Understanding Front Roll Centers Kinematic and Elastic on Your Race Car; Dirt Late Model & Dirt Mod

Let's talk about roll centers. I see roll centers a little differently than other people. I see two types of roll centers that probably need to work together.
For years I believed like many other people that there only was one type of roll center; until I went to a seminar put on by a Formula One engineer.
Now, I really don't pay too much attention to roll center.
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[@lonewolf1675]

I know this is an older video, but I am confused. Once the weight is transferred to the bump stop, why isn't the roll center moved back toward the left since the theory of the roll center moves toward the lighter side of the car? Thnx

[@HoganTechnologiesLLC]

Technically, yes. But by this time, I think the car has stopped rolling and is racing in more of a steady state.

[@TheCrewChief374]

This is a Pandora's Box for a lot of people. Since as you pointed out there are a lot of different perspectives on this topic.
Yet with that said, I have worked on racecars for 35 plus years, much like yourself and have heard a lot of different variance of this subject myself.
Which all I can say is you just have to put the information out there. Then let folks make up there own minds, on the subject.
Because next to politicians, lawyers, and bureaucrats. People in racing can be a thickle crowd and eat you alive if they don't like what you have to say...
At least that has been my experience on the entire subject of sharing what I know, even though my trade as a mechanic in top tier shops has been nearly as long as my time working on racecars.

[@HoganTechnologiesLLC]

Thank you for watching. Yes, there are a ton of opinions. Maybe it will spur some thought and keep some people's minds moving.

[@TheCrewChief374]

@@HoganTechnologiesLLC Yes I agree. Because it is always good to have something in the mental toolbox, that a person can apply to a car that needs some help.
Needless to say, the longer I have been around dirt track racing. The more I know that it is important to keep learning and never stay static, in what you know. Besides, like I have heard Bill Frye state in an interview recently. If you are not thinking ahead, you are being left behind.

[@jumpshotkangaroo7585]

Would you apply this to an asphalt late model? My rules dont allow me to run bump stops but i am just starting to get into roll centers so im taking everything in!

[@HoganTechnologiesLLC]

I would assume it would be close to the same but not as extreme. Bumpsteer on asphalt I always heard was as close to zero as you can get it. Ackerman might want to get closer to the running radius of the corner to eliminate scrub.

[@christopherdowning7776]

It really depends on race series… if your race series regulations heavily regulate shocks but roll centers and springs are open, then that’s where you need to spend the time and money.. great video though.

[@HoganTechnologiesLLC]

Thanks for watching.

[@lancejohnson5748]

Your a small guy thanks 🙏 I understand

[@HoganTechnologiesLLC]

Thank you for watching.

[@lancejohnson5748]

Smart

[@HoganTechnologiesLLC]

@@lancejohnson5748 Thank you for watching.