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Old 07-06-2009, 06:57 PM   #1
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Default diff oil

Is there a guide somewhere that tells what weight oil will do what.Someone explained it to me like some weights will help with on power/ off power steering and all that.Just looking for a chart/guide for reference.
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Old 07-06-2009, 08:12 PM   #2
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Is there a guide somewhere that tells what weight oil will do what.Someone explained it to me like some weights will help with on power/ off power steering and all that.Just looking for a chart/guide for reference.
Google Hudy buggy and truggy setup guide.
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Old 07-06-2009, 08:36 PM   #3
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Originally Posted by Chris__RC View Post
Google Hudy buggy and truggy setup guide.
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Old 07-06-2009, 08:42 PM   #4
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I have it on PDF PM me an email and I can send it to you.
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Old 07-06-2009, 08:45 PM   #5
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Here is a good article by Chad Bradley.

http://www.rc411.com/pages/howto.php?howto=24
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Old 07-06-2009, 08:52 PM   #6
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Straight from the HUDY set up guide.


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
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Old 07-06-2009, 09:48 PM   #7
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Thanks everyone
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Old 07-07-2009, 03:22 AM   #8
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Quote:
Originally Posted by Frank L View Post
Straight from the HUDY set up guide.


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
this kind of info that makes us all love rctech. All shared. Nice work Frank L. It helps me too.. esp on the thicker center diff points. Thanks

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Old 07-07-2009, 06:30 AM   #9
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download the hudy setup book from them here: http://www.google.com/url?sa=t&sourc...g6X0pb_XPPKy0Q
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Old 07-08-2009, 07:39 AM   #10
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what oil i need?
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diff oil-pista-4.gif   diff oil-pista-5.gif  
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Old 07-08-2009, 07:54 AM   #11
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what oil i need?
whatever floats your boat , it depends on what you want how you drive - its hard to say
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Old 07-08-2009, 08:00 AM   #12
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Originally Posted by sakis View Post
what oil i need?
How's it drive what does it do that you don't want it to and what does it not do that you want it to. Start with the base line and adjust as per the hudy set up guide.
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Old 07-08-2009, 08:04 AM   #13
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Originally Posted by Frank L View Post
How's it drive what does it do that you don't want it to and what does it not do that you want it to. Start with the base line and adjust as per the hudy set up guide.

How does this Hudy thing work - all buggies - truggies are different the feell the push the pull, steering all different.
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Old 07-08-2009, 08:33 AM   #14
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How does this Hudy thing work - all buggies - truggies are different the feell the push the pull, steering all different.
You start with what ever setup you are running or most mfg's have a reccomended starting point and then you make adjustments to get the truck or buggy to do what you want it to. The guide just shows you what to do and which way to go. For example ad above on the diff oil, if the front is unloading badly then make the center diff oil thicker. The setup guide let's you know how to make adjustments to get the performance that you are after. It does not say all center diffs need 10k. It's used as a tuning tool. Hope that helps.
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