When you see a machine on track that's working well, you never know what's underneath.
Something I learned a long time ago from Kondo-san. Plastic can still be fantastic.
My FD3s is is a little tunable with aero. Removable duck tail wing and diffuser make a reasonable difference.
But a change to a rear suspension setting based around geometric roll centre has transformed the Plastic DP-RT from a skatey machine that struggle for traction into a weapon.
In the top chassis picture, the angle of the rear arms aid in locating the roll centre and keeping the shocks inboard also allow a pivot. These are things anyone can play with. A top mount on it's own did not promote enough roll. You can also see that as yet, springs are not yet tuned exactly, but results are already awesome.
Target is a return to full plastic. Nervis motor mount will be moved and a cheap plastic one will be installed and rear Shock tower is also just a temporary front item stolen from my FR-D.
My other roll based chassis is mechanically linked by a system of belcranks to opposing knuckle top, but effectively is similar.
This has been giving mixed results as I search a setting where the front and rear match. Rear gets a lot of squat and traction preventing front grip and steering.
I'm currently using a Kazama based GSX-R chassis which has very central suspension arm mounts and large wide knuckles but not necessarily what I am after.
So in the next few days, I'm moving to a near Overdose Silver SSG chassis and eventually I'll try a few other items. Out with Kazama ... in with another dose of Overdose.
Overdose Dori Pake Suspension Parts already acquired on my last Japan trip will finally get installed. GSX-R chassis plates and Sus arms will be put up for sale.
So next time you see some close battles, you'd better check underneath.