I just ran the black can 1717 with a XL2 ESC on 8S on a car the same size as the XO-1 at 112MPH on the first test.....and i had no temp issues...... water cooling is pointless unless your doing something wrong......
Last edited by MiamizFinest; 03-07-2012 at 12:33 AM.
In respect to speed run vehicles - most people are divided into two schools of thought...
1. Run a reliable setup that generates huge amounts of torque. Typically low KV motors & large voltage - not much cooling required
2. Unstable setup with (comparably) that generates speed through RPM. Typically moderate to high KV motors & large voltage - make a few passes & stop to let the system cool down
RC_SPEED_JUNKIE is fitting into the second group by increasing his voltage & subsequently RPM. Watercooling may work but I predict it will be fragile & maybe less efficient than the NACA duct already in place or a couple of fans?
I can't recall seeing any 100+mph vehicles that use any form of fan or liquid cooling, it just increases the acceleration & braking distances
My main point is as his car sits, he can run 8S and not have heat issues......I JUST DID IT LAST NIGHT
Right, what RC junkie is doing is more just because he can, not because there is any advantage to his efforts.
I love the idea of water cooling, even if it serves no real purpose. Its one more unique car out there.
Last edited by Dadx2mj; 03-07-2012 at 02:44 PM. Reason: Content
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Rusty - MERV - Pede 4x4-Alias
SPC Lipo Power
Last time i check there's no shout button on the keyboard........you specifically claimed speedjunkie was falling into the second catagory in you post which was simply not true. No need to get bent out of shape just because you where wrong.....some people.....
Hey miami, will the black can 1717 fit in your mugen?
I think so, haven't tryed it!
In the second scenario increasing voltage to increase RPM is what is being done here. The stock setup runs lower voltage...ergo; what I have said is correct & I made no assertion about whether it would be hot or not
Using caps is generally considered shouting in forums - FYI
Shrug, however on the XO we're gearing limited already.... only real choice is raising volts, or higher KV motor...
I keep thinking it might be possible to put the 4x4 slipper in, which would open up the 36 tooth mod1 spur... but its going to take some trickery as things aren't the same size.
I think this is the next step, revo spec slipper. I think it is necessary to try and make the car a bit more stable at speed before we really push the top end up further. I think shocks are the next step with that. There is no droop in the current setup, so as soon as the car gets light, the tires are off the ground.....
Right, if we can make the 4Slash slipper fit, in theory maybe we can get a ERBE spec slipper with aluminum pads in there. Its curious that Traxxas went with a cush drive instead of one of their existing slipper setups.
This is just speculating.... but I figure at speed the car generates downforce, which makes the tires stick, which means you'd have to run the slipper much tighter than you'd expect. Maybe so tight that they found themselves just cranking it down full tight, and then blowing spur gears.
Can you name another car that uses a cush drive?
BUT..... then they make the cush drive so large that we can't fit a smaller, or ANY of the existing spurs made by Traxxas. That frustrates me, because this car is a real departure from Traxxas's history of making cars with transferrable parts. I'm still grumpy that the better hexes on the XO-1 seem delibrately designed so they can't be transferred to any other models.
I think the shocks are ok, the GTR shocks are a proven design. You could always run the variable dampers... although I'm not sure what the advantage would be.
Droop is an interesting question. Again, the design of the XO-1 is tying our hands here. There is very little room for droop, as the car's ride height is next to unadjustable. Curved A arms.... they would let us set a much wider range of ride height, but it'd also allow us to run aftermarket tires, which Traxxas is set on making sure we don't do.
I havent tinkered with the chassis of the xo to much yet, but that will change since I have a lot of repairs to do. Is there something besides the fully extended shock that keeps the a arms from drooping? Will the a arms droop further if the shocks are removed? (i am at work)
There is more room in front... but in the rear the moulding from the difuser ducts limit the down travel of the A-arms. You can flip the arms and get a bit more droop, but the alignment just didn't look right to me.
I'll admit I didn't drive it with reversed arms though.
Maybe a dremel will make more space...
The xo overheats if ran at low speeds i dont feel that is a excellent cooling system
Ponie1992 I received some new parts so once I get those in place I will send you some pics
Also I am building the water cooling system mostly becuase I want too because I like to tinker as much as drive so I'm just having fun with my car in my way
I will still have the cooling duct plus fans the main reason for the water cooling is gonna be mostly so I don't have to remove the high speed gearing to run the car around at lower speeds as I will also probably have some custom gearing made and would rather have my car designed to run however I want to run it without pulling it apart Depending on how I want to drive it that day
That's not novelty that's a better design!!!
Last edited by RC_SPEED_JUNKIE; 03-08-2012 at 06:19 PM.
I am still excited to see the completed build, and videos of it in operation. I think it will exceed the stock cooling performance, but by how much is the question. There has been chatter from castle about 10s and 12s esc in the works. So this thread may become much more relavent in the near future.
That's very cool!!
But seriously not needed for the motor
The problem will be the ESC
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Well I'm considering water cooling my xl2 as well... I'm also going to put additional capacitors on it... Hopefully it holds up!!!
Looking Good and nice clean installation!! Very Nice, thats what the hobby is all about..
now let me have lol
Last edited by Kitchen; 03-09-2012 at 12:06 AM.
I don't doubt that I can run the car without it all I hoped to gain was low speed cooling traxxas says not to run the car for a extended period of time at low speeds with the high speed gearing or it will over heat. I doubt I will have to worry about that im also going to run a bigger pinion gear wich will cause more heat and lastly it's not unneeded weight considering guys are stuffing wheel waits on these cars just to run 100-110 I want to hit 130
Last edited by RC_SPEED_JUNKIE; 03-09-2012 at 06:10 AM.
So were is the vids of these 8s xo-1's everyone supposedly has but yet not one vid anywhere of anyone actually runnin this car on 8s not saying you haven't done it I just want to see it one thread I read a guy says his xo-1 pulls the front wheels on take off I'd like to see that I have a awsome idea for a carbon fiber wheelie bar but it will cost roughly 90 dollars to do it
what would be the point of running the high speed 34 tooth pinion at LOW SPEEDS??
It's not that I'm gonna its just if I am just messin around drifting or whatever I don't have to worry about it getting hot
cool i wanna see some vids of this thing on 8s
You wanna go fast use the 34T, u feel like drifting drop in 15T or what ever. The car will stay cool, your asking for trouble with this set up.