong with the speedo.

i rather think a bearing of the 7T is broken and does not spin freely.
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Old 07-01-2008, 02:32 AM   #314
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The bearings are fine. Iīm puzzled by this because I havenīt had any runtime issues before wtih GM stuff and are not having it with a Nosram speedo and motor. But thanks for all the help!
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Old 07-01-2008, 02:41 AM   #315
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did you gear the motor longer in combination with the gm speedo in comparison to the nosram speedo? as the gearing has to be different quite a bit.

if you do not dump with the nosram esc than you cannot dump with a propper geared gm.
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