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Old 11-27-2016 | 11:02 PM
  #136  
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Originally Posted by slowrider
hey, teeforb, did you manage to put in the hw xr8 (plus?) with the hw truggy motor?
Yep! Just a few mm space between the motor and esc.
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Old 11-27-2016 | 11:05 PM
  #137  
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Originally Posted by teeforb
This thing wheelie like crazy! I hope the longer chassis reduce the wheelies.
That's the point of the Short Wheelbase MT.
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Old 11-28-2016 | 03:43 AM
  #138  
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Originally Posted by teeforb
This thing wheelie like crazy! I hope the longer chassis reduce the wheelies.
Can't diff tuning dial some of that in or out?

Seems the oils chosen for the kit setup are designed to induce wheelies, no?

10K front
10K center
5k rear

Like the kit truggy setup should reduce that. No reason at all it needs to wheelie violently on throttle (unless that's your intent), that is completely tunable with a 4WD chassis. Short wheelbase or not. 1/8th buggys don't wheelie on throttle.

Last edited by celt; 11-28-2016 at 04:04 AM.
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Old 11-28-2016 | 09:17 AM
  #139  
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Originally Posted by celt
Can't diff tuning dial some of that in or out?

Seems the oils chosen for the kit setup are designed to induce wheelies, no?

10K front
10K center
5k rear

Like the kit truggy setup should reduce that. No reason at all it needs to wheelie violently on throttle (unless that's your intent), that is completely tunable with a 4WD chassis. Short wheelbase or not. 1/8th buggys don't wheelie on throttle.
Probably!
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Old 11-28-2016 | 09:29 AM
  #140  
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Originally Posted by celt
Can't diff tuning dial some of that in or out?

Seems the oils chosen for the kit setup are designed to induce wheelies, no?

10K front
10K center
5k rear

Like the kit truggy setup should reduce that. No reason at all it needs to wheelie violently on throttle (unless that's your intent), that is completely tunable with a 4WD chassis. Short wheelbase or not. 1/8th buggys don't wheelie on throttle.
Still learning about diff fluids. MT Truggies seem to run 250k plus in the center but I am not sure why. Thicker fluid makes it wheelie less? Wheelies are cool and all but only when you stab full throttle I would think.

If thicker fluid makes it wheelie less than using the stock fluids it would be something like this as a starting point?

100k Front
250k Center
50k Rear
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Old 11-28-2016 | 09:51 AM
  #141  
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Originally Posted by cmbscx10
Still learning about diff fluids. MT Truggies seem to run 250k plus in the center but I am not sure why. Thicker fluid makes it wheelie less? Wheelies are cool and all but only when you stab full throttle I would think.

If thicker fluid makes it wheelie less than using the stock fluids it would be something like this as a starting point?

100k Front
250k Center
50k Rear
The way I understand it, thicker diff oil makes wheelies more common, especially in the CD. This is why racers use much thinner oils, like ~10k instead of ~100-500k in their CD.
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Old 11-28-2016 | 10:49 AM
  #142  
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Thicker center oil will mean the truck will have a tendency to wheelie more. The kit says to build the diffs 100k-100k-50k, F-C-R. If you're driving on looser terrain dropping the diffs will improve handling to a point. If you go too low in the diffs the truck will become "grabby" and diff out in turns, it will feel inconsistent. The lowest I would run the front is 10k, center 15k, rear 7k, but that's the lowest. I prefer thicker diff fluids in all of my race cars so I would never run my MT diffs that light, I'd probably stay above 20-20-20 in every situation.
Another thing to consider is the size/weight of the tires. Bigger heavier tires are going to require heavier fluids to feel the same as lighter tires. The bigger tire usually has more traction, more traction means thicker diffs. There's more rotating mass with the bigger tires so when a tire diffs out and they get going they really spool up - thicker fluid helps keep that under control. Another thing is since thicker fluid means less diff action, there's less heat buildup in the diff. You're diffs will last longer between rebuilds with thicker fluids.

Changing diff oil is a fairly quick and easy adjustment (especially the center) so it's worth trying out to see how the car feels.
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Old 11-28-2016 | 11:05 AM
  #143  
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Yes I agree with you Matthew...

What does thicker diff oil in front do?
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Old 11-28-2016 | 11:27 AM
  #144  
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here's a good link.

http://www.neobuggy.net/the-setup-guide/differentials/
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Old 11-28-2016 | 12:58 PM
  #145  
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Here's one from Tekno as well:

http://www.teknorc.com/wp-content/up...t_Up_Guide.pdf
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Old 11-28-2016 | 01:05 PM
  #146  
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Originally Posted by celt
Can't diff tuning dial some of that in or out?

Seems the oils chosen for the kit setup are designed to induce wheelies, no?

10K front
10K center
5k rear

Like the kit truggy setup should reduce that. No reason at all it needs to wheelie violently on throttle (unless that's your intent), that is completely tunable with a 4WD chassis. Short wheelbase or not. 1/8th buggys don't wheelie on throttle.
Diff tuning may help.

But, it comes down to the tire selection. The smaller the tire, less wheelies. The larger MT tires provide incredible wheelie action. But either way. Wheelies are just part of the nature of this MT. Unless you run a 2s or 3s. 4s-6s=wheelies.
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Old 11-28-2016 | 01:35 PM
  #147  
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100k in the center is going to promote wheelies, if you want to calm it down you could go down to 30k.
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Old 11-28-2016 | 01:52 PM
  #148  
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For me, thanks for all the info so far. I better understand the fluid thickness now. I will be running TA Rival tires as I have them sitting here and start with the stock fluid weights and tune down from there.

Has anyone who's running played with the WB yet? Not truggy chassis but the stock chassis WB with the spacers.
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Old 11-29-2016 | 10:24 AM
  #149  
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+ YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.
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Old 11-29-2016 | 11:46 AM
  #150  
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Nice video, clever to compare it directly with Outcast. The 3.8 Badlands look pretty good on it, maybe even better than the Outcast-size tires; with all the mega tire suggestions I was afraid the 3.8s would look too small on it, but I like the look. Remaining question now becomes... does it stunt?
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