Brandon none taken. You have a legitimate reason to question as to why you want to go to a setup similar to that of the D09. Well, I'm not primarily focused on setting the D10 up to be like the D09, but rather sort out the low roll centers to be within those of other popular touring car chassis.

That said, after measuring and comparing roll centers with other popular chassis on the market today, I noticed the D10 was lower than all others.

To give you an idea of what I'm talking about. Let's use these chassis for comparison.
The lowest measured roll center point for the

Xray T4 '16 is 6.65 mm and Xray T4 '17 is 6.3

Yokomo BD7 '16 is 7.5 mm

VBC D09 6.1 mm VBC D10 is 6.0 mm


In my opinion, the Xray chassis are what I consider the bench mark for roll center positions. As I've listed above the '16 and '17 lowest roll center heights have changed slightly, but for the most part these two chassis perform really well on both carpet and asphalt.

Taking a look at the BD7 '16 you can see the lowest roll center point is a lot higher than others. When drivers first used this chassis they had to use 3 mm inner camber link shims with tall ball studs (*A). This allowed them to achieve roll center positions that were similar to their competitors. Later on down the road Yokomo Europe came out with -1.0 mm suspension blocks to bring the roll center point from 7.5 mm to 6.5 mm (B). Which as we know is roughly what Xray is using on their chassis.

(A)http://site.petitrc.com/reglages/yok...ena2015112829/
(B)Team Yokomo BD7'16 - 1.0mm Lowered Suspension Mounts

With the VBC D10 most of you don't know this but both the D09 and (D10 black) suspension blocks are -0.5 mm lower than the standard D08 silver blocks. This further lowers the roll center position from what a lot of manufactures are currently using. I would say, it's safe to say that a good starting roll center position is around 6.3mm ~ 6.5mm. Why does this matter? Well, the suspension geometry is greatly affected around the lower hinge pin height, and this in turn will affect how the roll center and camber gain will work with each other. This relationship between the two is important to get right and that is why Yokomo had to take extreme measures to get this roll center / camber gain relationship to work the BD7 '16. The D09's roll center height is only 0.1 mm different, which yields a slight difference in roll center positions, but the biggest factor between the two VBC chassis is the suspension arms. The D09 suspension arm pin to pin front is 52.75 mm and rear is 54.3 mm. This difference in length between the front and rear suspension arms is common with most if not all manufactures. However, the D10 now uses identical length suspension arms at 53.00 mm pin to pin for the front and rear which has affected the roll center positions between both ends of the car. Also there are few other suspension parameters that change the roll center position, but I won't go into detail about it.

That is why I suggest trying out these settings I posted previously above. You can try or not. Just something for you think about. I'll admit I haven't tried what I've mentioned in my previous post, however, my D10 setup at 2017 AOC Yatabe isn't too far off from what I'm suggesting.

VBC Racing WildFire D10 - Edward Pickering - AOC - Yatabe Arena - 24-26.11.2017