SC10 4x4 Thread
Tech Regular
Joined: Dec 2010
Posts: 289
From: SoCal
I love my sc10 4x4 but need more traction through the sweepers running cab setup saddles brace all the goodies just 7 diff oil up front and 5 in the back 2mm swaybars tried all 3 clay tires track is dry but my buggies are hooked up would 30k up front make the car push through sweeper? Everywhere else car is perfect turns on a dime
A heavier front fluid will make make the front wheels pull the truck more...down the straights and turns. It helps stabilize the rear end from wanting to come around on itself in sweepers and does give you more on power steering, however, at the expense of a wider turning radius. This can work great on certain tracks with limited traction or tracks that don't have tight 180deg turns.
I ran 30K front / 5K rear with 2.0 sway bars and blue springs F/R. Ran the shocks with 32.5 F / 27.5 R, no boots and 1 x ring with shock eye turned 3 turns out. Camber links in stock location with no washers. Track was hard packed and watered to drying with medium traction and smooth. With medium traction the truck felt planted and you could get on the throttle hard. Truck felt balanced and would power through the turns. You could slide it slightly which would make up for the slower turning due to the 30K diff fluid up front. This was the setup that Stephen Bess drove and liked.
The following week the track was wet and tacky with more grip. The truck turned too slow in the tight turns. I changed the front diff fluid to 10K from the 30K I had in originally. Truck was completely different in the way it handled. It turned on a dime on power, however, at the expense of being loose in the rear. I had problems getting onto the straightaway hard on throttle and in the sweeper. The truck felt like it had way more body roll and not as stable. I added 2mm under the front ball stud and this helped but it still was not as planted with the 30K in the front diff even with more grip. I tried putting in the yellow front springs and while it helped with the rear end, it slowed the steering down a little too much. I can take the 2mm out of the front ball studs to get the steering back but the truck felt better to me with the front blue springs. All a balancing act.
Bottom line is, you need to test different front diff fluid weights to see what suits your track and driving style. My setup may not work for your track or driving style and vice versa. Find a front diff fluid weight that is enough to pull the truck and have good on power steering but turn tight enough for you. You then need to make the proper camber link adjustments for proper balance F/R along with your shock setup. Only make one change at a time because even a small adjustment can make a big change in how the truck handles.
Last edited by F_ME; 02-02-2012 at 10:21 AM. Reason: typo
has anyone tried using the clicker at all when they need more steering? If so, what are you seeing when using it and where are you seeing a benefit?
My understanding if its correct is that the front clicker will let the front wheels freewheel more off power.
My understanding if its correct is that the front clicker will let the front wheels freewheel more off power.
http://rcshox.com/shoxshop/catalog/i...hp?cPath=23_26
Yes the clicker allows the truck to brake like a 2wd. I tried it on a large outdoor clay track and didnt really like it. It did give me a bit more steering but felt slower through the corner. Easy to adjust give it a shot.
Front wheel breaking is one of the main reasons I like to run 4x4 in the first place, so it kind of defeats the purpose for me.
You understanding is correct. It allows the front wheels to continue spinning while under braking and locks the rears up without slowing the fronts at all. I used it once at a really tight and loose track to throw my truck around all the 180 turns because it was faster than slowing down and turning in.
It basically replaces the pads with metal washers, and has holes drilled in the spur to hold the ball bearings. this Since the slipper plates are connected independently front and rear it transfer power to each side evenly depending on how much resistance is applied to each plate.
Correct me if Im wrong, but raising the roll center(lowering the theoretical cg) decreases overal traction due to less weight transfer to the outer tire?
This is exactly what I did to get the rear end looser on my truck in the high speed sweeper( I was having some traction roll issues, even went with thicker swaybars front and rear)
This is exactly what I did to get the rear end looser on my truck in the high speed sweeper( I was having some traction roll issues, even went with thicker swaybars front and rear)

Raising the roll center makes the effective moment between the CG shorter. It makes the car more responsive, makes the car more resistant to roll, and takes away traction. If you are traction rolling, this isn't a bad trade off because giving up a little grip is better that being on your lid.
Adding shims under the inner ball stud will move the instant center further out (longer), induces more chassis roll because the effective moment between the CG and the roll center longer, and increases weight transfer.
Something else to be mindful of - as the suspension moves, the roll center, the instant center, and the CG all move.
http://www.rctech.net/forum/attachme...oll-center.gif
Tech Adept
Joined: Dec 2011
Posts: 123
From: White Salmon, WA
Reversing the stock ack bar so the ball stud holes are further back calms the truck down, right? It appears that this will be the same as the rcshox ack bar in the furthest back holes. Any input on this? Seems like a free and easy mod that would help the truck. Thanks.



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