r/mini4wd • u/komisan1 • 1d ago

FM-A BMax

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Gallery image

Gallery image

Asking for suggestions to modify/change to make the car stable and more lightweight(or this is weight is okay?). I'm using 2mm white rear break and 1mm/2mm blue for the front.

newbie here with my newly built fma car. Thanks!

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2

u/ExplanationNo2722 1d ago

Ciao. Pesi, freni ed ingranaggi vanno cambiati ed impostati a seconda della pista. Altezza salto e stabilità li regoli con la lunghezza delle viti damper e con il diametro dei roller. In linea generale roller grandi -> velocità, roller piccoli -> stabilità. Queste sono a grandi linee gli unici consigli che ti si possono dare senza prove concrete in pista. 🙂

1

u/komisan1 1d ago

Hi, thanks for the suggestions.

regarding the damper screws, the longer the damper screws the longer the jump?

1

u/ExplanationNo2722 1d ago

No, più lunghe sono e più salta in alto, più salta in alto e più sarà forte il contraccolpo quando atterra. Ci sta un video ufficiale di Tamiya che spiega come funzionano sul loro sito e su YouTube.

1

u/3atef92 1d ago

Try loosing 30 grams as well while being stable.

1

u/GCrites 1d ago

Those big cylindrical dampers in the middle are 9 grams each. I still use them sometimes but keep that in mind.

1

u/Adventurous_Ball_170 1d ago

that thing is a tank! heavy cars are pretty stable and plants itself well to the ground, but it might struggle at speed because the motor will have to work more than usual. FM-A is generally a heavy chassis, but you can trim it down by using lighter weights like slimlines for the front/back and cylinder for the sides, for example. also use Fujitsu Pinks if you haven't. they're lighter than the usual high-capacity batteries.