For you mbx-5T owners....what diff fluid are you using
 

I am targeting the Mugen owners specifically as I recently bought a Mugen truggy.

I am thinking of: 7F 15-30C 5R

I did do a truggy diff search and came up w/ alot of different set ups....so, this is why I am targeting Mugen owners

Good bad?

20-20-5
slipperential in center
for very aggressive driving style

used to run 7-17-3 - not bad either

I am only basing w/no sliperential...so your second set up would be good?

for bashing go with thicker diffs so 20-20-5 will work well

Excellent...thanks!:yes::mdr:

just dont forget that oil won't last forever so you need to check it/replace it every few hours of runtime :)

Funny you should mention that....on my mbx-5 buggy, my diff fluid seems to last forever. In my friends koysho, he needs to do twice the maintenance I do....go figure

I'm gonna run 5K in the center for racing. Not sure on the front and rear yet.

5 in the center seems a tad light to me even for racing, but, seeing as I an new to truggies, I could be wrong

I saw another guy running 5K in the center. I thought the same thing...but I guess I won't know til I try :mdr:

I might go 10K just because I don't have a clutch and it's direct drive. Hmmm...

I know that buggies/truggies are different, but before running BL in my mbx-5, I was running 7k in the center....after the conversion, I went up to 15 and it was perfect. I was thinking along the same lines for the truggies.

Then I'm slapping in 10K for now. I think that's the highest I got at the moment. Need to stock up on MOAR.

what are the pros and cons of
a-heavier oil in the center
b-lighter oil in the rear
c-heavier oil in the front?

i am ballooning my front tires pretty badly and find my 5t doesnt turn in very well.

DIFF OIL
THICKNESS CHARACTERISTICS
Front
Thinner
• Increases steering into corners (off-power)
• If oil is too thin the steering may become inconsistent,
especially it can lose forward traction (and steering)
during acceleration out of corners
Thicker
• Increases stability into corners during braking
• Increases steering on-power at corner exit
Center
Thinner
• Front wheels unload more during acceleration
• Decreases on-power steering (reduces oversteer)
• Easier to drive on rough tracks
• If a high-power engine is used you could waste too
much power and sometime “cook” the oil in the center
differential because it “overloads”
• More off-power steering
Thicker
• More all-wheel drive effect
• Better acceleration
• Increases on-power steering (reduces understeer)
• Better suited on high-bite, smooth tracks
• Car can be more nervous to drive especially if a high
power engine is used - you might need to be smooth on
the throttle
Rear
Thinner
• Increases cornering traction
• Increases steering into corner
Thicker
• Decreases rear traction while cornering
• Reduces wheelspin

That is a great explination and should be posted as a sticky somewhere!

It's taken from HUDY offroad setup manual that is available for download on xray forums.

I sent a pm to one of the mods to put that info into a sticky for everyone to use..

Sorry for taking so long to check in to this thread but here's what I *think* I'm running in my MBX-5T, I'll double check later.

Front: 10k
Center: 100k
Rear: 7k

All fluids are Associated Silicone Diff Fluid.

I only run mine for bashing and I've found that putting 100k in the center was probably the single biggest improvement I have made.

Bashing Pros:
-Explosive grip/acceleration means I can get a really big air off of jumps even with only a few feet of running space to gain speed.
-Fun on loose surfaces since you can get some nice powerslides going.
-Much easier to do a rolling wheelie if I want to.

If you ever want to see how mine handles let me know, we're both on Cape Cod after all.

I went thicker in my center, I think it was 40. I can't remember right now but it seemed to give the truck better control, stability, and overall drive. I still need to tune it and try some different setups so I'll let you guys know what I come up with.

Little update...

I've gotten some wheel time on the Mugen ever since I went with truggy as my only class. On small tracks, a smaller car is ideal, 1/8 buggy is tight, truggy is pushing it and I generally don't race on the small tracks anymore.

However, I brought my truggy home with me and the track down here is HUGE. I had the fastest lap time in the first heat of racing yesterday and the truggy did great. It actually felt really good and pretty stable with the way I have it now. I want to get a little more steering so I might go down in fluid up front but I'm not sure what's up there right now. I want to try 10K and see how that does. I could also tear apart the rear and put some 5K in there - opinions? Thoughts?

would thicker or thinner oil decrease tire ballooning? have adjusted trottle curve so ballooning is less but it is still happening 3/4 down back straight or if i give it a little to much to quickly out of corners.

Thicker in the center so it will transfer more energy to the back tires.

i am running 15000 f,50000c 7000r and it still balloons.

What's your setup? Post your specs from front to back and be specific :)

15000 front,50000 centre and 7000 rear.

Wow :surprised:. I think that's too thick for a truggy setup. I'm running 7K front, 30K center, and 5K rear on my truggy.

:lol:

Post your brushless setup - motor, speedo, batts, gearing, tires, wheels, etc etc.

With too thick oil in the center the car will lift up the front end a lot when accelerating, which will balloon the front wheels and need a really gentle throttle finger. On the other hand, really light oil will cause most of the power to be unloaded to the front wheels, which will again balloon the fronts and also rob the car of acceleration.

The thing to remember is, you WILL have some ballooning when running WOT, but if it gets really bad, it may be because your car is over geared. And if that's the case, you could gear for lower top speed (which will cause wheels to rotate slower and hence balloon less) or do something like taping up the tires on the inside so they don't balloon.:wink:

I've had the opposite effect for me and my front and rear tires have the same amount of minimal ballooning, especially after going to thicker in the center.

I also limit my front droop, which keeps the tires planted and the weight balanced for good acceleration.

Are you still running the 10k center oil? I was talking more about 50k and higher when I mentioned thick oil in the center. I'm currently running 7k in my center, but that's just because I like the front wheel drive action I get from it. Personally I wouldn't go higher than 20k in the center when racing.

The front droop is a very good point too. I also found the car has better on power steering when I limit the front droop.

Ah, I see. I put in 30K I believe, which has been much better. My front and rear probably needs more fluid, it's about time for a change. I want to put 10K in the front and like 4 or 5K in the rear. I was also thinking about 7K up front, I'm not sure which would be better.

It's going to be different with each setup. I run a direct drive setup with motor brakes and a slight drag brake so I don't have to slow down much using the trigger in corners. The droop helped tremendously. My front end was so high when accelerating that I could hardly control where the truck was going when on power in corners. This is the first 1/8 scale that I've actually fine tuned for racing, so it's been a fun learning experience.

Put 7K in front and 5K in the rear, seems to be awesome. Won the electric 1/8 main tonight :)

Congrats!!! That's what I run on my ST RR. What do you have in your CD?

Well done! Sounds like you've got the setup sorted then.:party:

Thanks guys! I believe I'm running 30K in the center, I'll have to look again since I can't remember. I think this is the setup to have in this truck for my driving style, which is pretty aggressive and I like to drift around corners sometimes. Drag brakes help too :mdr:

Pic of the track I was on...very big to me-

http://img.photobucket.com/albums/v2...G0016small.jpg

That's a nice big track!

Yep, let's me get wide open on the throttle in a few places, I love it! I need to buy more batts though, running 4s 5000 packs only gives me about 12 min runtime on a track this size.

Looks like an awesome track! I'm pretty sure I've seen videos on youtube from this track... How long was your final?

Well done! I have changed my diff settings around/experimented and settled w/ 20F 20C 7R. Almost no unloading and since I don't race it works well.