Brushless hpi baja rc-monster

Started my build, finally. Sorry about the terrible pictures, but I suck at photography. The Neu 2220 fit great. The Turtle Racing easy access diff and the GH bulks all fit perfectly. Very good machining on this kit. Usually I have to file and/or grind a bit to get everything lined up. The diff cups are Phatdad 5mm pin Crossovers.

[Ryu James]

Originally Posted by Electric Eel

Started my build, finally. Sorry about the terrible pictures, but I suck at photography. The Neu 2220 fit great. The Turtle Racing easy access diff and the GH bulks all fit perfectly. Very good machining on this kit. Usually I have to file and/or grind a bit to get everything lined up. The diff cups are Phatdad 5mm pin Crossovers.

is that 2220 the same size can as the 2230? i was looking at buying a 2220 last fall for my rampage and when i called Neu they said it was shorter than the 2230 but just a hair longer than the 2215. but looking at yours i would swear its just the 2230 can but obviously with different windings.

[suicideneil]

*Fap*

Mike

Have you logged your car?

Have a think about this. At the 91% level of efficiency (most Neu 1500s and up will reach this when in the right voltage and load combination) how much change in efficiency will produce a 25% difference in heating?

[RC-Monster Mike]

Originally Posted by Andrewg

Mike

Have you logged your car?

Have a think about this. At the 91% level of efficiency (most Neu 1500s and up will reach this when in the right voltage and load combination) how much change in efficiency will produce a 25% difference in heating?

Yes, I have logged my Baja on 7s and 8s with multiple gear ratios. 8s with the 12t pinion is my favorite, and this setup yields upwards of 170 amp burst rates. I have logged upwards of 4000 watts peak power output with the 12t pinion, too.
It is true that a Neu or Lehner motor in ideal circumstances may reach 90% efficiency, but this would be in very specific circumstances that will not happen very frequently if at all, and not for sustained periods in typical rc car use. Consider that the motor would need to be in ideal circusmtances, as well as the ESC, batterries, etc. - there is resistance in everything along the way(the gear mesh will cost 1-2% efficiency in power - even more in the tranny itself, the battery connections, wire, ESC, etc. all have resistence that makes achieving 90% efficiency extremely unlikely in the real world)Actual efficiency will likely be very significantly lower. Regarding heat - even if you use 90% efficiency as the baseline, dropping to 80% efficiency(still somewhat unrealistic throughout the run) would double the heat generated(so a 10% efficiency reduction would yield 100% more heat). It is very significant.

[thomatrix]

Mike - what is the maximum lenght a motor can be and still fit?

Ryu James - I am quite sure this is not a 2230 can. I have tried to measure the space based on measurements in photoshop and from what I calculated there is approximately 114.8mm space for the motor can and the Neu 2230 is around 119.4mm long so it could not fit.

[suicideneil]

AndrewG- trust Mike, and us, in trucks this size you need more motor than you do in something 50% lighter. Big truck = big motor, hence why a little S can motor being used in a maxx sized truck would fry & not be able to achieve a speed in excess of about 20mph. Since full throttle is only used sparingly usually ( due to lack of space ), the motor wont destroy the truck's driveline very easily and overpower the truck- yu just gotta learn how to tame the beast & handle the power

And Mike did state that he logged his runs with an Eagletree too.

The 2220 is 4.3 inches long. There is 5 inches of space for a motor on the kit, so a 2230 might fit. You would have to poke the wires through the chassis brace, but I think it would work.

As far as motor size, my experience is the bigger the better. I went to the 2220 because my 2215 was getting uncomfortably hot when running in grass after multiple packs. This was with a gearing of 58/16. Mike's kit lets me go down to 58/14. With a lower kv motor(and a larger one), I think I'm all set for bashing.

It's all good, watching a huge 1/5 scale leap around like a Savage Flux is one of lifes joys.

[thomatrix]

Mike - Can you confirm that there is 5 inches (127mm) of space for a motor?

Here's a picture. 5 inches exactly.

[thomatrix]

Thanks so much for this!

From that pic, a 2230 would fit. It may be tight with the wires though. Once Mike gets some more kits in stock, I'll let you know. I'll pick one up for my e-baja

[thomatrix]

I just ordered one too. I know it may be going over board but I have a 2215 and ordered a 2230 + a Lehner 3060 to try out on two bajas.

Excellent thread here btw! Thanks of all the pics and info. Much appreciated.

[FG101C]

This thread is going to make me spend more money I shouldn't spend. My 1:1 car is freshly paid off though,

[Ryu James]

Originally Posted by thomatrix

I just ordered one too. I know it may be going over board but I have a 2215 and ordered a 2230 + a Lehner 3060 to try out on two bajas.

Excellent thread here btw! Thanks of all the pics and info. Much appreciated.

where are you buying your motors from? particularly where did you buy your lehner?