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Author Topic:   roll center
GRTWallbanger
Dirt Maniac

Total posts: 196
posted October 12, 2004 06:21 PM  
WHen using the roll center calculator in the tool box can somebody explain what is meant when they want the car raised up and then measure the adjusted wheel base?If i jack the car up under the rear when it is on scales the lr will be way lower than the rr?What do I measure??and how high do I jack it?

paulickr
Dirt Maniac

Total posts: 110
posted October 13, 2004 10:52 AM  
NOT SURE BUT I THINK THE REFERENCE IS TO THE AMOUNT THAT THE REAREND MOVES FORWORD CAUSING REAR SREER WHEN JACKED UP ON THE DRIVERS SIDE.

GRTWallbanger
Dirt Maniac

Total posts: 196
posted October 13, 2004 12:01 PM  
So you only measure off the driver side?For both wheel base measurments?

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted October 13, 2004 12:22 PM  
Your talking center of gravity not roll center right?

What they want you to do is put the jack under the center of the rear pumpkin and raise the car 24" then measure the wheelbase from center of the rear end to the front wheels. An easier (and safer) way would be to do it mathematically. Try this formula AWB=square root of(OWB squared-H squared) Where OWB=original wheelbase, H=height you raise the car and AWB will equal the new 'adjusted' wheelbase EX. original wheelbase is 110", height raised is 24". 110 squared-24 squared =11524, square root of 11524 is 107.3 which is the adjusted wheelbase. Input that number as needed.

paulickr
Dirt Maniac

Total posts: 110
posted October 14, 2004 10:52 AM  
dirt buster............whew.........you are my hero.
what are you man? a math major?
good job!!!

jammin
Dirt Administrator

Total posts: 6243
posted October 14, 2004 08:09 PM  
Center of Gravity Calculator in toolbox.

jam

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