Oasis TR
Posts: 697
Joined: 11/17/2006
From: visalia,
CA, USA
Status: online
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Heres some info on diff tunning..
Buggy and truggy front (Bumps): You also have to consider how the diff affects the handling through bumps. Lighter oils (3,000wt buggy, 7,000wt truggy) are better for bumpy conditions. If the oil is too heavy it will make the car want to change direction or oversteer in the rough or rhythm sections.
Center Differential
Buggy and truggy: Lighter center oils help the buggy or truck track straight while accelerating (3,000-5,000wt buggy; 7,000-10,000wt truck). Running lighter oils in the center has a negative effect on the acceleration. The lighter oil allows the power to be directed toward the front of the car and hamper acceleration out of corners. If you're having trouble clearing jumps that are out of a slow corner, that could be a sign that the center diff is too light, but for really bumpy sections having lighter oil in the center will allow the car to accelerate better and straighter.
Rear Differential
Buggy and truggy: I don't adjust the rear too often, and if I do it's usually only in 1000wt increments. Lighter oil in the rear diff gives the vehicle more off-power steering, but can make the car or truck feel inconsistent around the track, especially in long main events. The majority of the time I will use 2,000 and 3,000 in the rear diff in both buggy and truck.
What to do..
...the track is rutty:
Buggy: Try changing the center to a lighter setting first (3,000-5,000wt); if the car is changing directions out of a bumpy corner, try making the front lighter (3,000-4000wt).
Truck: Same as buggy but the diff setting to try for the front (7,000wt) and for the center 7,000-15,000wt.
...the track is loose and smooth:
Buggy and truggy: The best way I've found to increase traction with the diffs is to increase the oil weight in the rear diff slightly -3,000-5,000wt.
...if the track is loose and rutty:
Buggy: A "square" diff setup here helps -5,000wt front, 5,000wt center and 3,000-5,000wt rear.
Truck: Lighter center and front -7,000wt front, 10,000wt center.
...the track is blue groove:
Buggy: Most of the time I run between 5,000-7,000wt in the front, and 7,000-10,000wt center.
Truck: Most of the time on blue groove the cars and trucks on throttle turn-in good because of the weight transfer to front tires, but you lose some steering coming out of the turn. So to sacrifice some turn in for out of the corner steering and acceleration, a heavier front and center is better suited majority of the time -20,000wt front, 30,000-50,000wt center.
...the track is blue groove and rutty:
Buggy: I would normally just go lighter in the center, but not too light (5,000wt)
Truck: Since most trucks handle the bumps I wouldn't change the diff settings from the smooth blue groove setup.
... I want more steering entering the turn:
Buggy: Lighter front oil (3,000wt) and rear (1,000wt)
Truck: Lighter front oil (5,000-7,000wt) and rear (1,000-2,000wt)
...I want more steering exiting:
Buggy: Thicker front oil -5,000-10,000wt
Truck: Thicker front oil-10,000-20,000wt
...I want more acceleration out of a turn:
Buggy: Thicker center oil - 7,000-10,000
Truck: Thicker center oil - 20,000-50,000wt
...I want it to go better through a rough section:
Buggy: Use thinner oil for the center (3,000-4000wt) and thinner oil for the front as well (3,000wt).
Truck: Use thinner oil for the center (7,000-10,000wt) and thinner oil for the front as well (5,000-7,000wt).
...it pulls around too much through ruts:
Buggy and truck: Usually this happens because the oil in the front and center differentials is too thick; reduce weights.
Starting Point
All this is worth nothing if you don't have a starting point. These are starting weights for a variety of conditions that will be good at most tracks.
Conclusion
Once you understand the principal of how a diff works and how different weight oils slow the action you will be a master tuner in a few short days. This doesn't mean that dropping 1,000wt in the front will make you a better driver. Learning how to drive is something that has to be done before you can fine tune to get the car to behave like you want.
< Message edited by Oasis TR -- 2/24/2008 3:43:19 AM >
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All Forums >> RC Cars, Buggies, Trucks, Tanks and more >> RC Truggy >> RE: ---OFFICIAL CASTER RACING K8T TRUGGY THREAD--- 
RE: ---OFFICIAL CASTER RACING K8T TRUGGY THREAD--- - 
