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Old 05-22-2008, 07:55 AM   #1
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Questions?? Pinion gear for electric Mugen truggy

i am getting a 4.5 HV and i want to know what tooth pinion gear i should use for that truggy

link please
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Old 05-22-2008, 08:07 AM   #2
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1. smallest pinion you can find (9 or 10 tooth)
2. don't get the 4.5... it's way too hot for a truggy. You want the 7.5HV, and make sure you get the 5mm shaft version

http://www3.towerhobbies.com/cgi-bin...?&I=LXUYN5&P=7
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Old 05-22-2008, 09:06 AM   #3
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I'll second the "Don't get the HV4.5". I've been running a 9 tooth pinion with a HV6.5 in a GS Storm.
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Old 05-22-2008, 09:55 AM   #4
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The 7.5 sounds nice. I used to run a 6.5 and gearing had to be perfect. A 4.5 would be a nightmare.
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Old 05-22-2008, 08:41 PM   #5
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If you go to the Novak website it lists the suggested pinion tooth count for the 5.5, 6.5 or 7.5 motor only. If you click on any of the PDF's for the conversion kits the 4.5 is listed for Top Speed Runs ONLY. So basically for short straight shot runs on a smooth surface. I'd get the 7.5 (3000/kv). But I'm 99.9% sure we'll see a 8.5, 9.5 etc with even lower KV ratings. Something around 2400/kv on 4S is perfect.

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Old 05-22-2008, 08:48 PM   #6
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I think the only way I would even try the 4.5 would be on 3S for sure. way high Kvs.
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Old 05-22-2008, 09:03 PM   #7
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You would still need the truggy diffs in a buggy. I'm going to run the Neu 1509 1.5D (4500/kv) in my MBX5R with the truggy diffs and 3S battery. With the HV 4.5 at 5000/kv, there is no way you can run it in a buggy on 3S regardless of how small a pinoin you have (except for top speed runs. But on the track it'll thermal real quick). The RC8 is the only buggy with truggy diffs but they are 43/10 (my MBX5T diffs are 46/10). Even in the RC8 on 3S the HV 4.5 would need a small pinion (10T) and it may still thermal if used for track duty.
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Old 05-23-2008, 10:12 AM   #8
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Here is a thought, not sure though so you would need to figure it out.

Could it be possible with A123 cells? I am thinking at 3S setup would be 9.9V versus the 11.1V of a lipo 3S setup. And from what I hear, A123s are pretty durable.

Just a thought, may not work.
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Old 05-23-2008, 09:08 PM   #9
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I dunno about A123 cells as I have no experience with them. Personally, I think they are big and heavy.
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Old 05-25-2008, 08:42 AM   #10
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Default a123

In june there new size a123 which will fit our cars and buggy bat trays will come out 2 will fit in dans tray for a 13.2 4400 mah pack which will charge faster than 2 reg lipos I plan on using these when they come out over my 11.1 lipos vs 14.8 in my mm
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Old 05-26-2008, 08:50 AM   #11
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Personally, I have no experience with A123 cells, but I thought this was a very interesting read off the cheapbatterypacks.com website and THEIR opinion on A123 cells:

http://www.cheapbatterypacks.com/?pg...sid=1105910#42
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