PROJECT LOSI/HORIZON HOBBY ROCK REY
Pro-Line PowerStroke XT shocks replace the stock
plastic units. ;e Pro-Lines feature threaded
aluminum bodies, which are stronger than the
stock plastic units. ;ey also feature dual-stage
springs, which have a soft rate for small bumps
and a firmer rate for larger bumps and jumps. ;ey
come assembled, so all you have to do is fill them
with the shock oil of your choice. Before filling the
shocks, I greased the seals with Pro Tek Premier
Blue O-Ring grease to make the shocks as
smooth as they can be. ;e stock PowerStroke
X T shocks are a little long for the front of the
buggy, so I placed a 1/2-inch spacer under
the pistons of the front shocks to shorten the
stroke a bit. For springs, I’m using “red” upper
springs and “yellow” lower Pro-Spec springs,
per Pro-Line’s suggestion.
Beefed-Up Suspension and Steering
;ough I didn’t have any issues with the stock steering parts, I decided
to enhance durability and rigidity (and add a few style points) with some
choice aluminum parts. ;e stock steering components lean more
toward the soft side, which means they basically act like a servo saver
and protect the steering servo. Losi o;ers aluminum versions for crisper
steering response, which I installed. I also replaced the upper track rod
mounts, upper and lower rear bulkhead mounts, and rear shock tower
with Losi’s aluminum units. When it came to replacing the rear links, I
only changed out the upper links. Losi does o;er aluminum lower links,
which are stronger, but sliding over rocks galls the aluminum and slows
the buggy down. Plastic links slide more easily, and I think of them as
sacrificial parts. Once they really get chewed up, a new set is only $14.
;e upper links were replaced with strong stainless-steel ones from
Vanquish. ;ey are much stronger than the stock pieces and will ensure
that the axle stays centered under power and in rough terrain.
I firmed up the steering by replacing the stock flexible plastic bellcranks with
aluminum ones from Losi.
;e rear suspension was upgraded to aluminum and stainless steel in some areas
to improve performance and durability.
I’ve used PowerStroke shocks on a bunch
of builds, and they always perform well.
Pro-Line o;ers a full range of tuning springs
for the shocks.