American Iron Magazine December 2017

SAE Horsepower RPM (x1000) SAE Torque (ft-lbs.)
110
110
100
100
90
80
70
60
50
90
80
70
60
50
11
After Chris removes and positions both sprockets in
the stock cam chain with their timing dots (arrows)
aligned, he slips both sprockets onto their shafts. They
can only go on one way; keep the dots aligned.
40
30
20
10
0
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Baseline: Max Power = 81.89 Max Torque = 101.30
S&S Cams: Max Power = 92.14 Max Torque = 107.66
CF: SAE, smoothing @ 5
Dyno time by
Bayside Harley-Davidson
40
30
20
10
0
12
Using new hardware from a H-D sprocket retention
kit (#25566-06), a 1/2" socket, a 9/16" socket, and a
sprocket locking tool (#94076-09), Chris torques the
hardware to the torque values listed in Step 9.
15
With the engine positioned as it is, the rear lifters are
at their lowest point, so Chris completely collapses the
S&S Quickee pushrods, slips them into their pushrod
tubes, and positions them under their rocker arm and
over their lifter.
17
Using a 1/4" open-end wrench and two 7/16" open-end
wrenches, Chris adjusts the two rear cylinder pushrods
four full turns as per the S&S instructions. He then locks
this adjustment into place using the locknut.
13
Chris can now reinstall the stock hydraulic chain tensioner
using the two stock bolts, some S&S-supplied
threadlocker, and a T-27 Torx. He torques the bolts to
90-120 in-lbs.
14
Chris assembles the S&S pushrod tubes that came
with the S&S adjustable pushrod kit. Note the order
of assembly and where the different O-rings go. Chris
then installs the S&S O-rings into the rocker boxes and
lifter covers.
16
Using a large hemostat, Chris holds the locknut onto
the adjuster’s upper end as he threads the pushrod
back onto its adjuster. Once threads are showing, he
threads on the locknut so it won’t drop to the bottom
of the adjuster.
18
Once the rear lifters have bled down, Chris rotates
the engine one full rotation of the crankshaft, which
is when the cam sprocket dot (arrow) and the pinion
sprocket dot (arrow) are both at 12 o’clock.
84 / American Iron / Issue #358 AIMag.com