DB01R dampeners bottoms out

[kolbaldt]

Hi!

Just finished my build of the Tamiya DB01R, and it is running GREAT, but
i have a "minor" problem with the dampeners bottoms out?
Im mainly driving on a skateboard track, and when duing jumps, it really lands hard (bottom badly scratched as a proof)
Im using the kit set springs (light blue) and kit set oil (soft)
I have adjusted the coilovers so i have max airgab underneath but im still hitting.
What would be my next step? harder springs/oli? or what else can i do to prevent this?

regards michael

[5POINTSTAR]

Sounds like chassis slap, common when not running on a proper track eventhough it can happen on a prepped track. Chassis slap happens when you go too big on a jump.

[Carno]

Originally Posted by kolbaldt

Im using the kit set springs (light blue) and kit set oil (soft)

Kit springs are actually red and yellow. Check for the dots on the bottom or top.

[kolbaldt]

Sounds about right, but how to stop it the easyist/cheapst way

[kolbaldt]

Hmm, there where only this color supplyed with the kit (remember it is the trf 501 dampeners on the DB01R)


QUOTE=Carno;356961]Kit springs are actually red and yellow. Check for the dots on the bottom or top.[/QUOTE]

[Carno]

Originally Posted by kolbaldt

Hmm, there where only this color supplyed with the kit (remember it is the trf 501 dampeners on the DB01R)

Yeah i know the overall color is light blue but there are dots of paint on the springs that show what stiffnes they are.
Red - soft
Yellow - medium
Blue - hard
If i recall correctly it's yellow in front and red in the rear.

[kolbaldt]

ohh i see :-)
yes you are right about that!

Front: light blue/yellow = medium
Rear:Light blue/Red = soft

but the dampner fluid i used is "soft" will it help if i used another kind?

regard michael

[Jamesk]

Ive put 80 weight oil in my shocks and that helps but i still think the set is to soft for my liking. My next plan is to maybe use some hi cap dampers ive got sitting around.
jk

[Migs]

in short, a harder spring and a thicker oil will help reduce the chassis slapping on the ground

[94eg!]

Originally Posted by Migs

in short, a harder spring and a thicker oil will help reduce the chassis slapping on the ground

It will also reduce overall grip...

Have you tried adjusting the amount of oil inside your dampers? Bleed the air out and set the oil up so the shock gets stiffer as fluid pressure builds at the end of their stroke. If you too much air inside the dampers, it will blow past the piston at the end of it's stroke causing the dampers to soften before the chassis hits. This is will happen no matter what oil weight you use. You need to tap the bleed holes in the damper caps and use the bleed screw to remove the air and adjust the oil level inside. It will take some trial and error, but it will be a better than switching to stiffer overall setup...

Just make sure you don't have so much oil inside that you cannot fully compress the damper...

[ScottyP]

Originally Posted by 94eg!

It will also reduce overall grip...

Heaven forbid he gets out-accelerated by a skateboard!

[Migs]

Originally Posted by ScottyP

Heaven forbid he gets out-accelerated by a skateboard!

haha exactly

[kolbaldt]

Hi!
Thanks for the replys, just tryed different oil levels, but even when i fill them all the way up so i can compress them fully is still get "chassie slap" i i drop the car from 0,5 Meter.
Must admit i still havent drilled out the caps to bleed out the air, but rear elsewhere it was not nessesury?

regards michael

[5POINTSTAR]

Originally Posted by kolbaldt

Hi!
Thanks for the replys, just tryed different oil levels, but even when i fill them all the way up so i can compress them fully is still get "chassie slap" i i drop the car from 0,5 Meter.
Must admit i still havent drilled out the caps to bleed out the air, but rear elsewhere it was not nessesury?

regards michael

Micheal, your gonna get chassis slap when running a performance 4WD buggy (unless you use crazy hard springs). Just the way it is .

[Migs]

dont bother drilling out the bleed holes, put on the stiffest spring, put in thicker oils and raise your ride height, 5pointstar is right, it will be hard to totally eliminate chassis slap, but hard springs, thick oil, raised ride height should help reduce it a fair bit while ur running it around on the skateboard park

[Fredrik Emilsson]

Remember that the suspension is supposed to absorb the "shock", not move that "energy" to the shock mounts and suspension arms...
Too thick oil and hard springs will be like jumping of a roof and land with stiff legs...

[mof]

Chassis slap is better than shock tower snap.

[Migs]

Originally Posted by mof

Chassis slap is better than shock tower snap.

hey that rhymes mof, ur a poet and didnt know it