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Author Topic:   Roll center.........
odb93
Dirt Forum Champ
Total posts: 537
posted October 24, 2003 01:38 PM  
81 cutlass supreme with a 9in ford linked using the four stock trailing arms on the rear.

No pull bars or panhards.


Where are my front and rear roll centers?
How about center of gravity?

dode
Dirt Forum Champ
Total posts: 613
posted October 24, 2003 02:19 PM  
you'll probably have to get a good racing software program for your computer to find the exact locations be prepared to do alot of measuring CircleTrack magazine is supposed to be doing an article on the different programs avalible in the near future you might want to check it out if you are really interested

odb93
Dirt Forum Champ
Total posts: 537
posted October 25, 2003 08:59 AM  
Ok then.

Thanks guys.

Dode, what is the question.

What do you need to know.

Better yet, how can I measure it?

66jj
Dirt Forum Champ
Total posts: 823
posted October 25, 2003 10:55 AM  
i have steve smiths front end geometry pro, its great. you plug in all the measurements then you can change them in the program and see the results.


jay116
Dirt Freak

Total posts: 428
posted October 25, 2003 08:16 PM  
I have a 3D program, you need a few spare w/ends to get all of the measurements, it gets pretty involved, but the results at the track once you figure things out is well worth it.

Hutch5375
Dirt Maniac

Total posts: 123
posted November 24, 2003 05:36 PM  
A little advanced is ADAMS/car, it's a full blown simulation that takes into account many suspension variables suchs as camber gain, scrub radius, KPI, geometry, wheel loads, and various other inputs. Very useful when designing, but most of the stuff we deal with is done for us so it makes it much easier. However ADAMS is AWESOME with roll centers and CG with weight transfer. Another thing that we hardly touch on is compliance and I think we all can benefit from increasing the "harmony" in our suspension setups. I see a lot of mechanical drag with many cars that can be eliminated by simple calculations and geometry revisions.

Cheers

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