Put in my order for a Pro Race Roller...

[rock hard]

you can adjust the drag brake to the highest level where it can hold the truck till the rear would want to flip over which was about 60-70 degrees for my truck on the 18.5t mongoose

I always had mine maxxed out.The problem is it was not consistant enough for me. Also of the 3 mongoose systems I have used,none was consistant.

And though they may be fast,you really have to fight to get the torque some times.Most guys run the 15t pinion,if you do and dont like the torque
get a 12t pinion and you will see your torque improve drastically.

 

[89redranger]

I always had mine maxxed out.The problem is it was not consistant enough for me. Also of the 3 mongoose systems I have used,none was consistant.

And though they may be fast,you really have to fight to get the torque some times.Most guys run the 15t pinion,if you do and dont like the torque
get a 12t pinion and you will see your torque improve drastically.

Thanks for the input! I will be getting the truck in the morning, and I can't wait!

I am going to send the 13.5T setup back as well as the servo for store credit at their original prices. I'm just gonna have them send me the 18.5T setup with the crawler specific setup and a full size servo.

Anybody know anything about the Towerpro MG946R? This servo claims 208oz. torque at 6v with a transit speed of 0.17 seconds for $19!!! Just so happens that the Mongoose setup has a BEC set at 6.0v built in...

 

[TedBull]

Thanks for the input! I will be getting the truck in the morning, and I can't wait!

I am going to send the 13.5T setup back as well as the servo for store credit at their original prices. I'm just gonna have them send me the 18.5T setup with the crawler specific setup and a full size servo.

Anybody know anything about the Towerpro MG946R? This servo claims 208oz. torque at 6v with a transit speed of 0.17 seconds for $19!!! Just so happens that the Mongoose setup has a BEC set at 6.0v built in...

Never heard of that servo but thats a hell of a deal for 208oz of torque. I say go for it. A hitec 645MG is $30 and only 130oz i think. The transit speed is not all that important for a crawler IMO. The BEC in the ESC should be fine for that servo, if you upgrade later to a ultra torque servo its advised to use a CC BEC and wire it directly to the servo bypassing the RX.

 

[soundcolor]

First off. Getting a servo with over 150oz is a waste. Your never going to uße that Mich power. EVER.

Hi-tech 645 for the win. 130oz. I've never needed more and I beat on my mrc hard. Still going strong after 2 years.

Mongoose will be fine, you can adjust with pinion if needed.

Lipo will be fine ad well. There are better, cheaper ones out there, but it'll do the job.

 

[89redranger]

First off. Getting a servo with over 150oz is a waste. Your never going to uße that Mich power. EVER.

Hi-tech 645 for the win. 130oz. I've never needed more and I beat on my mrc hard. Still going strong after 2 years.

Mongoose will be fine, you can adjust with pinion if needed.

Lipo will be fine ad well. There are better, cheaper ones out there, but it'll do the job.

Doesn't look like I have much choice either way. Called the company to see about returns, and was abruptly told that there are no returns on electronic items once they've touched my hands.

Guess I'll be the one to report on how a 13.5T brushless setup and that little 5245MG work for a crawler.

I asked them "Well, I have yet to see the damn thing (why did I pay for 2-3 day shipping again???) or put my hands on it. Can't I just send the whole unopened package back so you can put YOUR hands on it and swap some stuff out?"

They didn't think it was very funny...

Oh well, learned this time. Don't press the order button if you don't mean it, are compulsively trying to get your order in half-asleep, or haven't done your research. 2 of 3 apply to me...

 

[rock hard]

First off. Getting a servo with over 150oz is a waste. Your never going to uße that Mich power. EVER.

Hi-tech 645 for the win. 130oz. I've never needed more and I beat on my mrc hard. Still going strong after 2 years.

Mongoose will be fine, you can adjust with pinion if needed.

Lipo will be fine ad well. There are better, cheaper ones out there, but it'll do the job.

I guess I'm wasting my money with a 8711 then:ror:

The 645 is a top choice for a mrc though IMO

 

[fallin apart]

Doesn't look like I have much choice either way. Called the company to see about returns, and was abruptly told that there are no returns on electronic items once they've touched my hands.

Guess I'll be the one to report on how a 13.5T brushless setup and that little 5245MG work for a crawler.

I asked them "Well, I have yet to see the damn thing (why did I pay for 2-3 day shipping again???) or put my hands on it. Can't I just send the whole unopened package back so you can put YOUR hands on it and swap some stuff out?"

you can always just sell it once you get it and then just buy the 18.5t

 

[89redranger]

No mail today. Apparently it's President's Day...

 

[TedBull]

First off. Getting a servo with over 150oz is a waste. Your never going to uße that Mich power. EVER.

Do you compete in the 1.9 class? The 645MG servos are great for a backyard crawler but are limited in competition from what I have seen and experienced. I ran a 645MG for a very short while and now it is in my tool box as a spare. Its not a waste if you use it to its potential, I can get my front tires wedged into a spot and then use my powerfull servo to move the entire rear of the truck to my advantage as far as placement thru gates. I also have 9oz of weight for each front wheel/tire so it helps to have a good servo. So, I use that much power. ALWAYS.

 

[fallin apart]

I run the mayhem servo on my mini with the metal servo arm and it workes great on my mini and my mini IMO i think it's heavy at 3.18 lbs

heres my servo
http://store.rc4wd.com/Mayhem-High-Torque-Metal-Servo-_p_484.html

 

[scatterbrains]

Mongoose is a great system i have had nothing but good things to say about it. it works well has good speed and great torque. The drag brakes are good. Im runnin the 18.5 system

 

[89redranger]

Like I said, I'm stuck with the 13.5 system. I'll gear it down for the time being and hopefully trade it off if that doesn't work out... At some point I'll most likely end up with a brushed type motor and ESC.

For the time being I'll get it put together when it shows up, do some tuning, mods, and setup with the parts I have and have already ordered. I think the servo will work for a while. I'll just save some cash for another one, cause it sounds like it's days will be numbered.

 

[rock hard]

Like I said, I'm stuck with the 13.5 system. I'll gear it down for the time being and hopefully trade it off if that doesn't work out... At some point I'll most likely end up with a brushed type motor and ESC.

For the time being I'll get it put together when it shows up, do some tuning, mods, and setup with the parts I have and have already ordered. I think the servo will work for a while. I'll just save some cash for another one, cause it sounds like it's days will be numbered.

Ok I know you have already spent your cash...but If your gonna run this 13,5
then pick up a hr 62t spur,that larger spur will also allow you to run a smaller pinion before the motor hits the trans case.

I would say a 62/10 gearing is what I would shoot for

 

[89redranger]

Ok I know you have already spent your cash...but If your gonna run this 13,5
then pick up a hr 62t spur,that larger spur will also allow you to run a smaller pinion before the motor hits the trans case.

I would say a 62/10 gearing is what I would shoot for

It's on the list. It'll be ordered on Friday (payday!!!).

I went through the trans/motor clearance issue with my last crawler while trying to play with the gearing and the factory motor. Needless to say, it's pointless playing with the gearing on those worthless chunks of metal!

 

[soundcolor]

I guess I'm wasting my money with a 8711 then:ror:

The 645 is a top choice for a mrc though IMO

Im sure your monster will be plenty!!!"thumbsup"

Do you compete in the 1.9 class? The 645MG servos are great for a backyard crawler but are limited in competition from what I have seen and experienced. I ran a 645MG for a very short while and now it is in my tool box as a spare. Its not a waste if you use it to its potential, I can get my front tires wedged into a spot and then use my powerfull servo to move the entire rear of the truck to my advantage as far as placement thru gates. I also have 9oz of weight for each front wheel/tire so it helps to have a good servo. So, I use that much power. ALWAYS.

Let's see, 9oz in each front, that's 18, or a shade over a pound. Whole truck might weigh 5 lbs (not likely, but it might) so if we add 5lbs, ( 80oz ) to the 18 in the front, that's 98oz. ( tho, I doubt your whole rig weighs even 5) that still leaves 32 ounces, or 2 lbs of extra the 645 has in it.

Which means, if your rigs front end was completely wedged, and immovable, the 645 would have more than enough power to move the entire rest of the truck.

Now, maybe your esc sucks, and isn't putting out full power, which is a strong possibilty. In which case I would highly recommend a beg. If you've never seen a 645 at full power then your missing out.

Yes a more powerfull servo will do more. But if its not needed then why bother. Then there's the weight issue. Stronger servos are heavier. And something I have learned is that lighter rigs outperform heavier ones. Just like flies are more agile than a 747.

And just an fyi,I've been running the mrc since before you even heard of rock crawlers. So, do some research kiddo.

 

[TedBull]

Im sure your monster will be plenty!!!"thumbsup"



Let's see, 9oz in each front, that's 18, or a shade over a pound. Whole truck might weigh 5 lbs (not likely, but it might) so if we add 5lbs, ( 80oz ) to the 18 in the front, that's 98oz. ( tho, I doubt your whole rig weighs even 5) that still leaves 32 ounces, or 2 lbs of extra the 645 has in it.

Which means, if your rigs front end was completely wedged, and immovable, the 645 would have more than enough power to move the entire rest of the truck.

Now, maybe your esc sucks, and isn't putting out full power, which is a strong possibilty. In which case I would highly recommend a beg. If you've never seen a 645 at full power then your missing out.

Yes a more powerfull servo will do more. But if its not needed then why bother. Then there's the weight issue. Stronger servos are heavier. And something I have learned is that lighter rigs outperform heavier ones. Just like flies are more agile than a 747.

And just an fyi,I've been running the mrc since before you even heard of rock crawlers. So, do some research kiddo.

Im running a Teking FXR, and CC BEC @ 6V wired directly to the servo along with MaxAmps 850mah 2S 100C. So I got the juice, I just was not 100% happy with the 645MG. It is a good servo and works plenty good for most people I imagine I just prefer to have more. My JRDS8711 is probably overkill and is kinda bulky but I had it from another build so I dropped it in. I am not trying to start a war of words and I do respect you and your input, just saying that the bigger servo is working great for me and many other guys running the same servo in my club. Some of the guys running the 645MG in our club are having issues. We do crawl alot of "Rip Rap" and only a couple comps on "Mono" rock. My rig is somewhere around 3.5 pounds.

 

[rock hard]

Im sure your monster will be plenty!!!"thumbsup"



Let's see, 9oz in each front, that's 18, or a shade over a pound. Whole truck might weigh 5 lbs (not likely, but it might) so if we add 5lbs, ( 80oz ) to the 18 in the front, that's 98oz. ( tho, I doubt your whole rig weighs even 5) that still leaves 32 ounces, or 2 lbs of extra the 645 has in it.

Which means, if your rigs front end was completely wedged, and immovable, the 645 would have more than enough power to move the entire rest of the truck.

Now, maybe your esc sucks, and isn't putting out full power, which is a strong possibilty. In which case I would highly recommend a beg. If you've never seen a 645 at full power then your missing out.

Yes a more powerfull servo will do more. But if its not needed then why bother. Then there's the weight issue. Stronger servos are heavier. And something I have learned is that lighter rigs outperform heavier ones. Just like flies are more agile than a 747.

And just an fyi,I've been running the mrc since before you even heard of rock crawlers. So, do some research kiddo.

Trust me sound,most of the time a 645 will do it,but its when your in a tight spot and it wont do crap that makes you want more.

The 645 wont turn if the front is under much pressure with the steering already at an opossing angle. My futaba s9551 on straght 2s still has times it wont handle what I dish out.

IMO a perfect sevo would be low profile like the futaba,able to run on 2s
and put out around 300oz and ti gears.

 

[89redranger]

Well, it's been a while now...

I got the crawler together a while back, sent the 5245 and 13.5T back and received a 645mg and 18.5T Novak System. I've got 3.4 OZ added to the front wheels (lead fishing weight wrapped around the rim twice is 2 OZ, one wrap around the inner beadlock ring is 1.4 OZ), 1.4 OZ to the rears.

I'm running my shocks inverted with the outboard spacer kit, a single hole piston in the left rear shock with 40w, 2-hole right rear with 35w, and 3 holes in the fronts with 35w, pen springs below the pistons, and stock MRC chrome springs all around on the outside of the shocks, and no droop limiters other than the springs. With the shock mount arms in the lowest position it limits compression travel while the pen springs control and stop droop.
Seems to work well. Stock articulation was almost 90 degrees, now it's at around 50-55.

Works well thus far, but I already want more.

Servo could use more power (bigger servo and BEC planned), motor has awesome torque, drag break is sufficient one setting below max, and no cogging that I've noticed. But...

It lacks anything resembling wheel speed for those climbs where you just gotta goose er! I think I'm gonna step up to 3s soon anyway beings my tire got ahold of the edge of my Losi Lipos and chewed them to shit.

Maybe a motor upgrade is coming in the future?

Maybe I should've stuck with the 13.5T?

Enough talky talky, I've got a few crappy cell phone pics on myskank, I'll post up the link...

http://www.myspace.com/brian12486/p...697#mssrc=SitesPhotos_SP_AlbumCover_ViewAlbum

Videos coming soon enough, just waiting for a camera.

 

[89redranger]

Well, I blew up the tranny... The main shaft gear has no teeth left! Apparently plastic isn't the hot setup with the brushless.

Metal Hot Racing gears are getting ordered Friday for it, along with a set of Losi billet knuckles, Cs, some 3mm rod-ends, aluminum, some set screws to build BTA steering. Wideners for the front will be ordered as well, and the billet wide hexes for the rear.

Think wide hexes in the alone in the rear with narrow billet hexes and wideners would be too much of a variance in width? I wanna keep the track width around stock in the rear and widen up the front a little. Maybe 1/4 or 5/16" per side?


Edit: Mini E-Revo Pinion will be here tomorrow! Can't wait to see how she drives with the overdrive mod, too bad the tranny parts have to wait...

 

[notez2beat]

RedRanger...I have a Pro being delivered today. Did yours come with a pinion gear or did you have to order that seperate?