Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB

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-   -   Roll Center (https://www.ft86club.com/forums/showthread.php?t=120301)

bju90 07-13-2017 06:51 PM

Roll Center
 
Has anyone actually measured the roll center and CG heights (either stock or lowered)?

Thought it might be worth checking before I go measure myself.

JoeC 07-13-2017 07:14 PM

I assume roll center is the balance point of the car from the front to the back and the CG is the center of gravity from the ground to the roof. is that correct?

How would you go about measuring either of those?

Gunman 07-13-2017 07:40 PM

Quote:

Originally Posted by JoeC (Post 2945448)

How would you go about measuring either of those?

Roll center:
http://www.morsemeasurements.com/tec...-roll-centers/

Cg
http://www.longacreracing.com/techni...spx?item=42586

JoeC 07-13-2017 08:12 PM

thanks. some interesting reading there. The roll center is still over my head...

strat61caster 07-13-2017 08:34 PM

Quote:

Originally Posted by bju90 (Post 2945440)
Has anyone actually measured the roll center and CG heights (either stock or lowered)?

Thought it might be worth checking before I go measure myself.

http://www.ft86club.com/forums/showthread.php?t=26661

But I think it's worth checking yourself.

Gunman 07-13-2017 08:54 PM

Quote:

Originally Posted by JoeC (Post 2945479)
thanks. some interesting reading there. The roll center is still over my head...

https://en.wikipedia.org/wiki/Roll_center

Simply put, it is the point, or axis, that the car rolls around, when cornering. It gets more complicated, once you put dynamics into it, and the roll center starts to migrate.
http://www.joesracing.com/files/Know...er-diagram.jpg

Some suspension engineers design around it, others nearly ignore it. I've worked with both.

Scrappydoo 07-13-2017 10:30 PM

Quote:

Originally Posted by JoeC (Post 2945479)
thanks. some interesting reading there. The roll center is still over my head...

You small? :happyanim:


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