R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro On-Road

Reply
 
Thread Tools Search this Thread
Old 03-08-2006, 08:27 PM   #1
Tech Master
 
Quinton's Avatar
 
Join Date: Jun 2004
Location: Kansas
Posts: 1,561
Trader Rating: 2 (100%+)
Default Balancing out a car with scales?

I picked me up some scales today and weighed my car. It's off about 15grams left to right and about 70grams from front to back.

So how do I go about setting up my car? Do I got for equal weight at all 4 corners or...? I don't know the principles or philosophies of racing setups though.

Can some of you more experienced racers give me some tips?
Thank you!

(my rc18t is WAY off from left to right )
__________________
Retired Basher
Quinton is offline   Reply With Quote
Old 03-08-2006, 09:21 PM   #2
Tech Addict
 
Join Date: Jan 2006
Location: it's only illegal if you get caught!
Posts: 562
Default

i read somewhere that you balance the car out by adjusting the collar on the threaded shock body which also increses/decreases ride height.
ae_ntc3 is offline   Reply With Quote
Old 03-08-2006, 09:23 PM   #3
Tech Master
 
Quinton's Avatar
 
Join Date: Jun 2004
Location: Kansas
Posts: 1,561
Trader Rating: 2 (100%+)
Default

I don't mean balance as far as ride height, I mean balance as in it's off 60grams from left to right.
Just add lead weights? or what?
__________________
Retired Basher
Quinton is offline   Reply With Quote
Old 03-08-2006, 09:57 PM   #4
Tech Addict
 
Join Date: Jan 2006
Location: it's only illegal if you get caught!
Posts: 562
Default

i dont know why but it also adjust the weight. if you can imagine that on the left side of the car the ride height is 1mm and on the right side of the car the ride height is 10mm.this will put more weight over the left side of the car making it heavier.this applys front to rear and left to right.
ae_ntc3 is offline   Reply With Quote
Old 03-09-2006, 10:26 AM   #5
Tech Initiate
 
Join Date: Feb 2006
Posts: 49
Default

HI. Weight on each wheel will make a difference to handling but as standard the parts are usually arranged so that the car will be balanced as close as possible. I wouldnt worry too much about it. What car is it you have though?

ANd regarding adding weight to balance it out, dont. that may balance the car left to right but will decrease your cornering speed, acceleration and braking distance greatly. Keep your car as light as possible regardless of wieght distribution.
Ian C is offline   Reply With Quote
Old 03-09-2006, 11:04 AM   #6
Tech Adept
 
BimmerDriver's Avatar
 
Join Date: Apr 2004
Location: PA
Posts: 178
Default

Quinton, depending on your ride height, screw the spring adjuster up on the light wheel, or down on the heavy wheel. This will change the left/right balance of those wheels. Notice that when you jack weight in the left rear, you correspondingly add weight to the right front. Weight adjustments occur on the opposite side of the other end of the car. You may have to adjust the front springs to get the rear balance correct. Maybe you can slide your battery a little right/left, forward/back to get better balance, as well as your ESC and receiver.

For road course racing it is better to be as close to 50-50 split as possible, you need to make left and right turns. For ovals where you always turn left try to obtain more left side weight overall, but make the right rear a little heavier than the left rear. If the car oversteers, move the weight a little more to the left rear.
BimmerDriver is offline   Reply With Quote
Old 03-09-2006, 04:09 PM   #7
Tech Regular
 
Perez's Avatar
 
Join Date: Aug 2003
Location: Santa Cruz
Posts: 319
Trader Rating: 4 (100%+)
Default

We measure our 1/5th scale cars with scales and it really makes a difference. the first thing you want to do is take the sway bars off or disconnect them and make sure the ride heights are correct. Put the car on the scales. You can drive yourself crazy trying to get everything perfect, but you can get a good driving car if the weights are in the ball park. This is done by adjusting the shock collars, or adding weight. Sometimes when you adjust the front right shock, you might see a result of more weight on the rear left scale. Sometimes not. Just play around a bit till its close. I ve always worried about side to side weight rather than front to rear. So, after the weights are in order mark the position of the shock collars with a sharpie and reconnect the sway bars. the sway bars should not effect the weight distribution. If it does you got to tweak the swaybars. Take the car off of the scales and remeasure the ride heights. After adjusting the weight distribution with the shock collars, the ride height might be too high or too low. Use the marks on the shock collars and adjust the shock collars equally till you find the ride height you desire.
This isnt the only way to do this, My friend Eric P. always adjusts the weight distribution soley by tweaking the sway bars and not the shock collars. And he is the fastest 1/5th scale driver in the U.S.
so try it and report back
P.S. make sure the surface your doing this on is perfectly flat. Use a level.
Perez is offline   Reply With Quote
Old 03-09-2006, 04:33 PM   #8
Tech Addict
 
bsmooth's Avatar
 
Join Date: Oct 2002
Location: Rocklin, California
Posts: 630
Trader Rating: 17 (100%+)
Default

..I read in another forum that you should mark the scales so the tire sits exactly in the same place. If you picked the car up, then set it back down on the scales a few mm right or left, i'm sure you would get different weight readings.
bsmooth is offline   Reply With Quote
Old 03-09-2006, 06:26 PM   #9
Tech Master
 
Quinton's Avatar
 
Join Date: Jun 2004
Location: Kansas
Posts: 1,561
Trader Rating: 2 (100%+)
Default

I'm not going to get TOO picky I just wanted to get an idea off how the wieght was distributed on a couple of my r/c's.
My yokomo gt-4 is 325g and 340g on the fronts and
395g and 410g on the rears.
The lighter side has the fuel tank on it and it was empty so I don't think I will mess with it from left to right.

Now my rc18t is WAY off, 115g on the left and 60g on the right.
__________________
Retired Basher
Quinton is offline   Reply With Quote
Old 03-09-2006, 08:07 PM   #10
Tech Addict
 
Join Date: Jan 2006
Location: it's only illegal if you get caught!
Posts: 562
Default

Quote:
Originally Posted by bsmooth
..I read in another forum that you should mark the scales so the tire sits exactly in the same place. If you picked the car up, then set it back down on the scales a few mm right or left, i'm sure you would get different weight readings.
when i balanced my car i used longacre scales and it did not matter where i placed the wheel on the scale.i balanced a 1/10th nitro tourer and a 1/5th.
ae_ntc3 is offline   Reply With Quote
Old 03-09-2006, 08:11 PM   #11
Tech Master
 
Quinton's Avatar
 
Join Date: Jun 2004
Location: Kansas
Posts: 1,561
Trader Rating: 2 (100%+)
Default

I didn't want to fork out the dough for digital scales so I just went to Wally and got the cheap food scales.
I'ld like to weigh my 1/8 buggy and savage too but they're only 500gram scales.
I bet they could really benefit from some balancing.
__________________
Retired Basher
Quinton is offline   Reply With Quote
Old 03-10-2006, 05:31 AM   #12
Moderator
 
Artificial-I's Avatar
 
Join Date: Jan 2005
Location: Rurouni Kenshin
Posts: 3,459
Trader Rating: 17 (100%+)
Send a message via AIM to Artificial-I
Default

On the subject of scales. Has anyone used the Integy Weight Distribution system?
Artificial-I is offline   Reply With Quote
Old 03-10-2006, 06:15 AM   #13
Tech Champion
 
Slotmachine's Avatar
 
Join Date: May 2003
Location: Germantown Maryland
Posts: 5,699
Trader Rating: 4 (100%+)
Send a message via MSN to Slotmachine
Default

Quote:
Originally Posted by Quinton
I picked me up some scales today and weighed my car. It's off about 15grams left to right and about 70grams from front to back.

So how do I go about setting up my car? Do I got for equal weight at all 4 corners or...? I don't know the principles or philosophies of racing setups though.

Can some of you more experienced racers give me some tips?
Thank you!

(my rc18t is WAY off from left to right )
If you put your car back on the scales and adjust 1 shock collar 1/4 of a turn you will see how drastically the weight changes. You will not get the weight even front to rear , but you do want to get it even left to right. This will help to make the car handle equally in both left and right corners and it will help under braking making it stay in a straighter line.............
__________________
HOBBYWING NORTH AMERICA /FALCON SEKIDO/ TEKNO RC TEAM/VBC Racing America/VP-PRO RACING TIRES/2010 R.O.A.R. VTA National Champion Driving a T2R PRO/NANO-TECH Batteries Paul Rush
Slotmachine is offline   Reply With Quote
Old 03-10-2006, 07:03 AM   #14
Tech Master
 
Pyramid's Avatar
 
Join Date: Sep 2001
Location: ID
Posts: 1,945
Default

Quote:
Originally Posted by Quinton
I'm not going to get TOO picky I just wanted to get an idea off how the wieght was distributed on a couple of my r/c's.
I wrote some example about doing weight balancing. Just clik on the last line of my signature.
Pyramid is offline   Reply With Quote
Old 03-10-2006, 12:55 PM   #15
Tech Adept
 
Join Date: Oct 2003
Posts: 218
Trader Rating: 4 (83%+)
Default

Real race cars use scales to do corner weight. There are two ways to balance a car, by measurement or by weight.

Most nitro cars are fairly well balanced left to right by design. Using the Hudy droop guage with all shocks and sway bar disconnected and measure your droop are the same. Then connect your sway bar and use the linkage on sway bar to make sure they are equal on both sides. Next connect the shocks and put equal amount of preload on the shocks to get your desire ride height. Because by design they are balanced left to right, measurement will get you close to perfect.

On 5th scale or electric, the weight distribution are not that great left to right. You will need to use corner weight. Put the car on a Hudy jig first, slide scales under all 4 corners. Use spring preload to adjust until car is balance. The result is a car with different ride height left to right. Make sure you push the car down and measure on rebound.

Because of slops in suspension or bearings, it will be impossible to get it perfect.
slooookomo is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Do all Lipo's need balancing Mugenville Australian Racing 4 07-21-2008 05:35 AM
((Digital Scales for balancing weight and checking tweak.)) F. Mendoza R/C Items: For Sale/Trade 23 12-21-2007 03:47 AM
lipo balancing ? jbinny Electric Off-Road 8 10-14-2007 11:45 AM
wheel balancing pug 205 gti Electric On-Road 10 02-12-2007 06:16 PM
Chassis Balancing rcfiend Electric On-Road 7 06-14-2005 02:39 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 05:26 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net