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Locating front roll center

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Locating front roll center

RM65 RM65
I watched NASCAR once | Posts: 1 | Joined: 07/07
Posted: 07/02/07
08:42 PM

I had a computer program for locating the roll center, but i lost it. And now i dont know what to measure. Can anyone tell me or show me a diagram of what measurements i need to find the front roll center?


36Dwarf 36Dwarf
I watched NASCAR once | Posts: 1 | Joined: 07/07
Posted: 07/31/07
07:09 AM

One of the many great things about this Magazine is that they post articles online. I found the answers to your questions here on the site.

Here is another good diagram:


Roho Roho
I watched NASCAR once | Posts: 2 | Joined: 02/08
Posted: 02/23/08
04:15 PM

I got one for you. Where can I find how to calculate MC on a Mustang Ministock Macphereson strut type suspension?  

CtTech CtTech
I watched NASCAR once | Posts: 23 | Joined: 11/07
Posted: 06/05/08
05:03 AM

MacPherson struts are a special case in calculating the Moment Center. And thanks for using the more technically correct terminology. The upper line in the drawing out of the MC is an extention of the top of the strut at a right angle, or 90 degrees from the centerline of the strut towards the inside of the car.

This line intersects a line drawn through the center of rotation of the lower ball joint through the center of the connecting link to the chassis of the lower control arm. Where thses two lines intersect is the Instant Center. As the car moves through dive and roll, the upper line remains perpendicular to the strut.

If you need software, several companies offer geometry software to calculate the strut MC. Try Autoware or Performance Trends.  

bspike40 bspike40
I watched NASCAR once | Posts: 10 | Joined: 03/08
Posted: 08/17/08
07:21 PM

If you go to my website I have a sheet which you can download and print for rollcenter measurements. If you need further assistance I have a roll center program available at Coleman Racing Products. Brian Ross Ross Engineering. email