So I was doing some testing last night in sine mode --- super slow stuff. Figured if I am going to the creek its got to be ready to long haul.
What I found was in prolonged extreme slow speed crawling the motor REALLY heats up alot. 5minutes of speeds under something like 0.1 - 0.2mph and I got temps up in the 160's. Its just too hot -- its not even 80 out yet so come summertime this will be a problem.
I had a feeling this would happen as the 4250 can bog in high gear -- not easily but it can. So this motivated me to get the 5065 motor going.
It was a host of issues in terms of clearancing the shock tower and getting the large 8mm bore pinions to fit in the motor mount. The 8mm bore MOD1 pinions have large thick collars for carrying the set screws --- and the SCX6 sliding style motor mount even though its made for big motors is more designed for motors with 5mm shaft / pinion bore. So they didn't make the neck large enough around for the 15-16mm collar width of the pinions with 8mm bore.
I ended up getting a 15 and a 25t working in the end ---- had to turn the collars down a far amount using a drill and a file (my life-long angle grinder/cutoff wheel sh_t the bed this morning in full theatrics with a nice plume of noxious smoke for its last exhale -- may she R.I.P., -- SO SO SO many parts cut with it and fingers remained in tact thru the years, I AM GRATEFUL!!!) --- took about 1.25mm off and that got everything freed up to rotate. I also had to shorten the motor shaft -- stuck out too far, I also had to take 1mm off the top of thee pinion -- it was too thick and slightly rubbing against the back wall of the transmission as it rotated -- the 15 was thicker so needed more removed. UGH lots of filing and cutting and fitting and re-filing and cutting -- don't want to go too far, I had to shorten the set screws as well because they stuck out too far and also contacted the inside of the motor mount, had to add flat points to the motor shaft and the 15t has two set screws at 90 degrees while the 25t has two set screws at 180 degrees


. Yep, didn't finish till 6:37am this morning!
/
Happy to say the 5065 is in and working great -- the ESC seems to have no issues I was a tad worried just a RHINO 80Amp AM32 jobby for $60. Plus the motor at $27 ----- not bad pricing under $100 for big rig big power!!
With the 15t pinion this thing is a real crazy STUMP PULLER!!! No doubts it can pull real cars/trucks if the Ryft Vitavon axle gearing was up to it... ?
Its not as fast as before 15t is just absurd slow and 25t as I said is about a brisk walk pace but no where near jogging anymore --- 400kv was the highest speed I could find for the 5065 bigger motors vs 600kv for the 4250's..... but I haven't tried it on 8s yet which is the ESC's max voltage (and probably won't because that will def have axle breaking power). Maybe i'll see if its happy on 6s for some hill climbs or mud bogs if I need more wheelspeed and def come winter time snow rippin' will volt it UP!!!
The smaller motor cogged weirdly at start on 7s -- not certain if was motor or ESC, prolly motor since ESC claims up to 8s. Am wanting to retry that situation now the big motor is in just don't want to blow it right out the gates so maybe in a week or two will do some 6s hits. I do have a spare AM32 80A ESC (generic brand and only rated to 6s though. cheaper at $35!) for BTC if I blow this one fiddling before May 2 if I end up even going of course.
Allegedly this motor can run UP TO 12s (with the a capable ESC), they also make a sensored version of the 5065 -- for the same price - $30 what a steal !!!
