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06-15-2009, 09:38 PM | #1 |
Y-Town Crawlers Join Date: Oct 2005 Location: Not Hesperia
Posts: 2,481
| Del Monte's Losi Comp Crawler
So I finally got a chance to post up my comp rig. I would guess that I have more time on my rig then anybody else here I've been following all the threads on here, but I finally had time to post up and add some tips and info. We'll start with the rig Specs: Losi Xcelorin with 21.5 Brushless and 16 tooth pinion 3S 1350 Lipo JR 8711 Steering servo Losi Mini-crawler dig servo Castle BEC Spektrum DX3R with SR3500 receiver Losi Aluminum C's, knuckles, and lockouts Losi Graphite Shock Arms Gearjelly in the diffs Heavy Setup 10oz. added in the front/45wt. shock oil 4oz. added in the rear/35wt. shock oil Light Setup 6oz. added in the front/35wt. shock oildf 2.5 added in the rear/30wt. shock oil I've been doing a lot of experimenting with tire weight and shock oil combinations lately, and this is what I've found works best. I've been using my heavy setup in high-traction areas (Grantie, slickrock, etc...) and using the lighter setup in slippery river rock areas. For extreme vert. climbs and big breakovers I've been using the heavy fronts with the light rears for some extra forward weight bias. I'm also running both of my upper links in the top holes on the chassis. I like having a little extra squat in the rear suspension on verticals, but if you drive with a little heavier throttle, you may want to move your rear upper links down to the center hole. Last edited by Del Monte; 06-15-2009 at 09:53 PM. |
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06-15-2009, 09:44 PM | #2 |
Pebble Pounder Join Date: Oct 2007 Location: BC Canada
Posts: 132
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Thank you for posting details on your comp rig. I will be keeping an eye on this thread. are you experiencing any sort of heat heat issues with your motor? |
06-15-2009, 09:52 PM | #3 |
Y-Town Crawlers Join Date: Oct 2005 Location: Not Hesperia
Posts: 2,481
| Performance MODS
I've been competing and doing quite well with my out-of-the-box Losi comp crawler, but there were a few things that I noticed that would really help its performance. First, I love the convenience of the battery tray, but I wanted the battey weight lower. My 3S lipos are pretty light, but for a comp rig you want as little sprung weight as possible. I cut out a lexan tray and moved my battery down to the upper links. Next, I wanted to outboard the rear shocks to help reduce body roll. I grabbed a long 4-40 bolt and an extra rod end, and moved the shock to the outside of the mount. This changes the shock angle and creates a bind at the upper shock mount, so I added 4 small washers behind the upper shock mount. So far these two mods made a big difference in the rig's crawling ability. Its pretty scary now I can't wait for my chance to put it up against the best in the world over the summer... |
06-15-2009, 09:59 PM | #4 | |
Y-Town Crawlers Join Date: Oct 2005 Location: Not Hesperia
Posts: 2,481
| Quote:
I think the 21.5/3S combo might be the perfect setup for this rig. I tested a 17.5 over the weekend, and it just ran a little too hot for my liking. I've ran both setups on 12-18 tooth pinions, and my favorite has been the 21.5 with a 15-17 tooth pinion. For my driving style, the 21.5 has plenty of punch, and I still have great low-end control. | |
06-15-2009, 10:01 PM | #5 |
Pebble Pounder Join Date: Apr 2008 Location: Long Beach Ca.
Posts: 120
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How about your foam setup Jake? Im just finishing up mine as we speak. Thanks Bob.
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06-15-2009, 10:01 PM | #6 |
Rock Crawler Join Date: Apr 2009 Location: NorCal
Posts: 529
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Thanks dude for the info,,,,sense all that is available to us is the 17.5 Ex motor what pinion do think would be best? Also I see that yyou cranked the ring down on the two front shocks how far is that and do you like it there? thanks,Mike |
06-15-2009, 10:09 PM | #7 | |
Y-Town Crawlers Join Date: Oct 2005 Location: Not Hesperia
Posts: 2,481
| Quote:
A 12-14 tooth pinion works best with the 17.5. I loved the wheelspeed with the bigger pinions, but it just didn't have the torque and low speed control. I don't have my rig with me, but the shocks are cranked down probably 1/4-3/8th" | |
06-15-2009, 10:21 PM | #8 |
Rock Crawler Join Date: Sep 2008 Location: Kennesaw
Posts: 630
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What kind of springs are those your using?
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06-15-2009, 10:29 PM | #9 |
Quarry Creeper Join Date: Oct 2008 Location: Madera
Posts: 325
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They look just like xxx. . 2me
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06-15-2009, 10:35 PM | #10 |
Rock Crawler Join Date: Sep 2008 Location: Kennesaw
Posts: 630
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06-15-2009, 10:39 PM | #11 | |
Rock Crawler Join Date: Nov 2008 Location: SoCal
Posts: 861
| Quote:
Do you know when the public will be able to buy the 21.5 brushless system? Thanks | |
06-15-2009, 11:06 PM | #12 |
Quarry Creeper Join Date: Jan 2009 Location: El Cajon San Diego
Posts: 417
| You saw those too. I think they might be the progressives that aren't out and may never be. Could also be the 1.6 gray or 1.4 gold. I'm pretty sure they are the progressives though. Jake, where did you get those upper shock mounts? And are you compressing the springs more the driver side to compensate for the weight imbalance? |
06-15-2009, 11:32 PM | #13 |
RCC Addict Join Date: Aug 2007 Location: Rohnert Park
Posts: 1,093
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Thanks for posting up the inof and pics, this will be a big help to everyone. Can you please discuss a little about your driving style with the LCC. How it differs from rigs you've driven in the past? |
06-15-2009, 11:53 PM | #14 |
Rock Crawler Join Date: Feb 2008 Location: Golden Corral getting Fat
Posts: 607
| Jake, where did you get those upper shock mounts? that is losi part number : LOSA1114 Graphite Shock Tower Arms |
06-16-2009, 12:02 AM | #15 |
Pebble Pounder Join Date: May 2008 Location: Kalispell Montana
Posts: 170
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06-16-2009, 12:24 AM | #16 |
Quarry Creeper Join Date: Oct 2008 Location: Madera
Posts: 325
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06-16-2009, 01:19 AM | #17 |
Like a boss... Join Date: Feb 2008 Location: NorCal
Posts: 1,008
| x2 please. I'd like to know too how you handle the brushless motor stall that happens when in a bind?
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06-16-2009, 05:23 AM | #18 |
RCC Addict Join Date: Nov 2008 Location: I don't think theres rocks in Florida
Posts: 1,228
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I know we are all happy to have a team driver doing a build. I will be watching, listening, and learning.
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06-16-2009, 06:33 AM | #19 |
Quarry Creeper Join Date: Jan 2009 Location: El Cajon San Diego
Posts: 417
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06-16-2009, 06:44 AM | #20 |
RCC Addict Join Date: Jul 2008 Location: Sin City
Posts: 1,332
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Jake the rig looks great. Hope you can bring it up here for one of our night comps this summer.
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