Kraton Kraton exb 6s with 1250kv gearing help please?

[Jonesrc8s]

I have a kraton exb 6s with max6 esc and spectrum 1250kv motor I want it geared for off road speed runs.I have a 44t spur gear in it and I'm planning on running 8s mostly on this setup.I just ordered a 28t pinion will the gearing be to much for my setup?I also have dual power hobby twister fans on the motor with stock motor fan mount.only want to run 8s like I said.Also don't worry about my diffs they will be just fine my hole exb is upgraded with vidavon and hot racing all 3 diffs are fully upgraded to aluminum.so please don't tell me about how hard it's going to be on my diffs guys just need to no about gearing will it be to much like I said it's going to be 28/44 thanks to all in advance!!! P.s my lipos are 120c thanks

 

[BashTillBroken]

If your going to be bashing 28 is too much, dial it down to maybe 19 to 21 for the pinion you’ll still be stupid fast though.

 

[Jonesrc8s]

If your going to be bashing 28 is too much, dial it down to maybe 19 to 21 for the pinion you’ll still be stupid fast though.

No not bashing bud I have to much money into it for all that offraod speed runs

If your going to be bashing 28 is too much, dial it down to maybe 19 to 21 for the pinion you’ll still be stupid fast though.

Offraod speed runs no jumping mainly speed runs and flat track no bashing?will it still be to tall iv already ordered the 28t that's why I'm asking its a light truck spose to be in 8s kraton so hopefully with it being light weight it won't be to much or should I use that gearing on 6s ???

 

[BashTillBroken]

I would go down to 25 for on road it’s going to be a lot fast than you think with that gears your probably looking at, at least 80 mph if you got the right tires and ride height

 

[Jonesrc8s]

I would go down to 25 for on road it’s going to be a lot7 fast than you think with that gears your probably looking at, at least 80 mph if you got the right tires and ride height

So would it be better running that 28t on 6s instead? Since every one say u have to run huge pinion I'm really trying to get around this so I can put the 28 in areDy paid for to use that's all lol

 

[dure16]

1250kv on 8S with 28/44 gearing is way too high for off road in a Kraton. That would theoretically put you over 100mph, and I don't think those kinds of speeds will be possible off road with that setup. You would need a bigger motor and ESC and even then you'd run into major problems with tires and controllability.

Which tires are you using? And what are your speed goals?

 

[Jonesrc8s]

1250kv on 8S with 28/44 gearing is way too high for off road in a Kraton. That would theoretically put you over 100mph, and I don't think those kinds of speeds will be possible off road with that setup. You would need a bigger motor and ESC and even then you'd run into major problems with tires and controllability.

Which tires are you using? And what are your speed goals?

I'm running beltted mx38 also how about that gearing on 6s then?

I'm running beltted mx38 also how about that gearing on 6s their it to much for 6s??

1250kv on 8S with 28/44 gearing is way too high for off road in a Kraton. That would theoretically put you over 100mph, and I don't think those kinds of speeds will be possible off road with that setup. You would need a bigger motor and ESC and even then you'd run into major problems with tires and controllability.

Which tires are you using? And what are your speed goals?

Atleast 70mph mx38 belted
How about 22/44 on 8s come on guys help me out here please I no someone no what their talking about out their.!!!!!
Since 28/44 is to much on 6s and 8s but every one say run a huge pinion on 6s what's a huge pinion to them then lol am I missing something guys help a brother out here.

 

[dure16]

I'm running beltted mx38 also how about that gearing on 6s then?


Atleast 70mph mx38 belted

6S would theoretically put you around 80mph.

If you're good with that speed, then you'd have better luck going after it with 8S since it'll keep amps/current lower. Approximately 22/44 gearing.

P.S. Those belted badlands are great for high speed bashing, but I'd be surprised if they held up to a lot of 80mph+ speed runs.

P.P.S. Your Max6 is a bashing ESC and doesn't perform too well for speed running. It can cut out under prolonged heavy load. An MMX8S or XLX2 may be a necessary purchase if you're serious about the speed running.

 

[Jonesrc8s]

6S would theoretically put you around 80mph.

If you're good with that speed, then you'd have better luck going after it with 8S since it'll keep amps/current lower. Approximately 22/44 gearing.

P.S. Those belted badlands are great for high speed bashing, but I'd be surprised if they held up to a lot of 80mph+ speed runs.

So tell me what should I go for with 8s and 44t spur I want atleast 70mph no jumping all straight running brother???help me out is 21/44 good whT would u do just for straight line offroad runs?

 

[dure16]

So tell me what should I go for with 8s and 44t spur I want atleast 70mph no jumping all straight running brother???help me out is 22/44 good whT would u do just for straight line offroad runs?

What would I do?

I would educate myself on gearing, amps, and voltage to determine a starting point. Then I would work my way up, perhaps starting around 60mph for off road, going up one pinion at a time until my system is too stressed and requires change.

Each setup and terrain is different and nobody knows what is best for you. You'll have to do some trial and error.

 

[Jonesrc8s]

What would I do?

I would educate myself on gearing, amps, and voltage to determine a starting point. Then I would work my way up, perhaps starting around 60mph for off road, going up one pinion at a time until my system is too stressed and requires change.

Each setup and terrain is different and nobody knows what is best for you. You'll have to do some trial and error.

20/44 it is then thanks bud for your help!!

 

[Frumba57]

22/44 it is then thanks bud for your help!!

I run a 160A/1250kv Firma system in my EXB K6S that I got out of my O8S. The EXB came with a 50T spur, I put a 46T on it paired with a 23T pinion. On the stock motor mount there isn't much room left to go bigger. The Kraton is stock otherwise. Double fans still struggle to keep it cool. But fast is a understatement, 70 plus in grass on 6S. Going to run it 6S and get familiar with it before I drop 8S. My .02

 

[Jonesrc8s]

I run a 160A/1250kv Firma system in my EXB K6S that I got out of my O8S. The EXB came with a 50T spur, I put a 46T on it paired with a 23T pinion. On the stock motor mount there isn't much room left to go bigger. The Kraton is stock otherwise. Double fans still struggle to keep it cool. But fast is a understatement, 70 plus in grass on 6S. Going to run it 6S and get familiar with it before I drop 8S. My .02

Thanks for your help bud and also thanks to all that helped.im going to be running 20/44 on 8s my kraton is fully upgraded down to the diff gears in it its maxed out with hot racing and vidavon its nothing else to upgrade lol I'm also running titanium drive shafts front back center also titanium piller balls and titanium hing pins oh almost forgot titanium turnbuckles front and back all titanium parts from scorched rc.with the gearing im going with should put me right around 80 mph even though I probably will never go that fast it just fells good knowing I have it in reserve if it's needed to pill off on someone in a close race lol.i want to give dure16 a special shot out thanks for making me hit the drawing board with my gearing and really take the time to study what I'm doing you all been great help and soon as get this running with my gearing I will update this forum thanks to all much love my arrma brothers....ManChildRC-Arrma Nation baby!!!!!Lesh get it🏎

 

[fozzy71]

Tires OD diameter?

 

[Jonesrc8s]

Tires OD diameter?

Their mx38 belted so 6.8in

 

[fozzy71]

Their mx38 belted so 6.8in

U R Geared way too high for off-road IMO. I don't even gear my on-road bashers for 90+. If you are bashing with big wheels in the grass and dirt I would gear down to the 60's to start.

Edit: I don't have an 8s rig yet so my suggestions are based on Arrma 6s Spektrum/

 

[Jonesrc8s]

Um no I'm not did you read what I went with ?it's now 20/44 that's not high at all for my sir up sorry dude.
Also that chart is wrong lol for on its 44t spur and 22t pinion also that's not 8s voltage 8s is 29.6 sir give or take a little spike on voltage I'll be right around 79-80 mph we're did you get them number from lol

 

[fozzy71]

21/44

Still too high for off-road IMO but as I said, I do not have 8s experience and spend most of my time on-road....

 

[Jonesrc8s]

I'll do mine this way and you do yours your way how about that...BTW 8s is 29.6 your over voltage
Also this is an offroad drag car I don't do jumping and that stuff I got near 2 grand in my car I wish I would bash it
Also just bc it reads 80mph do not mean it's going to do that speed even if it did I'm not.this will be good gearing for my rig also keeps Temps down with that gearing...I run 8s not 6s ppl run 22-23 in their 1650 motors on 8s so why would u really think it's to much for a 1250 kv lol

 

[fozzy71]

I'll do mine this way and you do yours your way how about that...BTW 8s is 29.6 your over voltage
Also this is an offroad drag car I don't do jumping and that stuff I got near 2 grand in my car I wish I would bash it
Also just bc it reads 80mph do not mean it's going to do that speed even if it did I'm not.this will be good gearing for my rig also keeps Temps down with that gearing...I run 8s not 6s ppl run 22-23 in their 1650 motors on 8s so why would u really think it's to much for a 1250 kv lol

2 mph difference... my calc had 8s selected... we r doing the same thing it would seem other than I chose 3.8v and u chose 3.7v for sag?