High Amps-Don't Worry (Pictures)

For everyone worried about the Monster's ability to handle high amps, well don't worry at all. I have run 4 packs of 6S 5000mAH Flightpowers through the setup below with no problems. No high temps either. It is a Neu 1527 1D (2300kv), so on 6S it pushes about 51,000 RPM. And sucks current fast! My servos are a 5955 (333oz/in) and a 645 (133oz/in). No BEC problems either. Great job Castle! Sorry about the nasty looking roll bar, but hey, it works. Now to finish the rebuild, new bumpers, new wheelie bar 2 dogbones twisted etc. etc. etc. Diffs are holding up great-go figure!?!?!?

[lutach]

That is awesome. Got any video of you truck in action?

[jnev]

Great looking truck! And I bet it is a handful to drive as well. Glad the MMM is working well out for you. Keep us updated on how it does long term. I am sure it will be nothing short of awesome.

[Pedebeater]

that sounds great! THank you so much for sharing your good experiences. I hope mine will turn out as good as that.

A vid or two would be great too.

[nl12]

What is the weight on that beast? Does the motor stay cool? I wish you had an eagletree.

[jhautz]

What kind of gearing and speeds are you pulling with that beast. And Id like to know the weight also.

Certainly is a beast.

It weighs just over 15 pounds with the battery. I run a 52/13 ratio for bashing and the motor gets warm, not hot. The same with the ESC, just warm to the touch. I tried a 52/20 ratio for a speed run and just did not have the space or the control to get to full throttle. LOL-at the end of the run the truck tumbled for about 30 feet even after slowing down. I don't know enough to set up for high speed runs, but I might learn to, they are a blast! I have my Eagletree in my heli but it only goes to 100 amps max. I'm sure it's pulling more than that. I just bought a video camera so when I can get it away from the wife I will shoot a few clips.
Thanks again to Castle for a great product and thanks,also, to HPI. This Savage drivetrain is amazingly tough! If you do a conversion, get the diffs with the alloy case and steel pin inserts then add the optional hardened ring and pinion setup (R+P is $30 a set but well worth it). For the tranny, the Hot Racing 44 tooth hardened steel internal spur gear is a must. It all adds up to a very robust drivetrain.

Originally Posted by Electric Eel

It weighs just over 15 pounds with the battery. I run a 52/13 ratio for bashing and the motor gets warm, not hot. The same with the ESC, just warm to the touch. I tried a 52/20 ratio for a speed run and just did not have the space or the control to get to full throttle. LOL-at the end of the run the truck tumbled for about 30 feet even after slowing down. I don't know enough to set up for high speed runs, but I might learn to, they are a blast! I have my Eagletree in my heli but it only goes to 100 amps max. I'm sure it's pulling more than that. I just bought a video camera so when I can get it away from the wife I will shoot a few clips.
Thanks again to Castle for a great product and thanks,also, to HPI. This Savage drivetrain is amazingly tough! If you do a conversion, get the diffs with the alloy case and steel pin inserts then add the optional hardened ring and pinion setup (R+P is $30 a set but well worth it). For the tranny, the Hot Racing 44 tooth hardened steel internal spur gear is a must. It all adds up to a very robust drivetrain.

i found the 3 easest and cheapest way for highspeed runs is
1. low as you can go. Drop the ride hight as low as you can get it. but dont let it bottom out, because then it will want to bounce and loose control.
2. stiffen up that suspension. Easest way and most effective Super stiff springs. oil doesnt play a huge roll like it does when your jumping.
3. Low profile tires. and tape the inside so they wont balloon.

Well, the Savage Monster is still going good. But the 2nd Monster I got for my E-Maxx just died that same quiet death as everyone else's. Still batting 500 isn't bad!

I'm taking the 1527 out and selling it on eBay (the plane it was going in was destroyed by my niece). Just too much power! Not only was driving uncontrollable at higher speeds, but weird problems showed up. Like not being able to keep the motor in place (the mount would torque twist loose) or pinions from spinning free. Just ordered a 1521 from Mike. It should be a little more sane! Fun while it lasted though. Oh, the MMM held up fine to this current hog. It's still going strong, no thermals or BEC problems.

[DRIFT_BUGGY]

OMG, that 1527 is huge. What KV 1521 did you order? How many batteries did you run with the MMM and 1527?

I ran 6S with the 1527 and will run the same with the 1577kv 1521.

[jordan...]

hi,

Nice build! i have some quick questions for you, as im going to be running pretty much the same power setup in my G-maxx.

1. what runtimes were you getting with the 5000mah flightpowers?
2. what C rating where the flightpowers?
3. did you use much/any punch control with the MMM? if so did that tame the power down at all?
4. any other 'weird' problems i should be aware of?

thanks very much for your help, hopefully i won't be selling mine after a handful of runs as well

jordan

[Sammus]

Did the batteries get much heat in them?

The batteries were 25C and lasted about 9 minutes. Just got warm, not hot. Tried up to 50% punch and it was still tough to control. Other weird problems were all torque related. You will have to grind a flat spot on the shaft. Even with red Loctite it will work its way loose. The tranny shaft that the slipper mounts on will snap if you nail it too hard. The outdrives will also twist after a while, keep plenty of spares on hand. Also, replace the plastic 44t spur inside the tranny with a hardened metal one. The plastic one smokes almost instantly. The diffs hold up fine if you use the new hardened ring and pinion set from HPI. Let's see, what else. Oh yes, the only wheels that don't deform into an undrivable mess are the Pro-line MTR's with the molded foams. Any other tire and strapping tape is needed just to make it drive straight.
Honestly, the 1521 is better. More power than you can use without all the problems. The 1527 will have you repairing something every run, and I mean EVERY run. The trucks just aren't made to handle the power. I figure it is like the dual nitro engine setups, more trouble than they are worth. Anyway good luck you will need it!