That amazing. Where do you get those little gems at?

So heatsinking the hot side is what brings it down to single digit temps? Wouldn't that be a little too much on the motor or ESC?

Would that run on a 2500mah 3S LiPo?

yeah you can. they are available everywhere. they are also known as Thermoelectric coolers. www.newegg.com is one place. just google it

There are a whole bunch on Ebay also.

The boat ESC I bought has large heat sink on it...I could just lay the cold side right on the heat sink. Right?

You could put one on the motor also but you couldn't cool as much of the surface area of the motor since it isn't flat...

I found some that use 45.6 watts. How much amp draw is that at 12V?

yeah that would work

I was editing my above post while you were applying but I think I answered my self.

If I am reading the product specs properly then that one draws 3 amps. The larger 136.8W one draw 9 amps.

http://cgi.ebay.com/45-6W-TEC-Thermo...3A1%7C294%3A50

http://cgi.ebay.com/136-8W-TEC-Therm...3A1%7C294%3A50

That is a little less than what it calculates out to be...

tower sells these. draws 3 plus amps @12v. http://www3.towerhobbies.com/cgi-bin...C%2FB%3Eectric

A peltier plate? And why would you want condensation? :neutral:

James, that looks great! I have always wanted to do something similar, but at some point it gets too complex and heavy for the average Revo truck... the esc in a sealed box is what I'm talking about.

The Europe made mini pump/radiator system that emaxxnitro posted would work IMO. That thing popped onto the forums 2 years ago IIRC, no one as far as I know has used it, here anyways.

yeah, at this point i am still going to shoot for just using a fan and if that doesnt cool it enough then i will go with a liquid cooled setup like those ones on frozencpu.com. the peltier stuff is too foreign for me at this time. but i am thinking my esc/rx box with a 40mm fan is gonna be sufficient. we'll see i guess.

http://www.espritmodel.com/index.asp...OD&ProdID=5393
i am surprised lutach didn't mention this esc, unless he already did:neutral:, because i am pretty sure he does or used to have one. Maybe he didn't like it? Well it can handle 14s and i think that is what you said was ideal. If you don't mind the price, 545 dollars :gasp:, then it looks like it might be the one for you. This way you won't have to worry about water cooling.

Here is the ESC I am getting: http://www.maytech.cn/eng/proesc.asp?type=6

It is the 200A 10S HV ESC $257 shipped with USB programmer. Several of the fast electric boat guys are saying good things about it. Dual 10 guage power and motor wires. I have some 12V computer fans to try for cooling + I might try the peltier also. The ESC is waterproof so I wouldn't think condensation to be an issue. I don't think there will be much, if any, anyway since the ESC will be warm.

right on. i dont know how you guys manage to find all these brands i have never heard of. must do some good searching on the web. that guy wigdowg on the HBF is using a schulze that has brakes. it was like $550 i think. that is the only esc this size that i have heard has brakes. do either of these controllers have brakes or will you be using mech brakes also Kaz?

btw, just so you know, the integy brakes do work for the front hubs like you showed me in that pic but harder to make work on the rear. they still work but have to use the dremel. i will have to post some pics. i am gonnna have a small piece of aluminum welded on to all of my alum. hubs and then drilled and tapped so that i can mount up the brakes really solid. i just orded a small tap and die kit. i wish i had my own little cnc and welder, etc

No that ESC doesn't have brakes...I will be using Integy.

I'm glad they work. I would rather have them on the rear though. I was thinking that you might be able to "build up" the rear hub with JB Weld to make a better mounting area.

Ryu: Just a suggestion, if you end up using watercooling, you probably wont be able to use that box. It looks like a tight squeeze as it is, but you will have to add tubing to connect the cooling plates. They add a bit of size to the esc.

Otherwise it looks amazing! I can wait to see this in action.

I ordered (4) 5000mah 30C 5S Zippy batteries this morning.

I was looking at the gear that Linc mentioned. After 40T the next size is 48T which is way too big. I wish we could get a pinion smaller than 15T. The speed calculator says 72.887 mph. I know that is theoretical but it still seems way fast.

40/15 or 48/15 = 72mph?

72 mph with a 3/1 diff ratio, 40T spur, 15T pinion, 10S @ 3.9V, 750 motor KV, 6.84 tire diameter, 100 amp draw, and .008 motor resistance.

Am I missing something?

i think that 40t spur is gonna be perfect actually. i ordered the 36t and i think that is gonna be too small but i will try and see. i just dont want my esc overheating cuz its geared to high. and with a 36/18 it is just insane speed. i actually have a 16t, 17t, and 18t pinion gear so i can play around a bit with those but i think like a 40/16 is gonna be the ideal setup on 10s. it will be fast. probably in the 50mph range when its actually on the street. i am heading to the machine shop in like an hour and gonna get the gear cut. i am milling out the center are 6mm so that the gear will sit like the stock gear and shed some weight. i am just gonna save the CAD files so then when i get that 40t spur it will be a quick fix. the 48t is way too big. in fact, i bought a 48t gear already remember? that 48t FG gear. i thought it would work but it was WAAAAY too big. go with that 40t and it will be perfect. or if you want Kaz, i will order 2 of them right now, get them machined and hardened, and you can just pay me the actually cost of everything. the gear is $20 if i recall and i will know today how much to CNC will cost and hardening i will have to find out. i dont think it would be more than $50 for everything though. of course, i have already paid for the machinists time for drawing and stuff so you would only actually be paying for machining time. let me know

also SuicideNeil,
what do you think is gonna be the best gear ratio on these things? you seem to know alot about that stuff. keep in mind the largest spur gear is 40t. 10s, 750kv Neu. what do you think as far as pinion?

if the motor is torquey enough it might not even matter what gearing we run...within reason of course. i was just hoping that with the 36t my temps would be ok still cuz i figured this motor has enough torque that it would be fine. i am gonna order that 40t spur just to be safe though.

btw, i just ran the rc-calc. and with a 40/16 gearing on 10s, 750kv and 7" tire it comes out at 53mph. with 36/16 gearing it is 59mph. 36/18 = 67mph. i was gonna run this gearing if temps are ok. 36/18. 2 to 1 ratio. could be crazy.

Yeah, LMK how much it will be and I will decide.

What am I getting such higher speed on the calc then ? Were you using 3 for a diff ratio? What battery voltage?

i was using standard truggy diff ratio of 43/10 or 4.3. i thought that it was the rampage runs, isnt it? if i put in buggy ratio of 43/13 or 3.3 it jumps way up in speed. 36/18 goes from 67mph to 87mph. do you know exactly how many teeth the front and rear diffs/pinions have?

Yep, both diffs are 33/11

oh $#!t!! this thing is gonna be insane fast then. i didnt realize.

Thats why I was looking for a smaller pinion. Even with a 12T it is still in the mid 50's. RC Monster doesn't have pinion smaller than 15T. The company that we are getting the spur from sells pinions. They call them a spur with hub & set screw though.

Are these Mod1? If so, Mike has down to 9T pinions... or are these Mod1.5 pinions?

Mod 1.5 I emailed him earlier today and 15T is the smallest he has.

Cripes, 1/5 scale is beyond the realms of my 'expertease' Im affraid. I know one thing though, 70mph gearing is way too much as a starting point, I cant see the electorincs liking that much, or the tires. If you cant lower the gearing with a larger spur/ smaller pinion, IO would cdoncider dropping the voltage, just for inital testing.

And hit up the other 1/5 scale builds, tons of info in those regarding gearing and whatnot (a 1/5 scale tranny may be needed to drop the gearing perhaps, rather than a straightforward center diff)...

I found some smaller pinions...12T brings the speed down to 58

I think Mod 1 gears is the way to go...there are a lot more gearing options.

The bore on the 60T mod 1 spur is 10mm though...shouldn't be that hard to drill it out to 12mm.

Mod 1 60/15 brings the speed down to 48.33 mph.

qtcgears.com also has some good choices.

I'm afraid but I also think you should switch to mod one gearing. it's easier to get the right spur gear, and further the difference between eg. a 12 and 13t pinion is less then with mod 1.5.

there is a certain calculation to find out the number of teeth of a spur gear, with a specific diameter. but dunno that calc. just measure the maiximum diameter that would fit.

there is an app. to find gear diameter in BrianG's speed calculator.

The technical drawing of the gears also list the diameter.

Pinion: https://sdp-si.com/eStore/PartDetail...upID=591&Qty=1

Look here for the spur: http://www.qtcgears.com/RFQ/default....rs/KHK064.html

Part number SSA1-60. The bore is 10mm but the tech lady said there was enough material there to drill the bore out to 12mm.

QTC doesn't have anything with a hub & set screw

if youre gonna go with mod1 gears you will want to get a 5mm shaft 2215. there was 2 of them on ebay recently that didnt sell. they were brand new and were up for like $350 if i recall. the seller was jvmaxx. i have bought several motors from him and he is a great seller. anyway, i want to stick with mod1.5 and 8mm shaft myself. if all else fails i will switch to mod1 as a last resort but i think the mod1.5 setup is gonna work just fine. i think a 40t/15t setup is gonna work. i could be wrong but i will know soon. also, Mike initially said that he was gonna have mod1.5 pinions from 11t - 22t. i imagine he just got in the most popular sizes initially since everyone was hounding him about getting these mod1.5 pinions. perhaps he will have the less common sizes like 11t - 14t shortly. a 40t/11t mod1.5 setup would put the speed at 51mph which i think would be reasonable. or there may be a way to get a 42t spur somewhere. i think a 42t spur would fit in the ramp. you could even go with one of those 48t spurs if you wanted to build some shims for the center diff mounts and mount your motor a little higher off the chassis maybe. the center driveline would be angled a bit but it could work. idk, basically there are a lot of options to make the mod1.5 work. same for mod1 also. i had considered going with mod1 myself but i figured they must use mod1.5 on 1/5 scales for a reason and was worried that the mod1 gears wouldnt be strong enough to handle the torque.

edit: i just saw those 8mm bore pinions in mod1 that you found. i didnt see those before i mentioned having to get the 5mm Neu.

oh btw Kaz and others,
i talked to OSE and they said they would have these mounts in stock for the 2215 in about 2 weeks. you might want to email them in a couple of weeks if you havent already found a mount. http://www.offshoreelectrics.com/pro...jwr-mount-flat

also, i am having 3 made of my own, so i will have 2 extra. we worked on CAD designs on tuesday and already have the 3x3 alum block. the shop is supposed to have them done this week. they are gonna be awesome. CNC'd from solid billet 6065 t6. they will have all the holes needed for great airflow. i cant wait to get them back. i still have no idea how much they are gonna cost me but i am hoping not very much.

I ordered one of those strap mounts from Jim Williams at southriverrcboats.com

I think if we could get down to a 10T Mod 1.5 pinion that would be ideal sdp-si.com has a 12T

qtcgears.com has a 42T spur but it has a hub so you would have to grind it off or something.

You might be able to shim the locker mounts and top plate up to get the 42T spur to fit but then you migh run into binding on the dog bones. sdp-si.com does sell u-joints...

Dude, that rampage looks AWESOME in person... the pictures does not do it justice... A buddy of mine had the rampage and brought it out this past weekend, it was sweet as heck... Because of that, I have the MT Pro coming my way... I can't wait.. That rampage is awesome man...! You've got to post of the brushless video when you're done..

i just ordered a couple 40t spur gears and i found a 12t pinion gear that will work. its kind of thick but that will give me more room to set mesh and where i mount my motor.

https://sdp-si.com/eStore/PartDetail...87&GroupID=591

https://sdp-si.com/eStore/PartDetail...74&GroupID=591

i just punched in the figures on the rc-calc and the 40t/12t gearing i think will work sweet. that gives a theoretical speed of 57mph which is the same as all my 1/8s. in reality it will probably do around 50mph which is what i am after. now i just have to hope that this gearing will work and provide cool temps.

Yeah, I think that will be good also.

I have a nice small CPU fan that will run real nice on a 3S Lipo. That should cool the motor.

It's SO BIG part 2:
http://mysite.verizon.net/tbtjsnyder/maytech1.JPG
http://mysite.verizon.net/tbtjsnyder/maytech2.JPG

There are (8) 50V 330uf caps and dual 12 guage power and motor wires. USB programable. I'm not too thrilled about the 12 guage wires, especially since the sales dude said they were 10 guage. We shall see. Pencil eraser for scale.