The pro-modler servo looks like a good servo but in order to get the full potential out of it you have to run it at 8.4V which will generally require a stand alone programmable BEC like
THIS one from Castle Creations.
Heres what I dont get though... Look at the sizes of these different servos.
Savox SB-2290SG Black Edition (Standard size 1/8 scale servo)
Dimensions L x W x H (mm): 40.3 x 20.2 x 38.7
Traxxas 2085
Dimensions: 50 x 24.9 x 51.5mm not including heat sink
Pro-Modeler DS1155BLHV
Dimensions: 40 x 20 x 38.7mm
JX PDI-HV2070MG (Standard size 1/5 Scale Servo) (This is what I'm running in my K8 and theyre cheaper on Amazon than eBay.
LINK)
Dimensions: (LxWxH) 65.8x30x57.4mm
Typical Traxxas BS.... So looks like Traxxas servo is some sort of weird size in between a standard 1/8 and 1/5 scales sizes and I know its got some sort of proprietary mounting system in it. Stoner says you can get mounting plates for the Xmaxx in order to use non Traxxas servos but my question is this. If you buy a non Traxxas servo what scale servo do you have to buy in order for it to fit with the mounting plates? A 1/8 or 1/5 Scale servo?
On another note lets assume for a moment that you have to buy an 1/8 scale servo in order to make it work with the mounting plates and lets assume Pro-modeler isnt full of chit about their specs.
SB2290SG - Monster Torque Brushless Servo, Black Edition - $152.99 + Free S&H
Torque @ 8.4v - 972.1oz-in
Speed @ 8.4v - 0.11 sec/60 deg
Pro-Modeler DS1155BLHV - $149.99 + 12.25 S&H
Torque @ 8.4v - 1155oz-in
Speed @ 8.4v - 0.10 sec/60 deg
If their specs are true then for an extra $9.25 you would get an extra 182.9 oz-in or torque and an extra 0.01 speed. Id probably spend the extra to get the extra (Your mileage may vary) but heres a couple of things that popped out at me when looking at all these servos.
This is a screen capture straight from pro-modelers website...
View attachment 134822
So pro-modeler is basically dragging the Savox servo through the mud in an attempt to demonstrate how superior their servo is over the Savox but where in the hell did they get those specs for the Savox? Heres a screen shot straight from Savox's website on the specs for their servo.
View attachment 134823
Now I'm assuming since pro-modeler listed the Savox's speed as .13 then they are supposedly quoting the specs of the servo at 7.4V. Well if thats true then not only did they lie about the servos torque out put at 7.4V but its also shady AF to sit there and underhandedly compare their servo specs at 8.4V
against Savox's specs at only 7.4V. So in my book pro-modeler already shot themselves in the foot, at least as far as I'm concerned, because now I can't trust anything else theyve said about their servo.
Additionally as you can see in the screenshot of the Savox's servos specs, its Waterproof. Pro-modeler says nothing about their servo being water proof.
Lets explore this statement on Pro-modelers website.
View attachment 134826
Pro-modeler brags about their bearing being 25% bigger but looks to me like its really only 25% taller. Not sure how much that really means in the over all scheme of things. maybe someone that has technical knowledge of bearings can chime in as to how much difference that would make in real world applications but we can explore other aspects of this statement.
On top of the bearing being "bigger" they claim their bearing is shielded and ABEC-9 rated. Lets pick that apart for minute. The bearing is in a closed environment that is filled with grease. Does it matter that their bearing is shielded? I'm not a bearing engineer but my gut says "no, it doesn't". In fact wouldnt a shielded bearing actually be more prone to retaining heat than an unshielded one? Again not a bearing engineer but the thought pops into my head giving me cause to wonder.
Ok now on to ABEC ratings... Heres a screen capture from Wikipedia
View attachment 134829
Ok, So its true that Savox doesn't give us the ABEC rating on their bearing but would it matter if they did? According to the screen capture and ABEC5/ABEC7 bearing could be as good or better than an ABEC9 depending on the other critical factors that arent taken in to account in the ABEC rating scale. Plus we havent ruled out the possibility that Savoxs bearing may also be ABEC9 anyway.
Now the one (and damn near only) truth that I can see Pro-modeler spewing about their comparison against Savox is that their gears are "beefier". Again though what they dont tell you is that Savox sells replacement gear and bearing sets. I dont see that offering on Pro-Modelers website.
So in conclusion, after you peel back all of Pro-modelers marketing bullsh*t. I dont even trust that they are truthful about their servo specs. Who knows what kind of shadiness may have went on during their servo testing where they generated those specs from in the first place. Hell at this point even if their specs were true and they were the ones who are $10 cheaper I still wouldnt buy their product just on principle but you guys can judge that for yourselves. This is just the rabbit hole I ended up exploring once I started seeing inconsistencies in what I was seeing and reading.