what is faster

[DreamMachine]

Is a twin 2200kv setup faster than a single 1717 or 2028?

The goal is 100mph in a savage

 

[trax de max]

twin brushless set ups aren't that good. and you'll need some good wheels. The savage is maybe a bit bulky to get high speeds.
But good luck in your quest.

 

[Non Crimen]

I think the dual motor set up would just be more torque.


Sent from my Pipboy-3000

 

[bgbdwlf2500]

Your best bet is the 1717. I've almost got my emaxx going with that motor. Twin 2200 kv is too much torque. I tried it with 6s on each esc..just too much torque the 2028 is way too big and not enough rpms. Ur gonna have a hard enough time getting the 1717 on a savage.

 

[2revo1maxx]

The 1717 has less rpm but more torque, so you'll have to gear it higher.
100 mph in a savage? That is a true DREAM machine.

 

[DreamMachine]

Well I'm at 73.1mph in a nitro savage thats single engine powered. I know how to go fast in the savage.

What I'm gathering is the 1717 would have more rpm and thus be able to propel me to 100 in terms which would be better than the 2028 and twin 2200kv?

I hit 60mph with 12/46 gearing center diff of course with the 2200kv motor on 6s and double belted proline bowties. There is no doubt i could hit 70 just by putting on my X0-1 wheels. Now the guy who 79mph in his flux was running the same motor and esc i am but using the flux tranny with 39t idler and 20/44t gearing with belted phaltlines. I want to use 25/46 gearing on 6s with the 2200kv motor and it has a speed of 116mph, theoretical of course

 

[Snook Man]

I’ll be the 1st to admit I know little about electric motors…But I do know you will need a splitter and canards on the front to keep it from taking flight.
The X0-1 without the splitter and canards will lift the front at around 80mph without the canards and it weighs 10.3 lbs rtr with good down force on the standard lid.

 

[DreamMachine]

See I get the aerodynamic part but you see these rustlers reaching 100 with nothing more that foam wheels, lead weights and a truggy style body. I read that once you cross 60mph aerodynamics starts to play a big role in top speed. Now this might have been 1:1 but I'm guessing 60-80mph is where the aerodynamic will start to help on an RC. To contradict that statement, the worlds fastest Baja doesn't run a body actually two different bajas with claims over 100 don't run bodies. If I can pull out a 70mph run without a body then maybe aerodynamics arent as important as one would think. Idk this is just speculation tho.

I just want to go fast

 

[2revo1maxx]

Well I'm at 73.1mph in a nitro savage thats single engine powered. I know how to go fast in the savage.

What I'm gathering is the 1717 would have more rpm and thus be able to propel me to 100 in terms which would be better than the 2028 and twin 2200kv?

The 1717 is a 1580 kv motor, if you run 6s it'll be 1580kv x 25.2 volts= 39,816 rpms.

The 2200 kv on 6s is 55,440 rpms. Like I said before the 1717 will have a lot more torque than 1 2200 motor, probably about the same as 1-1/2 of the 2200 kv motors. If you wanna go fast you can either run a 2200 with too much gear or run a 1717 with too much gearing. By too much I mean too high.

I'm gonna wager a guess here and say that either motor going 100 mph in a savage will have to be geared so high that they will overheat in a matter of 1-3 minutes.....but that is only a guess. My erbe is only geared to go about 55-60 mph, but if I geared it up to 75 mph it would burn.

The more I think about this the more I think you should go with twin 2200's and twin esc's......or a lot of heat sinks and fans.

---------- Post added at 7:08 PM ---------- Previous post was at 7:07 PM ----------

I wanna know more about your 73.1 mph nitro powered savage.

 

[joshman1204]

Why are you sticking with 6s? All the super hi speed brushless stuff that I have seen runs on 10-12s. I would assume to break 100 you will have much better luck running on higher voltage with the right motor/esc combo than over gearing the hell out of a 2200kv.

---------- Post added at 7:44 PM ---------- Previous post was at 7:41 PM ----------

Although I would assume you would have a hard time not only stuffing that much stuff in a savage platform but it would also probably rip the thing to shreds.

 

[Greywolf74]

It all boils down to gearing bro. You faastest set up is going to be a single 2200 on 6S unless you can run some gearing where your pinion is larger than your spur (or maybe close to a 1:1 ratio) in which case either the twin 2200 or maybe the 1717 would be your best bet depending on the gearing. tell me the most extreme gearing you can manage and I could probably help narrow it down some.

 

[joshman1204]

Why would you not run something higher than 6s?

 

[DreamMachine]

Well I have a plethora of pinions available right now, 10,12,20,25,26,27,28,28,29, and 30.

The twin 2200kv setup would be running combined 12s. This is what I have at the moment. The motor mounts have not been made yet.

 

[joshman1204]

I would stay away from running dual motors unless you just can't get to where you want with a single.

I saw a video on youtube of a a 1717 on 8s or 10s and it was insane. I would assume you could gear they hell out of a 1717 and run it on 8s and probably get pretty close to your goal.

 

[DreamMachine]

This is the entire build thread for my savage speed aka the dream machine

http://www.savage-central.com/modules.php?name=Forums&file=viewtopic&t=96702

---------- Post added at 8:59 PM ---------- Previous post was at 8:54 PM ----------

I would stay away from running dual motors unless you just can't get to where you want with a single.

I saw a video on youtube of a a 1717 on 8s or 10s and it was insane. I would assume you could gear they hell out of a 1717 and run it on 8s and probably get pretty close to your goal.

According to the gearing calc, the suggested top speed of one 2200kv motor on 6s with 25/46 gearing and X0-1 wheels is 116mph at 55,000rpm. Now based off what I know is that if one guy can reach 79 with a single 2200kv then a twin should have no problem reaching 100. All I need is 25% more power to do it. The same can be said about my nitro savage.

 

[joshman1204]

This is the entire build thread for my savage speed aka the dream machine

http://www.savage-central.com/modules.php?name=Forums&file=viewtopic&t=96702

---------- Post added at 8:59 PM ---------- Previous post was at 8:54 PM ----------



According to the gearing calc, the suggested top speed of one 2200kv motor on 6s with 25/46 gearing and X0-1 wheels is 116mph at 55,000rpm. Now based off what I know is that if one guy can reach 79 with a single 2200kv then a twin should have no problem reaching 100. All I need is 25% more power to do it. The same can be said about my nitro savage.

Adding a second motor doesn't increase the RPM's it just increases the torque. I dont see where adding a second electric motor really does anything to increase top speed. I guess it would allow you to run taller gearing but I dont think it will really make that much difference.

When I was looking into building a speed rig I was looking at going with a single motor and just running it on higher voltage. I will see if I can dig up some of the builds I bookmarked that were running on 8s. There were even a few running on 12s but they were on fully custom chassis and everything.

---------- Post added at 9:05 PM ---------- Previous post was at 9:04 PM ----------

Also I have no experience with this stuff just what I have read so take my input with a huge grain of salt

 

[DreamMachine]

Your correct when you say more torque means you can run taller gearing. This is a big reason why I can run 20/27 gearing on my nitro savage. The other key to the puzzle is the wheels. When I was running 20/30 with phaltlines the truck couldn't push it. So I had to keep running 20/36 which I still managed 60.9mph. When I switched to the X0-1 wheels it opened the door by leaps and bounds to what gearing I could use. I've spent the last 10months trying to break records with my nitro savage and I have learned a lot.

 

[Greywolf74]

If you could run 34T pinions on those 2200's and run a 34T or smaller spur youd have a beastly setup.

 

[DreamMachine]

Believe it or not I found a 35t spur for the vorza cd I have. Then I could grab some X0-1 34t pinions and it would be close.

The biggest fear I have with running electronics with such tall gearing is the chance of melt down. With nitro the motor mono tones to tell you it's to tall. Idk what BL would do or sound like.

 

[2revo1maxx]

Adding a second motor doesn't increase the RPM's it just increases the torque. I dont see where adding a second electric motor really does anything to increase top speed. I guess it would allow you to run taller gearing but I dont think it will really make that much difference.

When I was looking into building a speed rig I was looking at going with a single motor and just running it on higher voltage. I will see if I can dig up some of the builds I bookmarked that were running on 8s. There were even a few running on 12s but they were on fully custom chassis and everything.

---------- Post added at 9:05 PM ---------- Previous post was at 9:04 PM ----------

Also I have no experience with this stuff just what I have read so take my input with a huge grain of salt

Increased torque means more overall power per pound, which means he can run a higher ratio with less risk of a double meltdown.

Dream machine, by the looks of things I'd say this should be a build thread, not a question thread.

I am questioning the whole 25% more power theory though. I think to get from 79 mph to 100 you'll need a whole lot more than 25% more power.