Ultimate Capra Over Drive Test

Lots to absorb from this one, in the end, its what suits your truck and your driving style the best, below are links to the parts and pieces used in this video
Ultimate Calculations from George Nada
Axle diff gears 8/30 = 3.75:1
Ring and pinion O.D. 8/27 = 3.38:1
Portal gears 12/23 = 1.92:1
TGH O.D. portal gears 15/20 = 1.33:1
Hot Racing O.D. Portal gears 13/22 = 1.69:1
Total axle ratio 7.2:1
TGH Portal overdriven axle ratio 5:1
H.R. Portal overdriven axle ratio 6.35:1
Ring and pinion overdriven axle ratio 6.48:1
Both (TGH) overdriven axle ratio 4.49:1
Both (H.R.) overdriven axle ratio 5.71:1
TGH portal OD percentage 36%
HR portal OD percentage 13%
Ring and pinion OD percentage 10.5%
Both (TGH) OD percentage 46%
Both (HR) OD percentage 23%
TGH OD front, ring and pinion OD rear total OD percentage 26%
HR OD front, ring and pinion OD rear total OD percentage 2%
Internal transmission gears 30/54 = 1.8:1
Ratio before pinion selection 12.96:1
Spur 34t pinion 17t = 2:1 total= 25.92:1
34/16= 2.13;1 = 27.6:1
34/15= 2.27 = 29.42:1
34/14 = 2.43:1 = 31.49:1
34/13= 2.62:1 = 33.96:1
34/12= 2.83:1 = 36.59:1
34/11 = 3.09:1 = 40.05:1
34/10 = 3.4:1 = 44.06:1
34/9= 3.78:1 = 48.99:1
Team Garage Hack Gears
supershafty.co...
Hot Racing Gears
Amazon
Ebay rover.ebay.com...
Boom Racing Gears at Dixieland RC
dixielandrc.ec...
Axial Capra Kit
Amazon amzn.to/39EmX48
Ebay rover.ebay.com...
Ottsix KLR M Tires
www.ottsix.com...
Ottsix Capone Wheels
www.ottsix.com...
Reefs 444 Servo
reefsrc.com/st...
Reefs Micro 99
reefsrc.com/st...
Hacked 8ch GT3c by me
[e-mail]

[@mickd8188]

I'd just like to also thank you for the time you would have put into this footage mate... Big task, Big thank you.. I was suprised to see how much forward motion was lost on that climb test as the overdrive ratio got bigger.. certainly wasn't the "grab and pull up" effect we are all led to believe, it was almost like a power bleed to front axle through traction loss. No doubt it increased turning radius though. I know what choice I'm making.. Cheers mate👍

[@CRAZYBUILD349]

hey mick do you have dig in your capra?

[@mickd8188]

@zilla-green yeah mate, stock trans but using a Power HD tr4 servo with a fixed servo horn so dig works a bit better, pulls it in and out reasonably confidently. Cheers mate 👍

[@dirtrider88]

8:45 literally over a car width wider than stock at 7:39. really appreciate the time you took to swap out all those gears.

[@Jeffro250]

I was completely on the fence about putting overdrive in my Capra and I think I'm just going to focus on making my dig 100% functional instead of messing with overdrive. I don't really have any issues with steering other than wanting an occasional tighter turn, which dig will offer. The decreased battery life, increased stress and wear on tires and other driveline components don't seem worth the minimal advantages with this rig. REALLY appreciate the time and effort you put into making this video--keep em coming!

[@douglaselliott8298]

After your recommending I install a front overdrive now that I disabled the DIG in my RTR Capra I felt it only right to revisit this video. Learning that an overdrive WILL shorten my battery's run time I have decided that it is NOT a modification I will make to my Capra.

[@StefanKaizur]

I had the tgh od gears but had issues getting "bound up" when trying to reverse up very steep inclines. It drove forward fine... Some real smart person told me to take em out and try it and sure enough the fronts were pushing the rears into the climb before they had a chance to spin. And a few other people in the capra page on fb had the same issue. Thanks again!

[@ExocagedRC]

Yeah man. After I finished that video I remembered that but was out of daylight to go back out there and try it. I was at a comp today and one guy said it did it to his and another said it was fine. I guess it’s a toss up. I have them in Optimus 3 so when I get to drive that I’ll make sure to get whatever happens on video.

[@StefanKaizur]

@@ExocagedRC maybe it has to do with motor torque. I put the 11t pinion and put 1.9s instead of the 14t and 2.2s and it still does it but it makes it further.

[@s1096cm2]

resurrecting an old video but damn this is good! I have the 4ws Capra and have about 12%od in it right now and fell that I lost performance so I ordered some 25% and haven't even received them yet when I seen this video. I'm pretty sure I wasted my moneys. I bet going back to stock and perfecting my use of dig will fix my complaints. very good video thanks for doing this. wish I had seen it 2 days ago. lol!!

[@whitsrcleftovers2707]

Thanks for all the work and showing us this. As someone else and you said, the whole overdrive for climbing we were told, seems to be a bit if a myth. Which after watching this makes sense. Sure the front is spinning faster and pulling, but now it's trying to "drag" itself up hill. Be like putting the dig system in full lock and then climbing. Not quite, but that should paint a nice picture. Lol.

[@dirtrider88]

something i learned a little while ago, you can buy under drive ring and pinion to put in the rear to achieve front overdrive since the capra is geared so tall. idk if theres underdrive portal gears you can put in the rear but that would be nice also.

[@ExocagedRC]

Yep. I’m not sure if we had the underdrive options at the time this video was made.

[@RandyChamberlin]

I bought the TGH portal OD gears. After this video, I'll know that when I go trailing if I do with the Capra to switch to stock gears. Comp and I'll go OD. I did not realize the TGH was that high geared. Which will be great for comps. Tx for the comparison

[@Houleigan]

Awesome! This saves everybody else some time and effort! Thanks for sharing!

[@williamhansbrough5465]

Love these kind of videos that you do doing all the work for me lol thanks for all your hard work keep it going

[@rickboyster8014]

Greatly appreciate the time you put into helping out the general crawler. This was a huge task and I thank you for your time and help with everything. Thanks bud

[@puffyelvis5895]

Truly outstanding video. This content is awesome and your effort in putting this together clearly comes through

[@CRAZYBUILD349]

that was a lot of work bro, thanks, your right, with dig ,I cant see changing the gear,great editing,and outstanding information,🚙🛻keep crawling!!!!

[@tougetime8509]

Never got why people like to overdrive personally. Granted I'm more into trail running than competition but the only benefit I see is a slightly better turning circle. Other than that you're literally giving up traction everywhere as the gearing has no choice but to force one end to slip. You could see it best on the side hill, With the overdrive the front end was losing traction trying to drag the rear along and started walking down the hill. Could also see it a bit in the steep rocky climb, Stock gears walked straight up while the more overdriven ones scratched around for traction as they were trying to climb at different speeds. Better to have all 4 wheels turning at the same speed and let them work together rather than fighting each other. That's just my opinion though. Would be interesting to see a comparison of overdriven vs stock on something like the kicker ramp you used on some of your tire tests, Would be a good way to see how much traction is given up from the forced tire slip where little differences in line etc. won't play into it.

[@ExocagedRC]

I’ve done OD comparison videos before. In competition turning and maneuverability is everything. Like you said in turns it helps and that’s the benefit. I’ve never really seen the OD help on a climb, now the dig absolutely can work to get the front to pull down and then drive out. When I do trails I take the OD out, it’s inefficient and makes things hot due to the constant bind. So comps yes, trail no on OD for me

[@alphamale1568]

Thanks for doing the tests. I know it takes quite a bit of time and effort to show this info. What I'd really like to see is a climb that the Capra cannot make in stock form but can make with overdrive. Otherwise, I think I will stick to my view that overdrive is not really a benefit with this particular truck.

[@1970scout800]

I run 12% overdrive in my element and it seems like the perfect amount in my opinion.

[@luatngo5408]

You’re my favorite RC channel

[@68rockcrawler]

Very well done video! Editing all of the clips of the exact same section together to see the head to head to head comparison was great!

[@Memeteam903]

Thank you for taking the time to do this.

[@richhahn7852]

Thank you for all the work with this video, it was very helpful

[@ExocagedRC]

You're very welcome!

[@atomico6666]

Thanks a lot. The clearest channel about rc on YT. 👍

[@paulclancy2404]

Idk like you said ultimately dig 100 percent , an don't go with crazy ratio you dont notice

[@JMHZ2401]

I feel adding overdrive (to a extent) makes it more efficient. I say this because the rear wheels won't be pushing the front. When you get to there point that the front us dragging the rear it's too much.

[@kenskens69]

Thanks for the info , Im using 55T and a 10p it work good sow far , 2.2 tires and i have the Dig set

[@mikearmstrong6885]

Excellent and very informative objective videos - many thanks! I'm curious to know how the carbon fiber body panels are holding up? They look awesome, however I'm concerned about them getting scratched and looking all beat up...

[@bacon9896]

Amazing video, thx for all the wrenching.

[@PaulRawlins2]

Nice breakdown! Bit random, but do you know of any OD/UD gears for the portals on the Gen8s? I have the 20% Treal OD ring and pinion up front, but that really only equates to about 10% at the wheels - after the reduction in the portals. I'd like to get more OD up front by regearing the portals, if possible.

[@ExocagedRC]

I don’t think there are any portal options for it. 10% is good for trail work. I’m not sure if anyone is making lower gears you put in the back or not.

[@PaulRawlins2]

@@ExocagedRC Hmm... I've got around 20% up front on my SCX10 II trail rig - just makes me jealous when I drive my Gen8s. LOL Redcat does sell a "UD" gear... but it's really an OD gear. Think they're still figuring things out. ;)

[@kelvinchanyikyee5714]

thank you for this content.

[@just_inolredneck8319]

Now would u actually change anything now about the o/d? From the time the video have been made? Especially after the vfd?

[@traildevil67]

One set-up i've seen a few guys doing is either set of OD portal gears front, stock R&P, but to bring down the massive OD they are also doing the R&P OD rear. Could you give that a try?

[@mbtec1]

Great information thanks

[@barajastony0]

With all that over drive what would be the best turn motor?

[@ExocagedRC]

Well I’d go with a 16t Crawlmaster Torquemaster or the expert version

[@Crash..Bash..RC_]

Whats good overdrive for trail use?

[@-Ola-.]

I think you forgot some of the benefits of OD, for example less torque twist in difficult situations..

[@ExocagedRC]

I can’t possibly see how this could help with that.

[@-Ola-.]

@@ExocagedRC it does. It streches and compresses the suspension.

[@nexus7138]

@@-Ola-. For torque twist the rear UD helps the most. Front OD have minimal effect on rear torque twist. (i tested this with axial bomber and trx4)

[@robertellis7831]

Here’s a dumb idea. Put the tgh gears in front and the HR gears in rear. Should give more wheel speed and still keep a little overdrive.

[@DavidRamirez-eo1nf]

I'm running TGH OD in the front with ring and pinion OD in the rear, 26% total overdrive. Similar idea.

[@ExocagedRC]

Yes I do feel there are options with all these gears and maybe even mix them up and still have wheel speed, a slight OD and great drive ability with an older scx style trans. Lots of options here.

[@vwagon5566]

:It's late but why the SCX transmission.? Capra not proven transmission? Respectfully...

[@ExocagedRC]

Bill Malanca this has the Capra transmission, it has the dig but this was about OD and how it handles certain situations. The dig feature is the ultimate OD without a doubt.

[@aboarder21]

I was looking to get a Capra after seeing all the videos ended putting a dig in my wraith. A lot cheaper and kept me out of trouble with the wife. But I stumbled into a super cheap used vaterra twin hammers. I Did the upright shock, battery upfront, 1.9 hyrax and it’s been crawling lines on my crawler course my wraith, bomber, scx10 can’t crawl. I’ve read a lot on GCM’s and bilinvic twin hammer builds who has some amazing builds. They both said how great they were. And know I see. Have you thought of building one or testing one on exoplex. Thanks again for the great content

[@darrinpennington]

Well crap, now I feel like I wasted $30 on od gears Great video though. I like the not so scientific experiments. Much like the guy on project farm channel. Real world experiments

[@jeeplivion]

Great comparison

[@KTMcaptain]

Are there any under drive gears? Capra gearing is already too high with 11t pinion.

[@ExocagedRC]

No under drive gears are available. You can get a 9t safely with either a Vitavon or Treal trans case, some have posted 9t with the stock cases but I haven’t tried that.

[@KTMcaptain]

Exocaged RC those cases are kinda pricey but might be my only choice.

[@lonewolfrcs1331]

how much would you charge me to print that spacer for the gen8

[@geoffkidd6332]

What steering links are you using on the capra?

[@woodrowshort4685]

Have you tried Trx4 axles on the Capra, looking at buying one and throwing my spare Trx4 axles on it for comps

[@rickboyster8014]

I have a Capra cage, skid and panels for sale if you are interested.

[@user-nk4ot4zh9o]

Why are you looking for faster?

[@WheelinMT406]

Can you run over drive gears in both axles? Is there a benefit to that?

[@jeeplivion]

This is what I want to know. I think just OD both at the same rate would make more sense to me

[@johnunderhill6672]

Wow ... Very Cool Vid Brother! The time ya spend for us... THANK YOU! ~(;+}>

[@WayneMiller1110]

It would handle a lot better if you had rear steering

[@gordonirf]

It seams to me the capra comes with a bit of a fast motor stock. Yet everyone talks about overdriving the front. Why is under driving the rear not talked about? It seams to me that might be more of a benefit. Im more in the 1:1 world and that is more common. Gearing lower to achieve your desired crawl speed.

[@ExocagedRC]

Currently there are no options to gear the axles down any. I wish there was.

[@nexus7138]

Only OD gears at the moment. If there is someday a UD gears then it will be the best option.

[@heribertoreyes7782]

Thansth👍👍👍👍👍👍👍👍👍👍👍👍

[@Einfach_der_geilste]

Pls give me UNDERDIVE gears

[@ExocagedRC]

I think you can use the 10.2 Underdrive gears from vanquish

[@Einfach_der_geilste]

@@ExocagedRC thanks that would be nice in terms of reducing torque twist and making it better to controll at low speed

[@DirectX3]

If you can stay stock, stay stock. Modification most of time for show off only.

[@chevyon37s]

So wrong. Bring a stock Capra and run it against a properly modified capra…. That stock one will be flipped over on many obstacles where the modified one goes up without trouble.

[@alexmabie4485]

Just take out the rear driveshaft at this point. Hold up, Front wheel drive with open rear diff.