Corner Balance #'s
04-09-2012, 04:24 PM
#1
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Corner Balance #'s
I just had my GT3 corner balanced and the tech came up with this as an end result... Is it a good start? He used ~230lb weight in the driver's seat.
04-09-2012, 05:15 PM
#2
FL: 674 FR: 648
RL: 1071 RR: 1001
Cross: 1675 (49.35%)| 1719 (50.6%)
[Cross weight is 44 lbs off]
3394 lbs total
-td
04-09-2012, 09:54 PM
#3
Rennlist Member
3500lbs with you guys in the car??? porkey!
looks good for heavy set cars
cross weights are the most important and your front to back is not that bad for a rear engined car at all.
a good set of tires and that weight might not even feel like its there!
looks good for heavy set cars
cross weights are the most important and your front to back is not that bad for a rear engined car at all.a good set of tires and that weight might not even feel like its there!
), but thanks for the rest of the feedback Sir!
04-10-2012, 01:08 PM
#6
I only know about trying to go for 50/50 cross. Can you tell us about some other strategies and what those strategies try and accomplish? when for example is is better to lighten up on the ideal 50/50 cross and equalized the weights on the LF and RF corner for example or equalize the rears?
04-10-2012, 01:11 PM
#7
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Adam -- What are some of the other strategies and compromises?
...I had always thought the idea was the split the cars weight amougst the wheels as evenly as possible. Personally I don't like to think of cross % when I do it. I just calcluate what a corners weight should be and adjust from there -- example: left side of car weighs 51.3% of total weight, front weighs 42.1% of total weight so Left-Front should bear total weight X 51.3% X 42.1%
...I had always thought the idea was the split the cars weight amougst the wheels as evenly as possible. Personally I don't like to think of cross % when I do it. I just calcluate what a corners weight should be and adjust from there -- example: left side of car weighs 51.3% of total weight, front weighs 42.1% of total weight so Left-Front should bear total weight X 51.3% X 42.1%
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04-10-2012, 02:29 PM
#9
Getting cross weights the same leaves you with a car that will behave the same in left and right hand corners. This is the method most of the tuners I am familiar with use.
Some tuners like to get the weight on the front tires the same. The idea being that maximum braking can be achieved since both front tires will be equally loaded. Since, under braking, load transfers to the front through the cg which is usually offset the vehicle center line, this does not always workout as expected.
Oval racing has its own requirements that I know little to nothing about.
Scott
Some tuners like to get the weight on the front tires the same. The idea being that maximum braking can be achieved since both front tires will be equally loaded. Since, under braking, load transfers to the front through the cg which is usually offset the vehicle center line, this does not always workout as expected.
Oval racing has its own requirements that I know little to nothing about.
Scott
04-10-2012, 05:03 PM
#11
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if you post the actual weights, i can help you with what direction to go with optimizing. you can still keep cross weights even, but optimize left to right weights. the trade offs happen when you raise and lower diagnal shock and body height. as you raise a corner, you increase pressure on that corner. (its weight goes up). you lower the opposing corner, and that weght goes down. in the end, you get the side to side weights in order. however, its not that easy because you are changing other things too.
but, for small changes, the concepts will work to being an out of balance car, in balance. 50 50 cornerweights dont do you much good, if you have a 100lb heavier corner. what i described will help you fix that kind of issue. then, the limits become what the ride height looks like too. all a delicate balance.
but, for small changes, the concepts will work to being an out of balance car, in balance. 50 50 cornerweights dont do you much good, if you have a 100lb heavier corner. what i described will help you fix that kind of issue. then, the limits become what the ride height looks like too. all a delicate balance.
04-10-2012, 05:32 PM
#12
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Adam -- What are some of the other strategies and compromises?
...I had always thought the idea was the split the cars weight amougst the wheels as evenly as possible. Personally I don't like to think of cross % when I do it. I just calcluate what a corners weight should be and adjust from there -- example: left side of car weighs 51.3% of total weight, front weighs 42.1% of total weight so Left-Front should bear total weight X 51.3% X 42.1%
...I had always thought the idea was the split the cars weight amougst the wheels as evenly as possible. Personally I don't like to think of cross % when I do it. I just calcluate what a corners weight should be and adjust from there -- example: left side of car weighs 51.3% of total weight, front weighs 42.1% of total weight so Left-Front should bear total weight X 51.3% X 42.1%
An article I wrote YEARS ago with the calculations and more info:
http://www.pelicanparts.com/techarti...nment_tips.htm
04-10-2012, 06:02 PM
#13
Rennlist Member
Just for comparison sake, I corner balanced my 944 the other day and came up with:
Front left: 680.8; front right: 644.8; rear left: 695.2; rear right: 656.4; total: 2,677.2
That's 50/50 front/back and 51/49 left/right.
Front left: 680.8; front right: 644.8; rear left: 695.2; rear right: 656.4; total: 2,677.2
That's 50/50 front/back and 51/49 left/right.
