BMAX2 MR bottoming out

[cpzao]

Hi,

I recently changed my dex210 to the Yokomo bmax2 MR. I really like how the car behaves in turns but I feel the car bottoming out (specially on the rear) landing on jumps making me waste a lot of time (my dex used to be so smooth). I am using the kit springs (blue and blue-long) and AE 35 shock oil and on the rear I tried the original pistons (1,3 mm holes I guess) and 2 holes with 1,7 and 1,5. Still haven't gone anywhere. Any ideas? Does this car need a heavier shock oil? Do i need to add some rebound? How much?

The only weight I added were 70g under the lipo.

Cheers.

[mes]

Pistons as per manual have way to little pack. Try the smallest kit pistons in the rear as a starting point. For detailed set-up advice you should ask around your local track.
If the shocks feel ok but the car bottoms out nontheless, you could put some old o-rings on the outside of the shock shafts similarly to the bump stops supplied with other cars (AE?). In the front, the car likes heavier oils, I am currently on 550 cst with 1.6 two-hole pistons, which is slightly heavier than AE 42.5 wt.

[cpzao]

Unfortunately there aren't many BMAX2 running around here.

Tracks on the region have jumps with very short receptions or no reception at all, so cars fly and land on flat ground.

Any suggestion for the rear?

[mes]

Difficult to say without knowing the track. Too heavy shock oil can make your car's handling erratic, but you'll need more pack than with the kit set-up for sure. Following your description I'd try the 1.5 pistons, 40 wt oil and some o-rings/bump stops on the outside the shocks for a start.

[Danosborne6661]

Too little pack if you're running that light an oil with those pistons. Try something like this, found it to be great on a bumpy astro-track with jumps. Still works fantastic on high-grip carpet tracks too, wouldn't change a thing!

Front: 35wt - #2 kit pistons, kit spring
Rear: 30wt - #1 kit pistons, lighter, associated white spring

[200sx]

I dont have this problem. On the rear I'm running kit springs, kit pistons, 27.5 ae oil, in on tower out on arms. No additional weight and shorty all the way back.