Originally Posted by keavze
just need to clarify:
higher track traction, thicker diff oil; lower track traction, lighter diff oil.
small and tight tracks, lighter oil; big and flowing track, thicker oil.
so...what oil to use if track is low traction but big and flowing?
also; what's the effect to the car/handling if u used the wrong oil ratings?
(high traction using lighter oil or low traction using thicker oil)
i've started to question these commonly held assumptions, especially when it comes to shock oils.
my last race was a 2 day event at www.moorebankraceway.com
the traction was high, and the track is a very large flowing track with hard braking sections.
anyway, i ran losi 30 wt oil in my shocks. i also drilled out the front and rear pistons to to holes each (1.2mm diameter) i also ran xray yellow springs!
(softest springs from the electric xray T2 collection) on my car.
i also ran 10,000wt oil (but with knack 0.8module gears installed in the diff)
also ran a c ackerman. The car handled fine, did quick times and entered and exitewd the corners really well with no hint whatsoever of understeer in any part of the track. I used active potenza SPR body with the option wing.
this setup was also used on a very loose slippery track with the only changes made being a narrow trackwidth for the slippery track, i also lowered the rear shocks to the bottom hole for the slippery track, and raised the shocks up 2 holes for the above track.
sometimes a thicker diff oil makes the car exit too aggressively, and hence kick out the rear. On a high grip track if you can keep the front end steering throughout the corner, then a lighter diff oil allows you to apply the power earlier in the corner, and you then subsequently steer the car out of the corner with the grip provided fromt he front, (as opposed to the "slide" or "loose rear end" type effect provided by the rear diff when you are using thicker oil)