Originally Posted by
JoeW
Ok getting a little frustrated with my new 48.4. Only driven it a few times and honestly it's all over the place. I'm certain it's a setup issue and we have our first race with it this weekend.
Current setup is stock. Track is hot florida, hard pack red clay with dust on top. Went out about an hour ago to practice and the car is spinning out every corner. On the straight it wants to fishtail as well. It's like I have no traction in the loose stuff.
I think I need to start in the diffs. It jumps and lands just fine (unless it starts to fishtail up the jump). But it just doesn't want to have any traction in the corners.
Instead of 10/10/7...does anyone run similar track conditions? I am going to tear it down tomorrow. It ends up on it's roof more often than not and I'm getting frustrated with my new toy. My son kicks ass with the 22-4 but we just can't tame the 48.4.
do the arms fall freely? If you skipped the step of using an arm reamer or drill bit through the arms, the car will have difficulty just going straight. Hinge pins should fall through the arms with its own weight alone. Remove hubs and shocks from the arms and make sure they are free.
Also test the shocks after detaching it from the arms. Keep it on the shock tower and make sure it rotates around the tower and sways freely. Had a friend who tightened the nut on the shock standoff so tight that it crushed the plastic shock cap bushing causing it to bind up. The car couldn't even go straight, and on high grip the car couldn't even go 5 feet without flipping over.
Make sure each diff spins freely. Turn one outdrive and make sure the other outdrive on the same diff smoothly turns the other way. You shouldn't feel any resistance except from the diff fluild, not feel the gears grinding to the point that it has unequal resistance throughout rotation. Reason why I say is I had one spur gear fully tightened and would have a bad grinding feel. I knew the plastic gear might be a bit off, so I added an extra diff seal and after that the center diff was free. It happens because the spur gear and gear case is plastic. When I replaced the spur gear with another plastic gear there was no need for that extra diff seal to distance the gears a bit.
If those are good then setup is all that's left, but it sounds as if it's more than that.