Hello everyone. I have a quick question on modifications to my Baja suspension. I don't need any more ride height, but was curious about how much additional travel I would be able to get upfront if I replaced the UCA's.
This is the info about the suspension provided in this article:
The Baja Series receives a 1.75-inch lift upfront thanks to TRD springs wrapped around Bilstein shocks. The shocks are based on Bilstein's high-end 9100 Series dampers and use a 60-mm piston (compared with 32 mm for the stock Tacoma 4x4). The new front suspension increases wheel travel from 8 inches to 9.25 inches. It turns out the limiting factor for more suspension movement is the upper ball joint, and finding a better one would have cost too much time and money, according to the team. "We built this system so it could grow with the customer," Zwillinger says. So an owner could, for example, buy a pair of aftermarket upper A-arms that allow even more front-wheel travel, and then have the Bilsteins modified to match. The front bump stops are slightly shorter to allow for the increase in jounce (compression) travel.
In the rear, the TRD team selected the three-leaf (plus one overload leaf) spring pack used in Tacoma towing packages, which provides a 10-mm increase in rear ride height. The damping comes form Bilstein 5160 remote reservoir shocks that have been custom-valved. The team did much of the suspension testing and tuning at the Ocotillo Wells State Vehicular Recreation Area (SVRA) in California and had Bilstein's shock-tuning truck on hand to make on-demand adjustments to the valving. "We did at least three or four rebuilds on the rear shocks before we got it correct," says Zwillinger, "but basically we dialed-in the lightest tuning possible that would meet our durability requirements". The rear suspension package increases wheel travel from 8.5 inches to 10 inches—mostly in rebound (droop) travel. And to allow for the increase, the rear brake lines have been lengthened slightly with a bracket.
How much more travel would I see, and what would need to be done to the 9100s? Would this void my warranty?
Lastly, would I need to modify the bump stops? Would there be any benefit in installing something like this Jounce Shock system?
Thank you for the help.
This article also mentions the ability of the Bilsteins to support more travel with new UCA's:
The enormous 60mm Bilstein shocks (originally designed for motor home use) will support more travel should a buyer decide to swap out the A-arm for an aftermarket unit.