|
| LinkBack | Thread Tools | Display Modes |
12-07-2011, 10:52 PM | #1 |
Quarry Creeper Join Date: May 2009 Location: Under Communist Occupation
Posts: 271
| Okay, GRU lovers need motor advice!
Anyone running a cheap 19t, 20t, or 21t can with the GRU? Looking for the GRU grunt, more speed, and the ability of the GRU to act as a drag brake. Thanks |
Sponsored Links | |
12-08-2011, 12:48 AM | #2 |
I wanna be Dave Join Date: Apr 2007 Location: We-Go, Chi-Town, Ill
Posts: 2,550
|
Gru?
|
12-08-2011, 07:25 AM | #3 |
Quarry Creeper Join Date: May 2009 Location: Under Communist Occupation
Posts: 271
|
The HPI Gear Reduction Unit. If its the Glavnoye Razvedyvatel'noye Upravleniye, we are in trouble. |
12-08-2011, 07:27 AM | #4 |
I wanna be Dave Join Date: Sep 2011 Location: Douglassville, PA
Posts: 4,218
|
Running the stock 27t motor in mine. Works fine. I dont know that I'd go much lower turns-wise, the 27 works fine and the gearbox internals do not have bearings so you'd just be wearing things out with more RPM's. Use the pinion to gear up a bit if more speed is needed. the HPI GRU is SLOW, I bumped up a few teeth on the pinion.
|
12-09-2011, 11:30 AM | #5 |
Rock Stacker Join Date: Jun 2011 Location: girard
Posts: 81
| Gru
I also run the stock motor with the gru. Its acts like a drag brake and gear up for speed
|
12-09-2011, 08:12 PM | #6 |
REST IN ALOHA CHIP Join Date: Nov 2005 Location: *
Posts: 3,549
|
run the planetary type. it works good. rc4wd disruptor, tamiya cr01....
|
12-09-2011, 11:58 PM | #7 |
Quarry Creeper Join Date: May 2009 Location: Under Communist Occupation
Posts: 271
|
I want a brake on my trail truck. I have a 35t RC4WD can, and a Traxxas XL-5 esc. I am just wondering if anyone has gone down to 20ish, and what the speed is like. BTW: the GRU does have bearings. |
02-04-2012, 05:04 AM | #8 |
Newbie Join Date: Jan 2007 Location: INLAND EMPIRE
Posts: 9
| Re: Okay, GRU lovers need motor advice!
I know this is a little late, but I am just now reading this and just did this mod. We just put a 20t scorpion traxxas motor on my brothers ck that had an hpi 55t and GRU...way too slow. The 20t is nice, I have the 27t saturn and gru and will purchasing a 20t. The gru only has one or two small bearings inside, also the ck has all stock gears. One final note, the I had to cut the shaft on the traxxas motor to bale to use it on the GRU. I just referenced the length on the saturn motor. Hope this helps. |
02-08-2012, 01:19 AM | #9 |
Nope.. Join Date: Aug 2005 Location: Whiteland, Indiana
Posts: 1,849
| Re: Okay, GRU lovers need motor advice!
If you're doing all this motor swapping anyway why not just ditch the GRU and buy a 35,45 or 55 turn?
|
Thread Tools | |
Display Modes | |
| |