Kronos XTR Rocket RX 4292 1780KV Motor -Quest 4 Quickness

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AngrySection8 said:
I'm excited to see some times! One of these days I'll have to mess with the 0-60 stuff, all I've ever used my gnss for is top speed, I'm sure my asuga could post some very impressive times but I know first hand I could never match your previous times posted with a truck, my finger doesn't move with that much precision!
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In theory, lighter rigs like buggies should be faster 0-60 than trucks/truggies. However, it's all about traction. Longer wheelbase helps too.

Too eager off the line - wheelie and consequently loss of traction. To cautious, no wheelie but slow. Not enough traction - wheelspin.

If weather conditions are sub-optimal, I'm going to warm my Jetko tyres before each run and get them sticky.

Launch control is not something I use, or gyro, so it's all about progressive feeding in of throttle over that first .25 of a second. Electronic aids would definitely be a huge advantage, but would take the finesse away from the driving.

Having authoritative steering, good centering etc helps you focus on what's needed.

Going down this particular avenue, what makes for a 200mph car doesn't work for a great 0-60 time. Having a car that's awesome at 0-60 makes for a fun drive. 😝😎🤞

Pinions are on the way! 😁
 
Suspension, raise the rear and lower the front and it should give a more stable launch (less wheelies) (y)

You know, my XTR has Max6/4082 1720kv in it, funny thing is I can't even remember what pinion is on it, even my build thread doesn't know :ROFLMAO::ROFLMAO: I'll go count teeth sometime this week and will report back.
 
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Pinions have arrived! Yay. And a strange light has appeared in the sky. I think this is sometimes referred to as - 'the sun'! 😝🤘

I figured it would be less likely to need anything lower than 13 teeth, so I've got - 12, 14, 15, 16 and 17 to be getting on with.

For comparison reasons, I'm sticking with 13 teeth to compare the new motor with the Kuron 825.

Once that has been done, we'll see what happens with different ratios. 🙏🤞

As a side note, the Graphene battery is taking a significantly greater charge than the Gens.

Weather isn't going to be set as fine all day here in Wales, so I need to get a wiggle on....
 
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Well within 30 mins of writing my earlier post, it was good-old, traditional, Welsh 'liquid sunshine'.

FFS.

So, by the time it stopped and dried a little, time was getting on.

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The surface was wet and in places there were puddles. That being said, the limiting factor on this run was the 1780kv motor. The gearing left at 13 teeth and the first wet run was...55mph.

After a couple of passes, using the Graphene battery, I got the following:

Screenshot_20231110-153239.png


In fairness, considering the number of passes I was doing - the motor was barely getting hand-warm.

Realising that it was under-geared even for a 0-60mph run, today's speed runs were a non starter. 🙄🤣

So, rather than faff about gearing up to a 15tooth pinion, I decided to do a spot of onboard 4K footage, filming massive power-slides and lighting up the tyres at will. Basically hooning around.

Sensible speed runs will have to wait til next time. 😁🤘

Early indicators are that this motor will not be getting massively hot like the Kuron 825. Not until I gear it up to the moon...😝
 
Horatio said:
Weather isn't going to be set as fine all day here in Wales, so I need to get a wiggle on....
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Was rather nice over in Bath, sadly though the tarmac track was wet and slippery, and have me a proper "straight to the scene of the accident" moment! Oh how we laughed 😂
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The video is excellent - shell/sky/grass/sky/grass/sky as it got flung across the grass.
Lost my nerve after that, so over to the BMX for jumps until it went dark.
 
Jeffwazz said:
Was rather nice over in Bath, sadly though the tarmac track was wet and slippery, and have me a proper "straight to the scene of the accident" moment! Oh how we laughed 😂
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The video is excellent - shell/sky/grass/sky/grass/sky as it got flung across the grass.
Lost my nerve after that, so over to the BMX for jumps until it went dark.
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It's been nice at times today. Typically, it was at it's best half an hour before I finished work. 🤣

I'm rendering a video right now, but there aren't any accidents. Off camera, I did hit a kerb, but it didn't break anything! 😅 To be fair, I came mighty close to clipping it in the video.

Overall, I'm impressed with the Rocket 4292 1780KV. It stayed totally cool throughout. It's going to be quick when it's geared up.

Will it be quicker than the Kuron 825 though?
 
KnowAir said:
I have both, haven't noticed a difference. However, neither has ever been in the same rig. If I weren't so lazy I'd do a comparison with everything being equal. Actually would be more trouble than worth to me. The BLX has 4mm bullets, Kuron 6.5mm..plus I have no data logging equipment (or desire).
I know everyone says the TC system is faster, IDK, hard to verify honestly. TC rigs run a different gear ratio also, I suspect that has more to do with it. Both systems have been pretty much flawless though.
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Well Razor did a video comparison on his YouTube channel and states that no other 'stock' electronics that he's used is as fast.

I got the Kuron 825 with a completely open mind, cooked it, abused it - then achieved 64mph. I don't own anything else similar to compare it to, so I'm relying on people like yourself to get some objectivity.

What I can say - in terms of speed runs and 0-60mph - I'm not seeing anyone posting times anything like the Kuron 825 in the Kronos. Several people have stated the internal transmission ratios are different between the Kraton vs Kronos. 13/43 vs 10/43.

I'm not satisfied that this is the reason for the performance difference between the systems. There's a thread on the Arrma forum where a Kraton owner replaced the stock Arrma electronics with Corally Kuron/Torox and found an extra 4mph.

Where did it come from? 🤔

The Kuron 825 2050KV - on stock gearing - is 7mph faster than the Rocket 4292 1780KV on 6S.

Now it's time to experiment with gearing and get the Rocket into the 'zone'. At the moment it's not exactly stressed - barely getting warm. Well within the 130°C max stated in the manual.
 
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All of Corally's ESC are rebranded Hobbywings with special firmware exclusive to Corally, I used to have a LHS that specialised in Corally stuff and this is what they told me..👍🏼 there are no RTR's on sale that are faster than Corally's in my opinion.!!
I owned the below esc in the past and it was absolutely nuts, 160A and its footprint was tiny, check out its physical dimensions..!!
https://www.cmldistribution.co.uk/p...s-160-racing-factory-2-3s-esc-160a-black-gold
 
BashingBrian said:
All of Corally's ESC are rebranded Hobbywings with special firmware exclusive to Corally, I used to have a LHS that specialised in Corally stuff and this is what they told me..👍🏼 there are no RTR's on sale that are faster than Corally's in my opinion.!!
I owned the below esc in the past and it was absolutely nuts, 160A and its footprint was tiny, check out its physical dimensions..!!
https://www.cmldistribution.co.uk/p...s-160-racing-factory-2-3s-esc-160a-black-gold
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They certainly made super quick brushed motors. Their 19 turn spec motors were brilliant. 🤩 I used Reedy and Corally motors to good effect back in the day. 😊
 
After reviewing the onboard video, I noticed a vibration from the front left wheel. Apparently, that wheel was no longer balanced because one of the self-adhesive lead weights had fallen off.

On checking the other wheels, I replaced all the weights with these:

Screenshot_20230604_215413_com.ebay.mobile_edit_243503313458676.jpg


Much better. They come in strips of 2.5g per weight,12 per strip.

Out of balance wheels will lose mph. These Saint gobain weights ain't coming off.
 
Horatio said:
Well Razor did a video comparison on his YouTube channel and states that no other 'stock' electronics that he's used is as fast.

I got the Kuron 825 with a completely open mind, cooked it, abused it - then achieved 64mph. I don't own anything else similar to compare it to, so I'm relying on people like yourself to get some objectivity.

What I can say - in terms of speed runs and 0-60mph - I'm not seeing anyone posting times anything like the Kuron 825 in the Kronos. Several people have stated the internal transmission ratios are different between the Kraton vs Kronos. 13/43 vs 10/43.

I'm not satisfied that this is the reason for the performance difference between the systems. There's a thread on the Arrma forum where a Kraton owner replaced the stock Arrma electronics with Corally Kuron/Torox and found an extra 4mph.

Where did it come from? 🤔

The Kuron 825 2050KV - on stock gearing - is 7mph faster than the Rocket 4292 1780KV on 6S.

Now it's time to experiment with gearing and get the Rocket into the 'zone'. At the moment it's not exactly stressed - barely getting warm. Well within the 130°C max stated in the manual.
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Yeah, IDK where the actual magic is.. I feel the esc and gear ratio is where the acceleration comes from, but the extra 4mph top end? Not sure. I will say, the Torox esc is the only one I've had routinely hit thermal shutdown.. I figure it must have some really aggressive programming in it? I'm about as low tech as anyone in this regard so, IDK. I just swapped a 4092 1650kv out and Kuron 825 into my Kraton XL. While the Kuron isn't as powerful, it's not "missing" by much..the Kraton is still plenty fast enough with the Kuron. I just got tired of shredding tires and was trying to lighten things up a bit.
Funny, my brother refuses to run 6s in his rtr Kronos, too uncontrollable he says, I ran 4s for the longest time in mine, then recently switched to 6s, I was hoping for cooler temps and longer run time, which seems to be working for the motor. I was running 16 or 17t pinion on 4s with truggy tires. After switching to 6s, the esc kept thermalling on me. 13t seems to be the most it'll take on 6s for me with TC electronics. Otherwise I cant even get through a 5200mah pack without letting the esc cool. I have 2 TC 6s combos I bought from JRC at different times, not sure what they were out of but one has a cap pack, the other does not. The one that thermals on me is without. I have the in the wrong rigs TBH, cuz the one with cap pack is installed in an ET48 running 4s exclusively with a Ten Shock 2200kv 4274. I did have a Kuron 825 in it but feel the Ten Shock pulls harder..easily my favorite motor.
 
BashingBrian said:
All of Corally's ESC are rebranded Hobbywings with special firmware exclusive to Corally, I used to have a LHS that specialised in Corally stuff and this is what they told me..👍🏼 there are no RTR's on sale that are faster than Corally's in my opinion.!!
I owned the below esc in the past and it was absolutely nuts, 160A and its footprint was tiny, check out its physical dimensions..!!
https://www.cmldistribution.co.uk/p...s-160-racing-factory-2-3s-esc-160a-black-gold
Click to expand...
I was eyeing one of these TC pro esc's a while back, the specs are incredible, much more adjustable than I'd ever use but, for the money, amazing. I didn't buy one, but definitely interested in them.
 
KnowAir said:
Yeah, IDK where the actual magic is.. I feel the esc and gear ratio is where the acceleration comes from, but the extra 4mph top end? Not sure. I will say, the Torox esc is the only one I've had routinely hit thermal shutdown.. I figure it must have some really aggressive programming in it? I'm about as low tech as anyone in this regard so, IDK. I just swapped a 4092 1650kv out and Kuron 825 into my Kraton XL. While the Kuron isn't as powerful, it's not "missing" by much..the Kraton is still plenty fast enough with the Kuron. I just got tired of shredding tires and was trying to lighten things up a bit.
Funny, my brother refuses to run 6s in his rtr Kronos, too uncontrollable he says, I ran 4s for the longest time in mine, then recently switched to 6s, I was hoping for cooler temps and longer run time, which seems to be working for the motor. I was running 16 or 17t pinion on 4s with truggy tires. After switching to 6s, the esc kept thermalling on me. 13t seems to be the most it'll take on 6s for me with TC electronics. Otherwise I cant even get through a 5200mah pack without letting the esc cool. I have 2 TC 6s combos I bought from JRC at different times, not sure what they were out of but one has a cap pack, the other does not. The one that thermals on me is without. I have the in the wrong rigs TBH, cuz the one with cap pack is installed in an ET48 running 4s exclusively with a Ten Shock 2200kv 4274. I did have a Kuron 825 in it but feel the Ten Shock pulls harder..easily my favorite motor.
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Awesome response and detailed account. My Torox came with a significant cap pack and so far it has been fine on 6S - sure the motor has been hot (prior to getting dual fans) but the ESC has been fine. I think. No shut downs and no magic smoke, releasing the inner Corally pixies, so we're still good.
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13/50 and 13/52 is recommended with the Torox/Kuron on 6S. So basically 11, 12, 13 tooth pinions only.

I think that the 4292 will be OK to gear up, given that it's barely getting warm on 13/52. I'm going to hit it with 15/52 & 16/52 and see what happens next. It was difficult for me to tell if it was rapid getting to 57mph Vs the Kuron 825.

Either way, it was great fun and very drivable - given the space I had to use. Not what you'd want in a smaller area unless you want to take the rig home in bin bags! 🤣

When I can be bothered, I'm also going to see how the Kuron 825 does on 12/52 for 0-60mph runs. I'm confident it will still hit 60mph on that gearing on 6S.

The Kronos XTR on stock tyres on tarmac and 6S is a handful, I'm not going to lie. It's about as subtle as a broken jaw. Ballooning tyres, wheelies, and just a general frenetic urgency make this rig feel like it's constantly on the verge of an accident with something solid.

This is why I fit the belted Jetko Supersonic tyres for tarmac use. They're heavier and much more controllable. When it's warm/dry at least. Sadly when it's cold, they don't get sticky enough and aren't progressive when they let go. The best you can do is catch the resulting pirouettes! 🤣 As amply demonstrated in the video. But it's fun as hell drifting at 30, 40 mph.

Off road on 6S, on stock tyres - on grass/dirt, I actually really like it. It hooks up well and handles very similar to a race Truggy - it's just that bit heavier. I've used the analogy before - if the XT8 was a scalpel, the XTR is a chainsaw. 😝
 
Horatio said:
The Kronos XTR on stock tyres on tarmac and 6S is a handful, I'm not going to lie. It's about as subtle as a broken jaw. Ballooning tyres, wheelies, and just a general frenetic urgency make this rig feel like it's constantly on the verge of an accident with something solid.
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Exactly!! HaHa!! We run on a clay track so the stock gripper tires are quite slippy.. I do prefer them over the Arrma Back Flip MT tires though. The Arrma Copperhead2 MT's are a bit more predictable on clay but still quite slippy.
I know TC max pinion reccomended is 13t, but that's with 6.5" tires..we're running 5.5" race tires, still though, I had to reduce back down to 13t to prevent the esc from hitting thermal shutdown. Oh, BTW 13t on 6s with 5.5" tires is plenty for our track!!😜 Now I'm destroying those tire though.. 6s is just brutal on race tires I'm finding. Just shreds the sidewalls.
 
Okay, correction. I just got done ripping my Kraton XL on my little track here at the house. The Kuron 825 is a beast!😁 My mutt of a Kraton has a TRX Vilenion 8s esc, 13/50 gearing with Arrma Copperhead2 tires, running a Zeee 6s 5.2ah 100c brick. I moved the battery tray to the rearward position and wow! I'm tickled with how it's performing!! So I retract my statement about the Kuron 825 being just okay. It's awesome!👍
Sorry for the interuption. How's the speed testing going?
 
KnowAir said:
Okay, correction. I just got done ripping my Kraton XL on my little track here at the house. The Kuron 825 is a beast!😁 My mutt of a Kraton has a TRX Vilenion 8s esc, 13/50 gearing with Arrma Copperhead2 tires, running a Zeee 6s 5.2ah 100c brick. I moved the battery tray to the rearward position and wow! I'm tickled with how it's performing!! So I retract my statement about the Kuron 825 being just okay. It's awesome!👍
Sorry for the interuption. How's the speed testing going?
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Glad to hear your 825 is still kicking ass! 🤣

Speed testing will re-commence soon. My next speed runs will be with the re-balanced wheels and 16/52 gearing with the 4292.

I hope this will be enough to beat 65mph (without going thermal), but I'm doubtful that I'm going to beat 3.79 secs for 0-60 - it's the wrong time of year.

Hats off to Corally though - look how realistic their gearing chart is.
 
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