12-21-2005, 05:59 PM
ok here are my thoughts....
front:
lighter:
will help turn in, as you are headed to the corner, both sides are spinning the same. as soon as you turn the wheel, that diff needs to spin. if its light oil then it can start that action sooner.
if you go to light in the oil, coming out of the turn may suffer as the inside wheel will want to spin. also to light in the front can make the car twitchy on a less that perfect straight a way.... i had 3 in mine at cory's track, and quickly switched it out for 5 and i didnt have the wandering problem.
heavy in the front. well pretty much opposite as stated ubove... the prob i see with heavy is, if your turn in suffering, your gonna push, while your gonna have it pull you outta the corner better than light, your gonna leave the door open for some one to tuck in that corner and your gonna get passed.
you gonna have to find a middle ground, for me thats 5k mugen.
CENTER:
lite oil lets the front spin more that the back.. think of this.... rwd vs fwd in the snow...
when snowy (newberries sunday) the fwd car is gonna track better while accelerating.
if the rears are spinning due to a heavy center diff, then the car is gonna float around under power, also may loop out as you apply power outta the corner. again you need to find a ballance of both, so the car is neutral, or predictable. i tend to like 4-5k mugen in my center. 7 may work at LH tho as there will be more grip.
Rear:
to lite in the rear for me means the car will be unpredictable coming outta the corner on power. i can tell if my rear has leaked out or broke down, as i will spin out on exit.
on a medium tracktion track, to lite in the rear transfers the spin to the inside rear, once the weight falls back to that inside rear, that spinning will transfer to the otherside, then back again.... i seen it happen before. rear was all over the place when that happened.
to heavy can cause turn in to suffer, for the same reason i described for the front, as soon as the car turns, the diff needs to "diff". also if you go to heavy, it can act like a posi or a locked rear end, and your gonna spin out putting the power down outta the corner.
again, find a balance to where your commfy....
at newbs coming onto the straight, i was full power before most. i was full throttle right at the corner of the tube. if the car wasnt ballanced for power, there is no way i coulda started that early. 5 in the rear for me perfect as it is JUST heavy enuf to drive the outter rear, without letting the inner spin, and that really makes it come outta the hole hard.
NOW. ... i cant tell you what you need for diffs... every car and every driving style has an effect. i know how the ofna shocks are, i think they use a 1.1 hole in it. if you can find a numbered bit set, i believe #55 or 54 is like a 1.4 hole. wayyyyy better for shock action.
leeme see if i can find a online for the xray manual
oh and one more good tip.....
if you are having a prob with the front, adjust the rear, and vise versa....
the rear geomerty has ALOT to do with the way the front handles the corners.
i find the only thing i change is the rear, upper link and toe, and sometimes rear sway to fine tune.
front:
lighter:
will help turn in, as you are headed to the corner, both sides are spinning the same. as soon as you turn the wheel, that diff needs to spin. if its light oil then it can start that action sooner.
if you go to light in the oil, coming out of the turn may suffer as the inside wheel will want to spin. also to light in the front can make the car twitchy on a less that perfect straight a way.... i had 3 in mine at cory's track, and quickly switched it out for 5 and i didnt have the wandering problem.
heavy in the front. well pretty much opposite as stated ubove... the prob i see with heavy is, if your turn in suffering, your gonna push, while your gonna have it pull you outta the corner better than light, your gonna leave the door open for some one to tuck in that corner and your gonna get passed.
you gonna have to find a middle ground, for me thats 5k mugen.
CENTER:
lite oil lets the front spin more that the back.. think of this.... rwd vs fwd in the snow...
when snowy (newberries sunday) the fwd car is gonna track better while accelerating.
if the rears are spinning due to a heavy center diff, then the car is gonna float around under power, also may loop out as you apply power outta the corner. again you need to find a ballance of both, so the car is neutral, or predictable. i tend to like 4-5k mugen in my center. 7 may work at LH tho as there will be more grip.
Rear:
to lite in the rear for me means the car will be unpredictable coming outta the corner on power. i can tell if my rear has leaked out or broke down, as i will spin out on exit.
on a medium tracktion track, to lite in the rear transfers the spin to the inside rear, once the weight falls back to that inside rear, that spinning will transfer to the otherside, then back again.... i seen it happen before. rear was all over the place when that happened.
to heavy can cause turn in to suffer, for the same reason i described for the front, as soon as the car turns, the diff needs to "diff". also if you go to heavy, it can act like a posi or a locked rear end, and your gonna spin out putting the power down outta the corner.
again, find a balance to where your commfy....
at newbs coming onto the straight, i was full power before most. i was full throttle right at the corner of the tube. if the car wasnt ballanced for power, there is no way i coulda started that early. 5 in the rear for me perfect as it is JUST heavy enuf to drive the outter rear, without letting the inner spin, and that really makes it come outta the hole hard.
NOW. ... i cant tell you what you need for diffs... every car and every driving style has an effect. i know how the ofna shocks are, i think they use a 1.1 hole in it. if you can find a numbered bit set, i believe #55 or 54 is like a 1.4 hole. wayyyyy better for shock action.
leeme see if i can find a online for the xray manual
oh and one more good tip.....
if you are having a prob with the front, adjust the rear, and vise versa....
the rear geomerty has ALOT to do with the way the front handles the corners.
i find the only thing i change is the rear, upper link and toe, and sometimes rear sway to fine tune.