Shock Oil Recommendations Grasshopper H.p Rear Shocks

[teamnomad]

got some h.p rear shocks for my grasshopper and want to use silicone oil which weight would be recomended starting point (e.g 20wt etc) thanx

[stu22]

I think I put Associated 25wt in mine. The unfortunate truth is the suspension design is so bad that I don't think varying the weight of the oil would make much of a difference.

[teamnomad]

ok thanks making a ss replica will only be used occasionally wont be drivin it hard

[94eg!]

The unfortunate truth is the suspension design is so bad that I don't think varying the weight of the oil would make much of a difference.

BINGO!

[TA-Mark]

Very light oil and very light rear spring. Add some weight to the chassis just infront of the gearbox pivot will help the rear suspension to work as all the rear weight is unsprung in the gearbox and it will just bounce otherwise. Keeping the weight low will help with stability.

On mine, I have the CRP alloy dampers with the lightest spring they offer on the rear with Tamiya's lightest damper fluid. I have 250 grams of lead weight inside the spare tyre which is mounted to the rear rollcage above the rear suspension. My rear suspension does work and it does not bounce. I have also used the Hornet rolling rear suspension pivots.

[Mighty flex]

ta-mark,

did you find that handeling was better or worse using the small 20mm motors so as to reduce the unsprung weight? I realise this is a bit off topic but i guess its another way around the grasshopper handling

[TA-Mark]

ta-mark,

did you find that handeling was better or worse using the small 20mm motors so as to reduce the unsprung weight? I realise this is a bit off topic but i guess its another way around the grasshopper handling

When I first ran it as Mr Tamiya intended with the 380S and no modifications it was very slow with extremely poor handling and bounced everywhere. Suitable for a 5-7yr old at the speeds it travels at.

After the mods I've done it drives likes it's on rails with a 200 can brushless motor. But far too underpowered and slow for me.

I don't get any bouncing with the 'heavier than Mabuchi 540' brushless CM36 motor that is fitted. If I leave the weighted spare wheel off the roof it's almost uncontrollable and the rear end skips around all over the place. I have forgotten to refit the weighted wheel a few times and don't get far before realising and returning to the workshop to put it back on.

Very light spring and light oil and added weight is the only solution I've found to make this type of rear suspension work. I have the same theory fitted in my Lunchbox and DT01 with similar results in improved handling and rear suspension that works.

[94eg!]

After the mods I've done it drives likes it's on rails with a 200 can brushless motor.

This is a statement about the Grasshopper you could only find on Tamiyaclub...

[TA-Mark]

It's not really a Grasshopper anymore once you fit oil dampers and the Hornet rolling rear pivot blocks. Makes it a Hornet with a Grasshopper body really.

That said, it is extremely tame with the 200 can brushless motor. Barely enough power to make the Buggy Champ wheels slip. With the 4600Kv CM36S, if it were not stable, I wouldn't be able to get 55km/h out of it. It would bounce and tip over at speeds much lower than that on the surfaces I have to run on.