So after building the JJ I decided to do a bit of tinkering to it to better suit my home track, RCM, which is high grip grey carpet.
I used the Turbo Scorpion wheels with JC fuzz bite tires. Front wheels i cut off the inside bead and left the inner rib to fit the skinnier front tires.
From the factory, the front track width is way narrower than the rear. While NVR makes longer axles to fix this I went a different route. Back when I bought one of my Losi JRXs it had these, incorrect, Andy's front arms. They were too tight for the losi and didn't have the right geometry but they happen to fit this Ultima perfectly and widens the track to just about where i want it. Original arms are 56mm. Andy's arms are 62mm. Increasing track width by 12mm. The down side is I lose the ability to use the optional front sway bars without modification.
I ordered up some P.A.P. Towers from Factory works, did a little surgery to the body so it would fit, I already messed it up a bit anyway by not understanding how the rear transmission mounted wing worked. Note that this rere Ultima uses 3mm hardware in place of the original smaller hardware used for the camber links. I still need to fit the front but the rear one offers a lot of tuning options.
Springs I might have to do some fiddling with after testing. Rears are the stiff gold ones that are supposedly for the Scorpion, but I found to be too long to use on that car at the ride height I wanted. The fronts are a pair of LC racing ones I had in my pit box. both are a bit stiffer than the originals.
Alignment time - starting off with -2deg camber all around and 1deg of toe out up front.
Electronics I went with a basic Hobbywing Justock ESC. I would have used a Tekin but both of my Tekins are dead right now and awaiting repair. For the motor I picked up a used Trinity Monster Max 17.5t at least it's still a Trinity Monster right? Radio gear is the same stuff I use in my other rides Spektrum DX5R with a Blue MX SR3100 Rx.
Servo is a Savox SC-1258TG with a front cover from a 1268SG. Front cover on the 1258 is prone to having the center bushing area break out and causing the servo to lock up. The 1268 cover is much stronger in that area and fits without modification.
I use shorty lipo batteries and mounted this one fully forward. While the supplied Kyosho straps are pretty, the rough side of them is exposed on the button of the chassis and I really don't want velcro grabbing onto the carpet if it bottoms out. So i went with a cable management velcro strap so the fuzzy side is only exposed and not prone to catching onto things and there's no buckle to break. I may make some hold down tabs later and remove the strap altogether.
I also added some lexan tabs with velcro to help keep the body on and straight. Rear wing is actually a JRX-Pro wing that I had laying around and decided to make some clear endplates for it to emulate the original replica.
Ready for some testing and tuning
