R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric Off-Road

Like Tree26Likes
Reply
 
Thread Tools Search this Thread
Old 10-01-2013, 04:31 AM   #12436
Tech Champion
R/C Tech Elite Subscriber
 
Join Date: Oct 2008
Location: Minnesota
Posts: 7,377
Trader Rating: 520 (100%+)
Default

If anyone on here has a used Dimec chassis that isnt all busted up you are not using or don't want, PM me I'd be willing to take it off your hands I'm experimenting with a lightweight stock setup, but I'm not sure the class is going to stick..
flame56mx is offline   Reply With Quote
Old 10-01-2013, 07:14 AM   #12437
Tech Elite
 
Join Date: Mar 2011
Location: Houston
Posts: 2,540
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by ridgeracer View Post
With the shorty pack all the way forward I still had less steering with the +8 dimec than with the battery all the way back in a short chassis.
This is a common misconception in rc car circles. More weight rearwards gives more steering. More weight forwards leads to understeer. If this doesn't hold true it's because something big is wrong with the setup.
__________________
Follow my rc products on Facebook at Raborn Racing Originals and the line of 3D printed parts at
http://www.shapeways.com/shops/rebellionrc
fredswain is offline   Reply With Quote
Old 10-01-2013, 08:32 AM   #12438
Tech Regular
 
Join Date: Jun 2010
Location: Norway
Posts: 340
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by fredswain View Post
This is a common misconception in rc car circles. More weight rearwards gives more steering. More weight forwards leads to understeer. If this doesn't hold true it's because something big is wrong with the setup.
I understand the "pushing" aspect, but why put weight at the front then ?
I tried the shortpack all the way back also in the +8 chassis, but that gave even less steering
__________________
My collection :
Durango DEX410/210, DEST410
Tamiya AVANTE, PORSCHE 934 1/10, DF03, TB EVO V, TB02, TRF414, TA04R, TRF501X, TRF511, TRF201, TT01210wb, TXT-1, TLT-1, CLOD BUSTER, TOP FORCE, MAZDA 787, RM-01 +++
KYOSHO INFERNO GT2, ST-RR VE, TURBO OPTIMA, OPTIMA MID LWB, ULTIMA +++
ridgeracer is offline   Reply With Quote
Old 10-01-2013, 09:00 AM   #12439
Tech Elite
 
Join Date: Mar 2011
Location: Houston
Posts: 2,540
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by ridgeracer View Post
I understand the "pushing" aspect, but why put weight at the front then ?
I tried the shortpack all the way back also in the +8 chassis, but that gave even less steering
You can't just shift weight and not completely retune everything. That is masking the problem. Assuming you had a balanced setup in the first place, and few people do or understand it, by moving that weight but not retuning you've completely changed that balance. You also change effective roll stiffness front to rear. I am a firm believer, and I don't care what "pro" disagrees with me, that you always tune for balance and that you never ever make a shock, spring, dampening change at one end and not the other. If you move weight around you absolutely must completely retune for balance or else you are changing too many variables to know what is really happening.
__________________
Follow my rc products on Facebook at Raborn Racing Originals and the line of 3D printed parts at
http://www.shapeways.com/shops/rebellionrc
fredswain is offline   Reply With Quote
Old 10-01-2013, 09:14 AM   #12440
Tech Regular
 
Join Date: Jun 2010
Location: Norway
Posts: 340
Trader Rating: 4 (100%+)
Default

Quote:
Originally Posted by fredswain View Post
You can't just shift weight and not completely retune everything. That is masking the problem. Assuming you had a balanced setup in the first place, and few people do or understand it, by moving that weight but not retuning you've completely changed that balance. You also change effective roll stiffness front to rear. I am a firm believer, and I don't care what "pro" disagrees with me, that you always tune for balance and that you never ever make a shock, spring, dampening change at one end and not the other. If you move weight around you absolutely must completely retune for balance or else you are changing too many variables to know what is really happening.
In my eyes you are changing only one variable if you are moving the battery, and if you are changing springs and oils at the same time you are changing many variables. Then you wont know what made it better or worse.
__________________
My collection :
Durango DEX410/210, DEST410
Tamiya AVANTE, PORSCHE 934 1/10, DF03, TB EVO V, TB02, TRF414, TA04R, TRF501X, TRF511, TRF201, TT01210wb, TXT-1, TLT-1, CLOD BUSTER, TOP FORCE, MAZDA 787, RM-01 +++
KYOSHO INFERNO GT2, ST-RR VE, TURBO OPTIMA, OPTIMA MID LWB, ULTIMA +++
ridgeracer is offline   Reply With Quote
Old 10-01-2013, 09:25 AM   #12441
Tech Elite
 
Join Date: Mar 2011
Location: Houston
Posts: 2,540
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by ridgeracer View Post
In my eyes you are changing only one variable if you are moving the battery, and if you are changing springs and oils at the same time you are changing many variables. Then you wont know what made it better or worse.
If you move weight, you have actually done many things. Your springs have leverage over mass. You've shifted that mass and hence shifted the leverage that the have. If all of your weight was over the front wheels on one setup and then over the back wheels on another setup but they used identical spring and shock settings, one end is going to rise fast on one car and the opposite will be true on the other. You've changed the wheel rate. As such you've also changed the roll stiffness as more mass at one end has more leverage to roll the car. You need to always maintain that effective balance. If you shift weight forwards but don't change anything else, you've also effectively decreased front roll stiffness and increased it at the rear. This is similar to adding a swaybar at the back which has the effect of increasing steering (by removing rear traction). That's why shifting weight forwards appears to give steering. It's not actually the weight that's doing it but rather a side effect. It changes other handling characteristics though. It is better to just change one variable but in order to do that, you have to retune everything which may sound weird. Keep in mind the only thing you'd need to change with a weight shift is spring rate. Dampening would not need to be touched.
__________________
Follow my rc products on Facebook at Raborn Racing Originals and the line of 3D printed parts at
http://www.shapeways.com/shops/rebellionrc
fredswain is offline   Reply With Quote
Old 10-01-2013, 12:54 PM   #12442
Tech Fanatic
 
RCworks216's Avatar
 
Join Date: Jan 2009
Location: Raleigh, NC
Posts: 808
Trader Rating: 26 (96%+)
Default

I'm new to 2wd and the dex210. I have an rtr but change it to mm 4 gear with the race chassis. What's a good starting point set up? Out the box it was loose in the rear. Trying new tires and maybe a rear weight for the next race.
__________________
Racer Distribution- trackside mobile hobby shop.
Tires, Kits, Bearings, Wheels, Oils, Servos, Engines,
RCworks216 is offline   Reply With Quote
Old 10-01-2013, 01:01 PM   #12443
Tech Master
 
Join Date: Apr 2010
Posts: 1,464
Trader Rating: 18 (100%+)
Default

What surface are you running on? MM4 is normally used on high bite surfaces.

Check out www.petitrc.com for setup sheets.
__________________
If you build it I will break it!
EB48.4 - B6 - B64 - TC7.1 - F6
iTz Nicholas72 is offline   Reply With Quote
Old 10-02-2013, 04:06 AM   #12444
Tech Regular
 
Join Date: Feb 2005
Location: iowa
Posts: 470
Trader Rating: 6 (100%+)
Default

does anyone know when the new car is do out ?
__________________
Mike Richardson
At the track having fun with my friends
blingy is offline   Reply With Quote
Old 10-02-2013, 04:20 AM   #12445
Tech Champion
R/C Tech Elite Subscriber
 
Join Date: Oct 2008
Location: Minnesota
Posts: 7,377
Trader Rating: 520 (100%+)
Default

Quote:
Originally Posted by blingy View Post
does anyone know when the new car is do out ?
Rumor has it february, but I havent seen or heard anything "official" as if yet..
flame56mx is offline   Reply With Quote
Old 10-02-2013, 06:17 AM   #12446
Tech Elite
 
Join Date: Oct 2012
Location: Naperville, IL
Posts: 3,647
Trader Rating: 57 (100%+)
Default

Quote:
Originally Posted by daveb View Post
That would be great...Since you are (2) hours ahead of me (UT), I can call in first thing and order it. If not...22 2.0 here I come....UGH and a lot more money.
Did this ever get worked out? I hear my LHS has a kit.
shagino is offline   Reply With Quote
Old 10-02-2013, 07:15 AM   #12447
Tech Addict
 
Join Date: Apr 2012
Location: Punxsutawney, Pa
Posts: 521
Trader Rating: 6 (100%+)
Default

what's the best go to for a MM4 set up for a med indoor track that runs slicks.
cripplethreat is offline   Reply With Quote
Old 10-02-2013, 07:49 AM   #12448
Tech Regular
 
Join Date: Apr 2004
Location: Stansbury Park, UT
Posts: 270
Trader Rating: 3 (100%+)
Default

Quote:
Originally Posted by shagino View Post
Did this ever get worked out? I hear my LHS has a kit.
I believe I found one and should be ordering it today. If not I may need the number to your local shop.
daveb is offline   Reply With Quote
Old 10-02-2013, 07:52 AM   #12449
Tech Addict
 
Join Date: Apr 2012
Location: Punxsutawney, Pa
Posts: 521
Trader Rating: 6 (100%+)
Default

Quote:
Originally Posted by daveb View Post
I believe I found one and should be ordering it today. If not I may need the number to your local shop.

It's not 139 anymore but tower has them for 249 on tower again
cripplethreat is offline   Reply With Quote
Old 10-02-2013, 10:19 AM   #12450
Tech Master
 
Brushless420's Avatar
 
Join Date: Mar 2011
Location: St.Pete, FL
Posts: 1,834
Trader Rating: 169 (100%+)
Default setup

Quote:
Originally Posted by cripplethreat View Post
what's the best go to for a MM4 set up for a med indoor track that runs slicks.
www.petitrc.com
Brushless420 is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
St Ives RC Club B4Bandit Australian Racing 16568 09-15-2017 05:07 AM
EPMTs check in here. (a subsidiary of TNT) overtki11 Singapore R/C Racers 55470 05-07-2017 11:57 PM
Team Durango DEX410 ASH93A Australian Racing 925 04-08-2013 09:51 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -7. It is currently 07:17 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net