10-01-2014, 09:09 PM | #1 |
Newbie Join Date: Sep 2014 Location: Australia
Posts: 3
| Gearing and top speed
Hi newbie here. Im currently building a 1/10 scale U4 of my soon to be built 1:1 ultra 4. Im wondering what top speed most people aim for and what sort of gearing they use to get there. I have a 4000kv hobby king motor that will be running on 3s so im just trying to work out what gearing to use. |
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10-01-2014, 09:22 PM | #2 |
Quarry Creeper Join Date: Mar 2013 Location: Feather river canyon
Posts: 487
| Re: Gearing and top speed
What transmission you gonna use? If it's a wraith I use 32p gears and my gearing is 58 spur and 15 pinion. I'm running a tekin pro4 4600kv.. |
10-01-2014, 10:19 PM | #3 |
Newbie Join Date: Sep 2014 Location: Australia
Posts: 3
| Re: Gearing and top speed
I am running a wraith transmission and im going to buy new gears as this was bought with out any gears. the axle ratio is approx 2:1 as well and running 2.2 maxxis treps. I was thinking a top speed of around 35mph would be about normal for a 2.2? |
10-02-2014, 11:48 AM | #4 |
RCC Addict Join Date: Aug 2013 Location: Missoula
Posts: 1,346
| Re: Gearing and top speed 35 in a wraith would be basically undriveable. 25 is hard to keep upright. I'd be surprised if many are going over 20 WFO.
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10-02-2014, 12:22 PM | #5 |
I wanna be Dave Join Date: Feb 2007 Location: BFE, NV
Posts: 2,324
| Re: Gearing and top speed
Yeah, my rig tops out at about 20 and I don't think I ever got to full throttle on the track.
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10-02-2014, 12:42 PM | #6 |
I wanna be Dave Join Date: Apr 2004 Location: SoCal
Posts: 5,027
| Re: Gearing and top speed
I agree a top speed of 35 would be way too much. With a 4000 on 3s you are going to want pretty low gears, both pinion/spur and in the axles.
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10-03-2014, 08:53 AM | #7 |
I wanna be Dave Join Date: Jan 2004 Location: Detroit
Posts: 3,583
| Re: Gearing and top speed |
10-03-2014, 09:15 AM | #8 |
Quarry Creeper Join Date: Mar 2013 Location: Feather river canyon
Posts: 487
| Re: Gearing and top speed
My wraith with the pro4 in it goes maybe 15-20.. Gear it for some torque... If you want blazing fast get a onroad ride..lol.. My 2wd mod buggy was clocked on the straight at renos traction raceway, at 28 mph...and I was flying..I thought it was faster but it is tenth scale.. |
10-06-2014, 05:11 PM | #9 |
Newbie Join Date: Sep 2014 Location: Australia
Posts: 3
| Re: Gearing and top speed
My 1:1 Is geared for a top speed of 110mph but i would need some bigger balls to drive it at that speed. I have been in one going 90mph and it was fast. So with revised gearing im looking at a theoretical top of 28mph. Thanks all for the input
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10-06-2014, 05:59 PM | #10 |
Quarry Creeper Join Date: Aug 2014 Location: San Diego
Posts: 260
| Re: Gearing and top speed
What would be considerable gearing for a brushed set up 19t motor. 48p gears.
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10-06-2014, 06:01 PM | #11 |
Quarry Creeper Join Date: Aug 2014 Location: San Diego
Posts: 260
| Re: Gearing and top speed
Currently is 80 spur. 21 pinion I think. It gets hot fast. So obviously gear the pinion down. But what's normal. Eventually I'll upgrade to 32p and brushless.
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10-06-2014, 07:44 PM | #12 |
Quarry Creeper Join Date: Mar 2013 Location: Feather river canyon
Posts: 487
| Re: Gearing and top speed
You could try dropping the spur gear as well, like a 76 or 78 with 22/24 pinion.
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10-07-2014, 11:48 AM | #13 |
Quarry Creeper Join Date: Aug 2014 Location: San Diego
Posts: 260
| Re: Gearing and top speed
From my understanding, wouldn't that make it go faster?
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10-07-2014, 05:12 PM | #14 |
Quarry Creeper Join Date: Mar 2013 Location: Feather river canyon
Posts: 487
| Re: Gearing and top speed
it would drop the rpm of the motor... it would still have good torque and maybe not as much top end, its some thing you might have to adjust to your liking..
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10-10-2014, 06:20 AM | #15 |
Quarry Creeper Join Date: May 2010 Location: Perth, Australia
Posts: 225
| Re: Gearing and top speed
any gearing suggestions on the ROC412 3100kv on 3S ?
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10-11-2014, 12:28 AM | #16 |
Quarry Creeper Join Date: Aug 2014 Location: San Diego
Posts: 260
| Re: Gearing and top speed
I just put a 5000kv brushless in my wraith. I'm using 54/14 32p on 2s. Are you using 32p or 48p?
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10-11-2014, 09:42 AM | #17 |
Quarry Creeper Join Date: Mar 2013 Location: Feather river canyon
Posts: 487
| Re: Gearing and top speed |
10-11-2014, 07:46 PM | #18 |
RCC Addict Join Date: Aug 2013 Location: Missoula
Posts: 1,346
| Re: Gearing and top speed |
10-11-2014, 10:16 PM | #19 |
Pebble Pounder Join Date: Jul 2013 Location: San Bernardino
Posts: 112
| Re: Gearing and top speed |
10-12-2014, 01:03 AM | #20 |
Quarry Creeper Join Date: Aug 2014 Location: San Diego
Posts: 260
| Re: Gearing and top speed
I don't know what stock gearing is. I just used what I had laying around to make it 32p gears.
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