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Old 05-29-2014, 10:18 PM   #1
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Default Does anyone corner weight there car

So still chasing my mi5 handling problems I scaled it out and got some strange numbers tell me what you think Lf 279gm rf 250gm lr 275gm rr308gm Ride hight is even with no chassis tweek
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Old 05-29-2014, 10:23 PM   #2
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Better pic of layout
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Old 05-29-2014, 10:57 PM   #3
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When I corner weigh my car, I try to get the weight difference down under 10grams between left and right side, either front or rear. This keeps the cross weight somewhat equal...
Example: lf(275g) ; rf(281g) ; lr(280g) ; rr(285g)...
Also, I remove the vehicle from the scales, press on the suspension and replace the vehicle on the scales many times until I get a consistant balanced reading within 10grams... I would say that your lf/rr crossweight is alot more than your rf/lr: 587g vs 525g.....
Also, if I can't get them under 10grams on both front and rear, I always try to get the rear close, and sacrifice the front. That really happens only when I run a very light battery pack, and heavy electronics...

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Old 05-29-2014, 11:10 PM   #4
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I looks like I just need to move the bat forwerd but I'm having rear grip problems is the balance more inportend ?
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Old 05-29-2014, 11:18 PM   #5
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I think the balance is more important, and should be changed with the shock collars rather than moving the battery. Your electronics/battery look fine. The battery wire needs to be secured, and you should be good to go...
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Old 05-30-2014, 03:57 AM   #6
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Quote:
Originally Posted by Larrysraceprep View Post
So still chasing my mi5 handling problems I scaled it out and got some strange numbers tell me what you think Lf 279gm rf 250gm lr 275gm rr308gm Ride hight is even with no chassis tweek
Not sure on the mi5 but i found my car balances best with stock battery placement. And you have to make sure your scales are calibrated as well as using Sr up wheels and make sure the droop is even as well as the shock collars all the way around. Try and balance the car with electronics then if you need to add wright. In the center. You should be able to get it fairly close. Also make sure the car is tweek free.
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Old 05-30-2014, 04:27 AM   #7
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The purpose of corner-weighting is to remove any tweak left in springs/bulkheads/arms/chassis etc. You can never completely remove it from the parts themselves, as everything in manufacturing has tolerances.

The amount of tweak you're showing (~30g) isn't unusual. Just adjust the RF and LR shock collars down about half a turn (or a bit more if needed) until the tweak is gone.
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Old 05-30-2014, 05:14 AM   #8
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The mention of calibrating the scales is very important. I have never seen a pair that out of the box were matched. Do this by swapping out the scales on one corner of the car and recording the readings. The scale that reads light will need shimming up in height until it matches the other scale. If you are using four scales repeat that until all four read the same on the same corner of the car.
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Old 05-30-2014, 09:26 AM   #9
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It's also very important to disconnect your sway bars when adjusting corner weights. Otherwise you'll preload your swaybars and it'll make the corner weight adjustments act funny.

Once you're adjusted your corner weights by adjusting the shock collars, reconnect the swaybars with the car on the scales. If the corner weights change, your swaybar is preloaded or twisted. Adjust the length of the sway bar links until you can disconnect/reconnect the swaybar (you only need to do one side of the swaybar) and the corner weights stay the same.

Hope this helps.

Mark

EDIT: also do your corner weighting with the body on. Very rarely is the body perfectly balanced L/R and F/R, especially if you've added shoe goo and reinforcing tape.
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Old 05-30-2014, 11:33 AM   #10
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I use the hudy pins to get the car left to right balanced by moving electronics etc around and then corner balance as then I know it is tweak/shock and not weight
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Old 05-30-2014, 11:43 AM   #11
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best scales ever


http://www.ohiohobbyplus.com/index.p...product_id=227
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Old 05-30-2014, 11:49 AM   #12
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Quote:
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my longacre scales for the big race car dont cost much more lol
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Old 05-30-2014, 11:59 AM   #13
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Make sure your battery wires dont contact the top deck, that could cause some tweak that would unbalance the car.
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Old 05-30-2014, 01:30 PM   #14
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This may be a dumb question, but what is the difference between corner balancing with scales and using a tweak board? I mean other than having actual numbers to factor in when using scales?
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Old 05-30-2014, 02:08 PM   #15
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It may also be worth going through the droop settings, spring preload and shock lengths. Put it on a setup jig and check the front and rear toe settings. If its a bumpy track, maybe soften the springs and shock oil?
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