LegendsRacer - Legends & Bandolero Racing Forum

LEGENDS => Setup and Handling => Topic started by: CC57 on November 28, 2007, 07:55:43 am

Title: Center of Gravity Height
Post by: CC57 on November 28, 2007, 07:55:43 am

I'm performing some roll center and general suspension calculations.

Does anyone on this board happen to know or have a general idea of what the center of gravity height is for these cars?

Thanks in advance.

Title: Re: Center of Gravity Height
Post by: justfreaky on November 28, 2007, 10:52:29 am

CGH Guidelines:
 For paved track cars - between 14 and 15 inches.
 For dirt track cars - between 15 and 16.5 inches.

 Hope that helps.

 Steve

Title: Re: Center of Gravity Height
Post by: justfreaky on November 28, 2007, 12:16:08 pm

 Some great resource material:
  Work Book For Advanced Race Car Suspension
  Racer's Math Handbook

 Computer Programs:
  Computerized Chassis Set-Up
  Racing Chassis Analysis


 If you don't have scales, and want to approximate CGH;
Measure from the center line of the crank-shaft to the ground. This should be a close approximation to the CGH.



 Good Luck,

  Steve

Title: Re: Center of Gravity Height
Post by: CC57 on November 29, 2007, 06:56:24 pm

I'll probaly use 14.5" for my calculations.

I'm currently attending a suspension seminar. Most of the instruction is patterned round full size cars (Late Models, Modifieds, Street Stocks, etc.).

Anyway, the interesting point is the instructor said to use 15" as CGH in his formulas. So I guess it (CGH) isn't too dependent on the size of the car.

And thanks for your reply.

Title: Re: Center of Gravity Height
Post by: justfreaky on November 30, 2007, 02:24:57 am

 All the formulas apply, regardless of the size or type of  car.
If you are going to run pavement, get the center of gravity as low as possible.
Talk to the instructor and pose your specific needs. He should be able to help you out a lot.

 Best Of Luck!

 Steve

Title: Re: Center of Gravity Height
Post by: pegalis on January 05, 2008, 04:50:53 pm

*Chuckles*  Oh boy!  Roll center, Anti-squat, CG, Roll Axis etc. etc.  There are tons of books on this stuff that will make your head explode. :)
Performance Trends inc.  makes a four link calculator program that you can download a trail version of.  It also does 3 link.
With this program you can type in some measurments of your car and get exact points of CG, Roll center and anti-squat.

I dont have the website on hand, but a quick google search may net you this program.   

Title: Re: Center of Gravity Height
Post by: MegaMang on January 05, 2008, 11:52:51 pm

Performance Trends 4 Link Calculator...

http://www.performancetrends.com/4link.htm
Mike :)