04-01-2020, 10:15 AM | #2101 | |
I wanna be Dave Join Date: Oct 2010 Location: Caldwell ID.
Posts: 4,328
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
I have not found on the other hand a motor I like yet. 2600-2700kv and 550can size 5mm pinion, and sensored. Anything that's close, seems to be directly for crawlers, or much higher Kv. The Pro4Hd is really close, but the Kv values are off imo just a bit, loosing the top speed while gearing down. | |
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04-01-2020, 03:08 PM | #2102 | |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
I could be misunderstanding this...but, as I understand it, the ring & pinion gearing on the RR is a "faster" gearing than the BR's, thus a good party of why the RR uses a lower kV motor. So, what I'm thinking is this - would it be better/smarter to stick with the stock r&p gears, and get a motor with a kV rating that's closer to the stock motor...or swap the r&p gears for the RR r&p gears, and get a lower-kV motor. First, and I correct in my 'understanding' of the RR having "faster" r&p gearing? If so, then he's my latest ideas: 1) Stock r&p gears, Tekin Pro4 HD 3500kV, and stock pinion (to start...possibly up/down by 1 tooth). 2) Swap for the RR r&p gears, Tekin ROC412 HD 3100kV, and whatever tooth-count pinion would work best with this combo (which I could probably use a little help on determining a "starting point"). My thoughts on the second option are three-fold. First, that the RR r&p gears would put less strain on the motor, and transmission. Second, the lower-kV motor will afford greater torque, & quicker acceleration. And third, with a lower kV motor, it'll run cooler. I'm sure there are probably other benefits of running the lower kV motor. Thoughts? ~ More peace, love, laughter & kindness would make the world a MUCH better place | |
04-01-2020, 03:55 PM | #2103 |
RCC Addict Join Date: Feb 2016 Location: Santa Maria, CA
Posts: 1,751
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck
You've got the r&p ratios backwards. The RR is 42/12 (3.5:1) and the BR is 40/14 (2.85:1) so the stock baja rey gearing is considerably faster. The gear sets are interchangeable and I run the slower RR gears in my BR and have not had any r&p issues since (along with Exotek diff cups, SSD front bulkhead, metal concepts rear.) What is your aversion to spinning your motor faster? I generally shoot for a max of ~50k rpm (calculated rpm, it won't ever actually spool up that high once you consider losses through the drivetrain) for a given voltage which is around 3900kv (though anything in the 3100-4300kv would be fine) for a 3s that's hot off the charger, or 6000kv for a fully charged 2s, then gear down for the desired speed. A fast motor geared low will run smoother and cooler than a slow motor geared high, assuming both are geared for an identical top speed. The faster motor may be capable of drawing more peak amps, but the higher geared, slower motor will draw more average amps (lower speeds considered) which will make it run hotter. Minimum startup rpm on a fast vs slow motor from the same model line is generally very similar, so the fast motor geared way down will actually have a smoother, slower startup GROUND speed. My vote is to give the stock motor a try, but gear your pinion down (10t is a good starting point) for 3s. If it's too fast for your intended useage, switch to RR r&p's instead of a lower kv motor. I definitely wouldn't consider a lower kv for 2s use. |
04-01-2020, 05:23 PM | #2104 | |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
Touching on the 2S vs 3S matter, to start work, I'll be running only 2S. While I plan to give it plenty of outdoor use, it will have to start it's life as a 2S-only vehicle. I live in San Jose, CA, and there's not exactly a lot of outdoor places to run in. Thankfully, we do have an excellent indoor track at one of the LHSs), but only 2S is allowed. However, once I can afford a second motor (2-3 months), which would be for 3S-only use (read my previous posts for my 2-motor/pinion idea), then if have the option for running 2S indoors, and 3S outdoors. So...once again...I'm back to not knowing which motor to go with. You say "nothing higher than 4100kV, except that the only higher-kV options for the ROC412 HD are 3100kV (what I was looking at), and 4200kV. If I were to go back to considering the Pro4 HD, the choices are 3500kV & 4300kV, which, by your wording, would appear to be "worse" choices. Now, I could go back to what my original choice was - a Holmes Hobbies Puller Pro R 540-L V2, which is 4100kV, but can also hit up to 60K RPM. All of these choices are powerful, but also efficient, motors. The only other thing I can think of would be to go with an all-Castle combo, except I don't find any 550-can motors in the 3500-4100kV range. EDIT: I almost forgot...another party of the reason for replacing the motor is that I'll be replacing all electronics. Obviously, the underpowered stock servo needs to be replaced, but I'll also be replacing the Rx (I prefer to use my 7PX for all my vehicles), and the ESC (with Mamba X). In replacing 4 of the 4, might as well replace the fourth. Also, some brands of ESCs don't work with certain brands of receivers. I discovered this when I went to replace the receiver on my first Traxxas vehicle. Let's just say the Traxxas-branded ESC "doesn't communicate well with Futaba receivers". ~ More peace, love, laughter & kindness would make the world a MUCH better place Last edited by Panther6834; 04-01-2020 at 09:54 PM. | |
04-01-2020, 09:40 PM | #2105 | |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
Last edited by CaliCrawler; 04-01-2020 at 09:43 PM. | |
04-01-2020, 10:22 PM | #2106 |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck |
04-03-2020, 12:59 PM | #2107 |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck
Finally installed the P.E.R.S. Switch. Only on front though. Works perfect with the stock radio. https://youtu.be/AuVYJidPRzo |
04-03-2020, 01:36 PM | #2108 | |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
~ More peace, love, laughter & kindness would make the world a MUCH better place | |
04-03-2020, 03:18 PM | #2109 | |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
Forgot to mention, these are just your standard size LED strips (kind of...) in a Polyoxymethylene housing (I think it’s delrin?) Last edited by CaliCrawler; 04-03-2020 at 03:26 PM. | |
04-04-2020, 02:09 PM | #2110 | |
Pebble Pounder Join Date: Mar 2012 Location: Fort Collins
Posts: 173
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
Just get the NERS then u are covered either way and they are still tiny | |
04-04-2020, 02:11 PM | #2111 |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck |
04-04-2020, 11:44 PM | #2112 |
Pebble Pounder Join Date: Jan 2016 Location: Newbury Park
Posts: 146
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck
Has anyone found a spot to order that black rhino wheels alone...without the tires? I can only find the original BR wheels it seems.
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04-05-2020, 11:42 AM | #2113 |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck I haven’t seen any yet, actually thought that’s what I was getting when I ordered through my LHS, but no. I will sell you my old wheels and tires. You could dismount and reuse them. Only have about three packs in them.
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04-05-2020, 12:16 PM | #2114 |
Pebble Pounder Join Date: Jan 2016 Location: Newbury Park
Posts: 146
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Thanks for the offer, but not interested in dismounting, lol. I bought my raptor brand new a few weeks ago and sold the tires immediately (too much ballooning on 3s). I run the PL KO2s I thought I could get some axial methods to fit, but they don't (offset is about 1/8-1/4 inch too wide so the tires don't tuck. So back to the original BR Losi rims I go I guess. Oh well. Maybe they'll release them someday.
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04-05-2020, 12:26 PM | #2115 | |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
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04-05-2020, 01:54 PM | #2116 |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck
Quick question about front dual shocks. I figured out an easy way to add dampers to the front. Maybe? I’m just holding it in the photo with some pliers to show location. Would there be a disadvantage (besides the shocks being in a vulnerable location) to mounting them here with some standoffs to keep them away from the spring? I’m working on trying to mount them internally with metal concepts lower and RPM upper a arms. Trying to get a consensus on looks and functionality. I have already ordered the 100 mm king shocks from RC4WD (to match the 120 mm I installed as dampers in the rear). Here are pics with the proposed location.(These are 90 mm shocks in the picture and not the ones I will be using) Last edited by CaliCrawler; 04-05-2020 at 04:07 PM. |
04-05-2020, 05:39 PM | #2117 | |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
On a separate note, I'm finally on my way home from visiting family in Vegas, and will soon be able to stay installing the various upgrades that are awaiting me. Be safe, everyone...but still get out and "play". ~ More peace, love, laughter & kindness would make the world a MUCH better place | |
04-07-2020, 04:30 PM | #2118 |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck
Saw these on a recommendation from a post a few pages back. Pulled the trigger. Got here in about seven days! Not bad! A solid piece of Kit (damn I sound British now!) Much improved over the Losi aluminum arms. [Yes I realize I did have them installed upside down(the Losi alum. arm) lol, or did I? The one side looked too jagged to run on the bottom.] Had to use about 3 mm worth of shims on both arms to accommodate the narrow ball of the RC4WD shocks. I definitely feel improved rigidity right away from these I arms. Don’t even need to test to tell there will be a difference. Last edited by CaliCrawler; 04-07-2020 at 04:59 PM. |
04-07-2020, 06:55 PM | #2119 |
I wanna be Dave Join Date: Sep 2019 Location: US
Posts: 2,408
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote: ~ More peace, love, laughter & kindness would make the world a MUCH better place |
04-07-2020, 10:20 PM | #2120 | |
Pebble Pounder Join Date: Jun 2008 Location: Modesto
Posts: 158
| Re: Losi Baja Rey 1/10th 4WD RTR desert truck Quote:
My bearings have been holding up pretty well! That’s why I have held off so far. | |
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