RE: $1,000.00 bounty offered to fix COMP ARF A4 steering
The tubing expansion is minimal and not the main problem. All this system is doing is transfering the servos force through the fluid to the arm on the wheel. If you size the cylinders the same bore diameter a 1/4" displacement on one will move the other the same amount. The tubing size (as long as it isnt restrictive) will have nothing to do with the rate things happen. With no load on the gear does your steering servo bog down? if no the tubing is big enough. It looks like your master cylinders bore is a bit larger than the slave cylinder on the nose gear so your rates will not match. a larger diameter master cylinder gives you some mechanical advantage -which you probably need due to the short lever arm on the nose gear. so you probably want to hook the master cylinder to the servo as far in on the servo arm as possible. Assuming you get everything centered and the air bled out servo slop could be a factor too. Slop from the servo on the master cylinder will be magnified on the other cylinder. 8711 aren't the most slop free so you may want to look at a servo with a tighter gearset.