ezrun questions

Old 10-20-2009, 01:06 AM
  #1  
Tech Rookie
Thread Starter
 
1freddy's Avatar
 
Join Date: Oct 2009
Location: santa ana
Posts: 18
Questions?? ezrun questions

hey everyone new to this forum.

i have been reading about the ezrun brushless combo for a while now
i have a XX4 should i get a 5.5t motor or a 8.5 and what type of gearing??
i plan on taking it to a local indoor track would the 5.5 be to much for the track?


here is a pic of my truck hope you guys like it.



were can i find a back up body??
Attached Thumbnails ezrun questions-img00571.jpg  
1freddy is offline  
Old 10-20-2009, 08:40 AM
  #2  
Tech Elite
iTrader: (211)
 
Neu_Racer's Avatar
 
Join Date: Sep 2009
Location: Pacific NW
Posts: 4,012
Trader Rating: 211 (100%+)
Default

Originally Posted by 1freddy View Post
hey everyone new to this forum.

i have been reading about the ezrun brushless combo for a while now
i have a XX4 should i get a 5.5t motor or a 8.5 and what type of gearing??
i plan on taking it to a local indoor track would the 5.5 be to much for the track?


here is a pic of my truck hope you guys like it.



were can i find a back up body??
Unless you are running a huge 1/8 outdoor track a 5.5T is way too much. Even an 8.5T is a little overkill but would be fun.

EZRuns have good reps, never used one myself. If the wallet can take it, get the Tekin RS 8.5T-10.5T combo. You won't be sorry.

That truck is pretty awesome. What body is that?
Neu_Racer is offline  
Old 10-20-2009, 09:12 AM
  #3  
Tech Elite
iTrader: (42)
 
Join Date: Jun 2008
Location: anywhere I can race 2wd dirt,and 1/12 onroad in MI.
Posts: 3,864
Trader Rating: 42 (100%+)
Default

XX-4 on a indoor track the 8.5 will be more than enough.I do run ez-run speedo's.they are bullet proof.
2wdMod is offline  
Old 10-20-2009, 10:32 AM
  #4  
Tech Adept
iTrader: (11)
 
Join Date: Mar 2008
Location: San Clemente
Posts: 231
Trader Rating: 11 (100%+)
Default

Go with the Hobbywing XE Run 60 amp ESC if you are going that route. For $80 it is an awesome controller, and firmware upgradeable. It is the same thing as the Speed Passion V.2 controllers. Then you can run a nice sensored motor as well. I ran the EZ Run for a while, and I liked it, but now that I got the XE Run I will never look back.
TYLORD is offline  
Old 10-20-2009, 06:46 PM
  #5  
Tech Elite
iTrader: (13)
 
tom_chang79's Avatar
 
Join Date: Jul 2008
Location: Southern California
Posts: 2,591
Trader Rating: 13 (100%+)
Default

I would definitely get the 8.5 given the two choices...

Just for relative comparison, my B44 has a 5700Kv (Castle), which is somewhere between 5 to 6 turns. My DF-03 has a 4300Kv (Hobbywing) which is somewhere between 8 to 10 turns.

The B44 was BALLISTIC. Had to turn the timing down on the ESC to the lowest setting. My DF-03 feels just fine...

Truthfully, many of the guys that run 1/10th 4wd run 10.5s or 13.5s. They are full of torque, and 4wd can use a lot of torque to get over the initial force caused by friction due to having a larger load (two gearboxes versus one).
tom_chang79 is offline  
Old 10-20-2009, 09:59 PM
  #6  
Tech Addict
iTrader: (34)
 
Join Date: Jul 2004
Posts: 641
Trader Rating: 34 (100%+)
Arrow WE'RE DONE HERE.

Originally Posted by tom_chang79 View Post
I would definitely get the 8.5 given the two choices...

Just for relative comparison, my B44 has a 5700Kv (Castle), which is somewhere between 5 to 6 turns. My DF-03 has a 4300Kv (Hobbywing) which is somewhere between 8 to 10 turns.

The B44 was BALLISTIC. Had to turn the timing down on the ESC to the lowest setting. My DF-03 feels just fine...

Truthfully, many of the guys that run 1/10th 4wd run 10.5s or 13.5s. They are full of torque, and 4wd can use a lot of torque to get over the initial force caused by friction due to having a larger load (two gearboxes versus one).
-------^^^^^^---------
Experienced spot on advice. There's no need to wait for others.
don74 is offline  
Old 10-20-2009, 10:22 PM
  #7  
Tech Master
iTrader: (9)
 
Super Steve's Avatar
 
Join Date: Oct 2003
Location: Toronto, Ontario, Canada
Posts: 1,179
Trader Rating: 9 (100%+)
Default

Originally Posted by tom_chang79 View Post
Just for relative comparison, my B44 has a 5700Kv (Castle), which is somewhere between 5 to 6 turns. My DF-03 has a 4300Kv (Hobbywing) which is somewhere between 8 to 10 turns.
You are alittle off,
4300 is closer to 19t brushed or 10.5t brushless and 5700 is closer to 12T brushed or 7.5brushless
Super Steve is offline  
Old 10-20-2009, 11:17 PM
  #8  
Tech Elite
iTrader: (13)
 
tom_chang79's Avatar
 
Join Date: Jul 2008
Location: Southern California
Posts: 2,591
Trader Rating: 13 (100%+)
Default

Super Steve, I've always thought that the Kv rating of various motor manufacturers varied from factory to factory when comparing it to "turn" based motor?
tom_chang79 is offline  
Old 10-20-2009, 11:32 PM
  #9  
Tech Addict
iTrader: (34)
 
Join Date: Jul 2004
Posts: 641
Trader Rating: 34 (100%+)
Arrow 380 VS 540 Size

Just a heads up guys.

I've actually examined these EZrun motors up close. Note that EZrun full turn motors, e.g. 9T, 13T, etc. are actually 380-400 size heavily finned bl motors that appear to be 540 size motors due to the exterior dimensions of their motor cans/casings. Their smaller and lighter rotors are the reason why they require only 35 amp ESC's. For the same reasons, the 9T(4300kv) spins faster than the 8.5T(4000kv). It also follows that given the same or similar kv, a bigger and heavier rotor will produce more torque than a smaller and lighter one.

Given the same application, it would be erroneous to compare EZruns' 9T motor to their 8.5T motor.
don74 is offline  
Old 10-20-2009, 11:37 PM
  #10  
Tech Elite
iTrader: (35)
 
y2kgtp's Avatar
 
Join Date: Sep 2008
Location: Deltona, FL
Posts: 2,559
Trader Rating: 35 (100%+)
Default

Losi's seem to have a Lower Kv rating compared to their turn ratings, I have noticed.....
y2kgtp is offline  
Old 10-21-2009, 12:03 AM
  #11  
Tech Master
iTrader: (36)
 
ZERTA RACING's Avatar
 
Join Date: Apr 2007
Location: San Diego
Posts: 1,236
Trader Rating: 36 (100%+)
Default

Originally Posted by tom_chang79 View Post
Super Steve, I've always thought that the Kv rating of various motor manufacturers varied from factory to factory when comparing it to "turn" based motor?

actually steve is right the novak ballistic 7.5 is 5900kv
ZERTA RACING is offline  
Old 10-21-2009, 01:24 AM
  #12  
Tech Elite
iTrader: (13)
 
tom_chang79's Avatar
 
Join Date: Jul 2008
Location: Southern California
Posts: 2,591
Trader Rating: 13 (100%+)
Default

Originally Posted by don74 View Post
Just a heads up guys.

I've actually examined these EZrun motors up close. Note that EZrun full turn motors, e.g. 9T, 13T, etc. are actually 380-400 size heavily finned bl motors that appear to be 540 size motors due to the exterior dimensions of their motor cans/casings. Their smaller and lighter rotors are the reason why they require only 35 amp ESC's. For the same reasons, the 9T(4300kv) spins faster than the 8.5T(4000kv). It also follows that given the same or similar kv, a bigger and heavier rotor will produce more torque than a smaller and lighter one.

Given the same application, it would be erroneous to compare EZruns' 9T motor to their 8.5T motor.

Wait a minute, the motor I have in my DF-03MS, which is a 4300Kv motor that came with the Ezrun V2 60A combo is a 380-size? Even with the fins, it doesn't seem like a 380, certainly the torque is there, it's almost as fast on the top-end speed as the previous motor, Castle's 4600Kv, and with slightly more torque... Note that I didn't change the gear ratio after the motor swap, left the same pinion/spur in my buggy... The 4300Kv just feels better, but it really feels like it belongs in my SC10 since the 4600Kv is in my SC10 now and it's too much of a motor...

Zerta: I don't think Novak's chart can be applied to every motor manufacturer's motors... You should check out Tekins, completely off-scale compared to Novak's.
tom_chang79 is offline  
Old 10-21-2009, 02:58 AM
  #13  
Tech Addict
iTrader: (34)
 
Join Date: Jul 2004
Posts: 641
Trader Rating: 34 (100%+)
Arrow

Originally Posted by tom_chang79 View Post
Wait a minute, the motor I have in my DF-03MS, which is a 4300Kv motor that came with the Ezrun V2 60A combo is a 380-size? Even with the fins, it doesn't seem like a 380, certainly the torque is there, it's almost as fast on the top-end speed as the previous motor, Castle's 4600Kv, and with slightly more torque... Note that I didn't change the gear ratio after the motor swap, left the same pinion/spur in my buggy... The 4300Kv just feels better, but it really feels like it belongs in my SC10 since the 4600Kv is in my SC10 now and it's too much of a motor...

Zerta: I don't think Novak's chart can be applied to every motor manufacturer's motors... You should check out Tekins, completely off-scale compared to Novak's.
If you have the deeply ribbed EZrun motor like that pictured in the upper portion of the page in this link-
http://www.hobbywing.com/english/Art...?ArticleID=426
then yes it would be a 380 size motor. The most powerful 380 sized brushless motor I have used but a 380 sized motor nonetheless. Note that in the link it shows in the "Main Applications" section that the full turn ribbed motors are for 1/12-1/10 On-road use.

An EZrun 380 size motor will certainly run much better when paired to a 60A ESC rather than the 35A ESC that it was originally offered with. These 380 size motors will struggle when installed in the heavier trucks where true 540 size motors are required.

No worries though for you since it appears that you're enjoying a "freak" 380 size brushless motor.
don74 is offline  
Old 10-21-2009, 07:23 AM
  #14  
Tech Master
iTrader: (9)
 
Super Steve's Avatar
 
Join Date: Oct 2003
Location: Toronto, Ontario, Canada
Posts: 1,179
Trader Rating: 9 (100%+)
Default

Originally Posted by tom_chang79 View Post
Wait a minute, the motor I have in my DF-03MS, which is a 4300Kv motor that came with the Ezrun V2 60A combo is a 380-size? Even with the fins, it doesn't seem like a 380, certainly the torque is there, it's almost as fast on the top-end speed as the previous motor, Castle's 4600Kv, and with slightly more torque... Note that I didn't change the gear ratio after the motor swap, left the same pinion/spur in my buggy... The 4300Kv just feels better, but it really feels like it belongs in my SC10 since the 4600Kv is in my SC10 now and it's too much of a motor...

Zerta: I don't think Novak's chart can be applied to every motor manufacturer's motors... You should check out Tekins, completely off-scale compared to Novak's.
Data on Novak's chart is comparable to other ROAR-legal sensored brushless. I cant seem to find any chart on Tekin except for their sensorless brushless.
Super Steve is offline  
Old 10-23-2009, 09:35 PM
  #15  
Tech Master
iTrader: (2)
 
Quinton's Avatar
 
Join Date: Jun 2004
Location: Kansas
Posts: 1,561
Trader Rating: 2 (100%+)
Default

I read up on the ezrun's wherever I could before ordering. I just wanted something cheap that would make my cheap Evader scoot along better than a 19t motor. So I got the 35A 9T version.
I am VERY HAPPY with how fast and torquey it is! I've only ran a half pack thru of my 6 & 7 cell battery to try it out this evening, but so far it is GREAT.

Anyone know why the directions state the fan won't work with a 7 cell battery? It worked the little I used it.
Quinton is offline  

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.