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08-18-2008, 04:18 PM
| #1 |
| Newbie Join Date: Aug 2008 Location: dexter
Posts: 39
|  slow to fast
what is the fastest way how to make a rock crawler realy fast with low torque and high RPMs so i can swich frocm Crawler to of road fast truck in just a min.
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08-18-2008, 04:37 PM
| #2 |
| Debunking old stereotypes  Join Date: Feb 2006 Location: 1st and Amistad
Posts: 2,260
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Change gearing, but you're only going to get either torque or speed, not both at the same time.
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08-18-2008, 05:18 PM
| #3 | |
| Rock Crawler Join Date: Dec 2005 Location: Tulsa, Oklahoma
Posts: 857
| Quote:
http://holmeshobbies.com/product.php...&cat=17&page=1 Kamikaze's rig http://media.putfile.com/7tpuller | |
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08-18-2008, 06:01 PM
| #4 | |
| Quarry Creeper Join Date: May 2007 Location: Hilo
Posts: 430
| Quote:
X2 Pullers are great!!! Never stalled mine and if I wanted I could break stuff all day long. | |
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08-18-2008, 06:48 PM
| #5 |
| Quarry Creeper Join Date: May 2008 Location: Hartsville, SC
Posts: 461
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depending on what type of esc your using you could just have a spare motor with leads and deans already. It doesn't take but about ten min. to change out motors as long as you have it prewired and already have a pinion on it. but like many others some esc's limit your motor turns. (rooster crawler)27t
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08-18-2008, 06:53 PM
| #6 | |
| Debunking old stereotypes Join Date: Feb 2006 Location: 1st and Amistad
Posts: 2,260
| Quote:
Great set-ups, but I still doubt it's the speed he's looking for. I run a 4.5 Novak brushless in my offroad fast car. Last edited by freetimecrawler; 08-18-2008 at 06:55 PM. | |
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08-18-2008, 07:23 PM
| #7 |
| Quarry Creeper Join Date: Jul 2008 Location: Galt
Posts: 282
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Actually, couldn't you just use the combination of a Cobalt Puller and the R2 2-speed transmission? Isn't that like having a 2-speed transfer case in a 1:1 rig? |
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08-21-2008, 05:54 PM
| #8 | |
| Newbie Join Date: Aug 2008 Location: dexter
Posts: 39
| Quote:
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08-21-2008, 06:31 PM
| #9 | |
| RCC Addict Join Date: Aug 2005 Location: VARCOR
Posts: 1,826
| Quote:
But yes, if you want to try both, a JRH Cobalt is where it is at!!! | |
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08-21-2008, 06:52 PM
| #10 |
| Newbie Join Date: Aug 2008 Location: dexter
Posts: 39
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what type of gears should i have with the cobalt
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08-21-2008, 07:15 PM
| #11 |
| RCC Addict Join Date: Jan 2008 Location: Lake Michigan
Posts: 1,898
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Don't forget a second set of wheels/tires (no or little weight, stiffer foams or lower profile rubber). The Holmes video shows that thing nose diving most of the time, like the front was still weighted for crawling. |
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08-21-2008, 07:34 PM
| #12 |
| Quarry Creeper Join Date: Jul 2008 Location: Galt
Posts: 282
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I'm hoping to get some pretty good wheelspeed with a 14T pinion/87T spur on an AX10. That's the combination I'm going to try when I get the 7T installed on mine. If you do a search for "cobalt puller" on youtube, you'll see some videos that show both crawlability as well as wheelspeed. |
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08-22-2008, 06:58 AM
| #13 |
| Newbie Join Date: Aug 2008 Location: dexter
Posts: 39
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could i use this speed controller for the cobalt : http://www.rcslot.com/pc-radio-contr...CLRP80150.html |
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08-22-2008, 08:21 AM
| #14 | |
| Quarry Creeper Join Date: May 2007 Location: Hilo
Posts: 430
| Quote:
Its pretty much the most pricey motor you could buy. If you run wheels with no weights it would probably just flip over backwards unless you rig is real heavy. If you run it with a decent 3s lipo anyways. For esc I would honestly go with something alittle cheaper like a fxr or a sidewinder, you could even use a mamba max. There was a vid on youtube where there was a tuber that was blazing on some trails and pretty nice air. try youtubing 7t puller or something like that. Good luck!!  | |
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