Comments on: Anti Squat, Dive and Lift Geometry

By: John

John — Wed, 25 Oct 2023 21:58:02 +0000

Hello. Have enjoyed all the articles. Used the COG formula’s today on my Formula Vee. Question…my car uses a single trailing arm going to the rear and is level to ground. How would I work out rear anti squat with that design. Can find nothing on the web.

By: Suspension Secrets

Suspension Secrets — Fri, 21 May 2021 20:53:00 +0000

In reply to Ryan.

Hi Ryan, thanks for the comment. We can’t seem to find any reference to front to rear weight distribution split in this article. For calculating anti-lift and dive the centre of gravity height is the important factor as it is acting as a moment arm. The front to rear position of the COG isn’t a factor. We do discuss brake bias split which perhaps you have confused it for?

Thanks

By: Ryan

Ryan — Thu, 20 May 2021 15:23:24 +0000

Hi. Thanks for the great article! It did a lot to explain some factors of suspension geometry. Unfortunately it doesn’t seem to be universal across different types of vehicles. Im not a mathemetician but the equation doesn’t seem to take into account a weight distribution other than 50/50. In the case of a front engine American muscle car for instance you’d end up with a centre of gravity much closer to the front of the vehicle which, I would think, change the anti-squat characteristics. I totally understand that it may be difficult to make a simple equation that accounts for all the variables, but maybe a line in the article that mentions this equation is better suited to race cars or vehicles with a near 50/50 weight distribution. Thanks again!

By: Rochak

Rochak — Mon, 18 Jan 2021 19:40:32 +0000

Very informative! Can u make a blog on how actually these forces are distributed between the springs and the suspension arms when we have anti-geometry? Or if you could provide a source from where I can get this information!
Thanks!

By: Suspension Secrets

Suspension Secrets — Mon, 11 Jan 2021 13:28:35 +0000

In reply to slammo.

Hi thanks for the comment. Our equations and diagrams have been designed and labelled in order to match and work. The “L” that you are referring to is the “SVSA Length” which could be labeled with an L but as we use “L” for wheel base in all of our articles this could cause confusion. Therefore “L” is wheelbase in our equations but as long as you follow our equations and diagrams you will achieve the correct results.

Thanks

By: slammo

slammo — Sun, 10 Jan 2021 17:31:27 +0000

In the diagrams L is shown as the vehicle wheelbase, i.e. the distance from the front contact patch to the rear. To my understanding, shouldn’t L be the distance between the center of mass and the rear wheels?

By: Suspension Secrets

Suspension Secrets — Wed, 06 Jan 2021 10:31:51 +0000

In reply to ken snyder.

Hi Ken,

Have you taken a look at our two articles covering dampers?

https://suspensionsecrets.co.uk/dampers/

https://suspensionsecrets.co.uk/damper/

Thanks

By: ken snyder

ken snyder — Thu, 26 Nov 2020 20:42:24 +0000

Please explain the +’s and -‘s of single nee suspension . I have never seen anything wrote about it …

By: Yash

Yash — Wed, 06 May 2020 04:02:48 +0000

What is the percentages of anti-geometry in all terrain vehcles

By: Yash

Yash — Tue, 05 May 2020 12:23:18 +0000

What is the full form of SVSA

By: Suspension Secrets

Suspension Secrets — Mon, 18 Nov 2019 19:52:40 +0000

In reply to ChoiSejoon. HI Thanks for your comment. We have a seperate article covering roll centre and roll moment which will answer this question for you. Thanks

By: ChoiSejoon

ChoiSejoon — Mon, 18 Nov 2019 14:24:20 +0000

Hi. I got a question. I don’t know how to find roll center when I apply anti dive or anti squat suspension geometry…

By: Suspension Secrets

Suspension Secrets — Tue, 25 Jun 2019 21:34:03 +0000

In reply to Sank Bhai.

Hi Sank,

Please see our articles on calculating spring rates where we explain in depth the importance and relevance.

Thanks

By: Sank Bhai

Sank Bhai — Sun, 23 Jun 2019 11:27:04 +0000

Why natural frequency of a car is important?