Originally Posted by John.C
What is the general consensus on oil weight for the rear gear differential? I'm currently running AE 80wt (=1000cST) oil in my gear diff. The diff is very loose and free. I've run my car on 4 different race/practice days with mixed results. The first 2 sessions my car was very predictable and easy to drive. I would categorize the overall handling as slightly pushy. It would be slightly pushy entering the turn and at mid corner and corner exit (full throttle) my rear end was planted while providing the right amount of steering.
However, my last 2 race days have been complete opposites and utter disasters. My car is still slightly lazy entering the corner but rotates way too quickly at mid/exit causing it to hook or traction roll (when traction comes up). I've had several folks (excellent drivers and experienced at chassis setup) help me out this past weekend. Based on their recommendation I made numerous changes througout the day but was unable to get it to where it was on the first two outings. By the end of the day everyone was pretty much stumped.
I've been thinking about going to a slightly heavier (even mix of 1000cST and 2000cST) weight oil on my gear diff. Do you guys think that can help? There's a big race in January at my local carpet track and if I can't get this sorted out I'll most likely shelf the car for that race.
was the original setup that worked great the first two times.
I just looked at your setup and there are some thinks that i will not use like that.
- cut your topdeck
, uncutted its for the use of foams on carpet, with rubber tires its essential to cut the hole topdeck ass shown in the manual !!!
- remove the 4 screws in the rear
of the car like shown in the manual !!!
- don't use the swaybars
- open your front toe +2 (each side) to make the car more roll in the corners and prevent trationrolling <--very important change !!!
- use a little more expo on your sterring (-20 / -35) to make the car not so aggressive entering the corners.
- if you really want to see the potential of the car...do not use the base setup on rubber carpet. in that setup your rollcenter is way to high in front etc.
If you want a winning setup for with alot of sterring and incredible cornerspeed, please try this one.
when its to aggressiv on the sterring please change
- dampers front and rear to 5mm / 2mm (same front and rear)
- no active caster in frotn so please make 3mm under every ballstud
with all these changes you will be really impressed by the handling of the A700 ... it drive more like a 1/12 car than a 1/10 on rubber...
tell me what you think and have fun
kind regards Tom