The Seatruck Horsepower Upgrade is a Seatruck upgrade which increases the Seatruck's speed when hauling two or more modules. The upgrade does not stack.
It can be crafted in the Seatruck Fabricator Module.
Max speeds with and without horsepower upgrade. "0" means the cabin alone. For reference, the Seatruck travels at 9.18 m/s with no modules and the player swims at about 5.9 m/s. Adding modules decreases total speed to a fixed percentage. Adding the Seatruck Horsepower Upgrade increases the speed by a fixed percentage. The final speed is shown in parentheses.
|# of Modules||Max Speed Without Upgrade||Max Speed Actual||Speed Increase With Upgrade||Upgrade Speed Actual|
|0||100%||9.18 m/s||+0% (100%)||9.18 m/s|
|1||100%||9.18 m/s||+0% (100%)||9.18 m/s|
|2||66%||6.14 m/s||+30% (87%)||8.01 m/s|
|3||50%||4.60 m/s||+35% (68%)||6.21 m/s|
|4||40%||3.67 m/s||+40% (55%)||5.09 m/s|