Dark Impact Too Slow?

[r6stu]

I cant seem to get my DI to go at any speed! My GH is mega fast with std gearing and a 15q motor in it and almost std as well. I have put a 17turn and a 15turn motor in the DI and tried lots of different gearing options and it stills seams bearly faster than with a tin can motor.

The DI is hopped up with alloy and carbon frame slipper clutch and stuff.

HELP

[Gruntfuggly]

Take the slipper back out, or tighten it right up and see if that makes a difference.

[cubsfan2009]

I run a Sidewinder 4600Kv in my DI which is about equivalent to a very good 12t motor and maxes at 34,000 rpm. It goes silly fast running 82t slipper (set with 1.5 mm of threads exposed) and 23t pinion. MY guess is your 17t motor should run 28,0000 rpm and the 15t should be about 31,000 rpm so waaaaaay faster than the stock 16,000 rpm silver can. Either motor would probably run right on the 23t pinion, maybe 25t pinion for the 17t motor.

Start by checking to see if the power is making it to the wheels by removing the spur/pinion cover and give it some throttle while holding it from moving on the ground. Ideally the tires should break traction and spin. If not see what is slipping. If pinion and spur spins easily then the slipper is installed wrong or set to loose. If the whole slipper shaft+spur+pinion turns easily then the ball diffs are set to loose. Also check your pinion mesh to make sure it's not to tight as this will cause alot of drag and slow it way down.

[r6stu]

I run a Sidewinder 4600Kv in my DI which is about equivalent to a very good 12t motor and maxes at 34,000 rpm. It goes silly fast running 82t slipper (set with 1.5 mm of threads exposed) and 23t pinion. MY guess is your 17t motor should run 28,0000 rpm and the 15t should be about 31,000 rpm so waaaaaay faster than the stock 16,000 rpm silver can. Either motor would probably run right on the 23t pinion, maybe 25t pinion for the 17t motor.

Start by checking to see if the power is making it to the wheels by removing the spur/pinion cover and give it some throttle while holding it from moving on the ground. Ideally the tires should break traction and spin. If not see what is slipping. If pinion and spur spins easily then the slipper is installed wrong or set to loose. If the whole slipper shaft+spur+pinion turns easily then the ball diffs are set to loose. Also check your pinion mesh to make sure it's not to tight as this will cause alot of drag and slow it way down.

Ill take a vid tom and post it up! I have stripped and rebuilt the car a few times now. I wonder if the ESC could be reducing the power to the motor?

It may have got wet ages ago i cant remember if that is the one that got hit by a wave on the beach/ lol

[phantom photon]

Have you tried different battery packs?

[TA-Mark]

Pinion/spur mesh. Too tight will do this. On the Grasshopper it's a set hole and you can't get it wrong. DF03 is a slot and will be binding on the backside of the tooth if too tight. You should be able to hold the pinion still and rock the spur.

Use 26/78 with the 17 turn, 25/82 with the 15 turn as base ratios.

[BUNGCHIDDI]

suffered the same thing on my df03 a few weeks back.....

Combination of 2 things in my case....i was runningn the 82/23 config but the gear mesh was too tight..TA-Mark told me to try the paper feed to set the gear mesh...also when i was running it with the shell on..the 4wd shaft was hitting the cover or battery conector wedged between shell and shaft..i couldnt see it when the cover was on..but when i took it off i noticed a score on the shaft. I wouldnt have though it could have reduced speed that much but it did........................also i knew something was up because my 1900mah battery was cooking afterwards...with tyhe motor working against a high resistance.

After i sorted it...she was flying again....just relaocate the ESC to the other side beside the steering servo and have the battery connector pop out that side....or do marks idea with keeping most of the bat cable in the bat compartment.

Inspect your shaft.........

[HereBeMonsters]

TA-Mark told me to try the paper feed to set the gear mesh

Wassat?

I cant seem to get my DI to go at any speed! My GH is mega fast with std gearing and a 15q motor in it and almost std as well. I have put a 17turn and a 15turn motor in the DI and tried lots of different gearing options and it stills seams bearly faster than with a tin can motor.

The DI is hopped up with alloy and carbon frame slipper clutch and stuff.

HELP

What sort of motors are they? I find my 15 Turn VERY cheap Ansmann motor makes the Hornet as fast as you like, but wouldn't even wheelie my VLB, or move my Manta Ray any faster than a standard motor. No torque.

[BUNGCHIDDI]

PUT PAPER BETWEEN SPUR AND PINION...AND MESH/SLIDE THEM UP....THEN WIND THE PAPER OUT, THUS LEAVES A VERY SMALL GAP BETWEEN SPUR & PINION SO ITS NOT TOO TIGHT AND MESHING GOOD.

Im running a 12T Corally in my DF03...its fast enough (say around 35kmh) but i wouldnt say silly fast....had it in my old hs2 and it was fast in that too.

[TA-Mark]

My Grasshopper does wheelies, let alone the Lunchbox. I can do a standing backflip with the Lunchbox. Both are the best chassis I ever run the Mamba in. System doesn't get hot, runs for what feels like forever on a Ni-MH, and it's a challenge to drive. All pluses that add up to big fun.

Thread where we discused gear mesh.

DF-03 begs to be driven fast. Goes right where you point it. Not as much of a challenge to drive as the same motor in a lesser chassis.

[r6stu]

PUT PAPER BETWEEN SPUR AND PINION...AND MESH/SLIDE THEM UP....THEN WIND THE PAPER OUT, THUS LEAVES A VERY SMALL GAP BETWEEN SPUR & PINION SO ITS NOT TOO TIGHT AND MESHING GOOD.

Im running a 12T Corally in my DF03...its fast enough (say around 35kmh) but i wouldnt say silly fast....had it in my old hs2 and it was fast in that too.

I always do that for my cars.

Heres a video of it.

Dark Impact Video

[TA-Mark]

I always do that for my cars.

Heres a video of it.

Dark Impact Video

Standard spur is vague, you get all 3 in the MS kit, 78t, 82t and 85t. Or you get the 78t and 85t in the normal kit and the 82t with the slipper set. 23/82 is the gearing I use for brushless.

The Dark Impact chassis does 28-30km/h with the silvercan and TEU-101BK built to the instructions (26/78 gears).

How much weight has the hopups added? That will slow the vehicle, and they are heavier. RTR with battery mine weighs 1595 grams (100% box stock - black one in my showroom).

Does the chassis roll extremely smooth with no motor fitted?

[terry.sc]

As Mark says it will go faster if it went on a diet and got rid of all the bling that won't help the performance, the extra weight just slows it down. The video also states that it's a Clash motor, not a proper 15 turn motor. They have very little torque so will give you the sort of performance you have there in a heavy 4wd buggy. The best use for a Clash is as a paperweight, being round they roll so aren't even good at that.

Put in a decent 19 turn motor like the Checkpoint Money or Reedy Challenger and you will see a good speed increase, put a decent 15 turn in there and it will fly if you adjust the gearing to match the motor.

[HereBeMonsters]

The best use for a Clash is as a paperweight, being round they roll so aren't even good at that.

In a light car, they're alright actually. Goes well in the Mini and the Hornet...not bad for the £3 I paid for mine!

[r6stu]

As Mark says it will go faster if it went on a diet and got rid of all the bling that won't help the performance, the extra weight just slows it down. The video also states that it's a Clash motor, not a proper 15 turn motor. They have very little torque so will give you the sort of performance you have there in a heavy 4wd buggy. The best use for a Clash is as a paperweight, being round they roll so aren't even good at that.

Put in a decent 19 turn motor like the Checkpoint Money or Reedy Challenger and you will see a good speed increase, put a decent 15 turn in there and it will fly if you adjust the gearing to match the motor.

the 17t is a mtroniks 17 triple. ill check the weight and spur later.

[r6stu]

Just weighed it in @ 1.7kg fully loaded. the gravel hound is 1.8kilos fully loaded so the DI is 100g lighter!

[TA-Mark]

You got hopups on the DF-02 as well? Mine is 1725 grams RTR. The heaviest of the Tamiya buggys is the DF-01 at 1735 grams. My hopped up DF-01 is 1885 grams. This is with a Ni-MH pack in them. Li-Po cuts about 200 grams.

[r6stu]

You got hopups on the DF-02 as well? Mine is 1725 grams RTR. The heaviest of the Tamiya buggys is the DF-01 at 1735 grams. My hopped up DF-01 is 1885 grams. This is with a Ni-MH pack in them. Li-Po cuts about 200 grams.

All thats on the df02 is alloy shocks and alloy stering block. rest is std. I use Vapotex 3700 cells and a 15 quad motor in that one, Oh I do have the alloy motor heat sink.