New HV Sintered Tuning Rotor with 5mm Shaft Question
 

I noticed on Novak's website they are advertising a new rotor for the HV motors.

"Description

This is Novak’s HV Sintered Tuning Rotor with 5mm Shaft – 14mm (#5951). The 14mm rotor’s larger diameter and improved magnetic material provide a higher temperature threshold, enhancing its durability. Its higher magnetic field also increases the motor’s natural drag braking and improves its acceleration response.
The HV Tuning Rotor is compatible with Novak’s HV Brushless Motors with 5mm Shaft (#3524-#3527) and Novak’s original HV Brushless Motors (#3424 & #3426) with an upgraded 5mm Lightweight Front End Bell and Bearing Kit (#5917).

To take advantage of the lower Kv generated by the HV Sintered Tuning Rotor, Novak offers four 5mm Mod 1 Steel Pinion Gears 17T-20T (#5111-#5114) that are compatible with the 14mm rotor.

Expected Ship Date: End of May 2009"

In general I am sorta a newb with motors, so can someone (NovakTwo?) explain to me why I might (or might not) be interested in this?
Is the only improvement the drag break and acceleration? I know with their previous rotor improvement it increased the wattage of the motors, will this rotor effect that? Am I properly understanding that it will help the motor run hotter (without failing)?
Explain it to me as if I were slow... (because with motor stuff I am).

Thanks

The way I understand it, your hunches are correct. A stronger magnet will spin slower all other things being even, so to take advantage of the extra power/ torque you can gear up another notch or two; the difference between the original hv4400 motor and the upgraded sintered rotor was quite impressive I found. I still wouldnt recommend exceding 180*f though regardless, as the epoxy coating on the windings will cook/melt even if the rotor doesnt, and thats a recipe for cooked motor & esc.

Depends if you feel you want more power from your hvmaxx setup- more power for the cost of a $30? rotor is pretty good, but if you're happy with how it is, or want something much more powerful, maybe not then..

Feeding the hvmaxx good lipos vastly improves its power though, but I'd guess you're using them already.

Good old Neil always posting about novak... Good thing novak hasnt upgraded their systems since you owned one in 2002...DOH

they are testing a ballistic hv right now should see it soon. it didnt look any faster than the old ones on 4s. he was worried about making the 10 min race, not sure why he wouldnt say.

As the first one to have 1/8 power products, I would like to see Novak continue leading.

LOL and LOL.

When you look at things realistically, Novak HAVENT updated their hvmaxx system much since when I got mine. The esc looks 99% the same, just has a few new basic programming options, though thats better than none at all essentially when I had mine.

The esc motor is essentially still identical, they just introduced a finned can and a larger shaft diameter, and a few extra kv choices (anywhere between too fast and way too fast unless you gear down lower than George W Bush's IQ, otherwise the motor is over loaded and fries). The sintered rotor is a nice upgrade that came out about 3 years ago, so this new tuning rotor is just a slighter better version of that really.

As for being the first company to make a 1/8 system = :rofl:, yeah right. The hvmaxx was designed to drop into the stock 3906 emaxx, and that is a 1/10 MT, electric 1/8 vehciles hardly even existed back then and I sure as heck didnt see any running the hvmaxx either at the time, only novak sticking the system in a TC to make it do 100mph on 5s lipo a few years later.
The fact is lots of other companies beat Novak to the punch with their more powerful escs and motors (Castle, MGM, Schulze, Quark etc) that people were sticking in the 1/8 stuff along with feigao, Aveox, neu, PLett etc motors to create their own truelly 1/8 suitable systems- Novak just realised their hvmaxx could also work in a vehicle lighter than the emaxx, so came up with a center diff mount unit and battery tray (hmm, where have I seen someone do that before...) and called it a 1/8 conversion kit. Since the hvmaxx is a complete system there was no need for users to find there own esc and mtoor, so behold, its suddenly the first 1/8 'system'. If castle had their MMM motors out earlier they would be able to claim that title, but given the difference in power handling, gearing range & voltage, the MMM is was the first proper 1/8 system anyway, followed by the RX8 and Hobbywing, and the Losi thing.

Anyone can slap a 1/8 label on their sytems so long as it will actually work in a 1/8 vehicle, which even an MM and L can motor can do. :smile: (not that Im bashing Novak, I still enjoyed the hvmaxx, taught me a lot).

Novak introduced me into the brushless world, the GTB/velociti system still works great in my 1/10 HB D4 buggy, especially after I changed to their thicker tuning rotor.

Sensored design was what Novak anounced they were proud of, now seems like all they have. I've never seen a sensorless BL from Novak but others all have both sensored/sensorless, Hobbywing\Tekin\CC's coming MMpro. I believe Hobbywing and Tekin's choice is the way to go, start with the sensors, run without.

Come on Novak, get us some real powerful thing.

I am running the new sintered rotor.
 

Have installed the new rotor on my hv 6.5 in my e-revo have it geared 68/18 temp are 115 esc 115 batts 121 batts 43 mph very fast out of the hole and that on max amps 4700mah nimh batts 16.8 volts.