Diff oils explanation

[RichyUK]

Hi Guys,

have had a search but didn't find anything, is there any guides as to which gear oils would be used in which instance?

Cheers
Rich

[MHeadling]

I would take a look here, loads of set ups for the UK tracks for the Rango:

http://www.team-durango.com/in-the-p...001&country=gb

If its for Faversham, 5000 front an 2000 rear seems to work well with quite a few of the lads on this.

[RichyUK]

hi mark,

i've had a look over some of them, and have printed some off for reference, but wondered if anyones made a post which explains why certain grades are used in certain instances. I guess its to alter turn in characteristics? especially as its the front that appears to be messed with...

got my sons Durango now, just waiting on the V3 to come out to get mine!

[Legacy555]

ooohh, I'll stick my neck out here and offer the following from my limited experience with the V3...

Larger difference between front and rear will cause the front to rotate less, but carry more speed as you can load the car more through the corner. And the higher traction you have, the higher viscosity oils you would use overall - cuz you can get the power down. Higher viscosity oils on a greasy or wet grass track tends to make the car broadslide rather than be forgiving under power.

[RichyUK]

Originally Posted by Legacy555

ooohh, I'll stick my neck out here and offer the following from my limited experience with the V3...

Larger difference between front and rear will cause the front to rotate less, but carry more speed as you can load the car more through the corner. And the higher traction you have, the higher viscosity oils you would use overall - cuz you can get the power down. Higher viscosity oils on a greasy or wet grass track tends to make the car broadslide rather than be forgiving under power.

ok cool, cheers for that, so what is the actual effect that the oil vicosity is having? im presuming the thicker oil is effectively making the diff tighter, and giving it more grip..

[Legacy555]

Originally Posted by RichyUK

ok cool, cheers for that, so what is the actual effect that the oil vicosity is having? im presuming the thicker oil is effectively making the diff tighter, and giving it more grip..

The viscosity of the oil limits the independence of each side of the diff.
If you run a heavy oil, the diff will act more and more like a solid axle.
If you run light oil, more of the drive will be sent to the wheel with least traction/loading.

So its a balancing act really. You need to weigh up how much grip is available, and consider how tight the track is and set the oils to maximise forward drive without giving too little steering for the track conditions.

[t8rtot]

good info here, the oil wts are for dirt tracks but i would imagine the concepts are the same.

http://www.petitrc.com/setup/durango...adBradley.html

[RichyUK]

thanks for the advice guys, i think what i'm trying to do is understand all this in terms of real cars and how i would adjust one of my track cars for the track and what affect diff settings have.

On another note, are there any particular brands that people use, the fastrax one crops up a lot on google search.