SECTION 1: 2007-2012 BIG TWINS - S&S Cycle

2007-2012 BIG TWINS
Continued
CNC Ported Cylinder Heads from S&S®
Parts for
Twin Cam 96 /103
2007-2012
Parts for
Twin Cam 88 ®
1999-2006
Parts for
Evolution ®
1984-1999
Parts for
Sportster ® & Buell ®
1986-2012
The CNC Difference: The dyno chart compares a stock 2009 FLHT (black curves) with the same
bike after an S&S 106" Big Bore Top End Kit, 585 cams and S&S slip on mufflers, and an S&S
teardrop AC were installed. The top curves show the same engine after the heads were CNC ported
and a 58mm throttle body was installed. Both 106" engines perform much better than stock, and
are pretty comparable to each other until about 3500 rpm. At that point, the engine with CNC
heads continues to increase in torque and horsepower because it can still get enough air.
Dyno Comparison
Stock 2009 FLHT vs S&S 106” Kit, Slip-On’s, Intake, CNC Porting. With 551 & 585 Cams
S&S 106”, Slip-On’s, 585 Cams, CNC, & SE 58
Peak Rear Wheel HP 115.2
Peak Rear Wheel Torque 112.0
130
120
110
100
90
80
70
60
50
40
30
20
10
0
1000 2000 3000
S&S 106”, Slip-On’s,551 Cams CNC, S&S AC
Peak Rear Wheel HP 96.9
Peak Rear Wheel Torque 113.4
Stock 2009 FLHT
Peak Rear Wheel HP 68.6
Peak Rear Wheel Torque 84.7
4000 5000 6000
7000
EngSpd RPM
Choose The Right Cam For You: This dyno chart compares a stock 96" 2009 FLHT on the
same bike with an S&S 106" Big Bore Top End Kit with CNC ported heads, S&S slip-on mufflers,
performance intake, and two different cams. The blue curves represent the 106 with S&S 551
touring cams and S&S teardrop air cleaner on the stock 50mm throttle body. Great torque for
performance touring applications. The top curves show the S&S 585 cams with a 58mm throttle
body. The increased duration of the 585 reduces low and midrange torque, but the combination of
more aggressive valve timing, higher lift and a larger throttle body significantly increases usable
rpm and top end horsepower. A good choice for lighter bikes and racing applications. Both engines
were tuned with Screamin' Eagle® Race Tuner.
Notes:
• Only cylinder heads that are in good condition and have "like new" appearance may
be exchanged. Heads with non-OEM compression release machining, superficial
damage, peeling or discolored paint, or other cosmetic alterations are not acceptable
for exchange, but may be reworked. Rework will take slightly longer than exchange
service. Customer will be contacted to review options if heads do not pass inspection.
• CNC porting is not available for previously ported heads, heads that have been
structurally damaged, or heads that are determined to be unserviceable during initial
inspection. These heads will be returned to the customer without modification. In
these cases, the customer will be notified and options will be reviewed. New, CNC
ported stock heads or S&S heads are available for purchase.
• Due to variations in stock cylinder head castings, all inside surfaces of the ports may
not "clean up" during machining. As a result, the inside of one or more ports may
not appear to be completely machined. This does not effect performance and is not
considered a defect.
• Fuel injection tuning required.
• CNC porting is not currently available for Harley-Davidson® CVO engines or Screamin'
Eagle® cylinder heads.
• Must use Screamin’ Eagle® high flow injectors, H-D #27796-08, with kits over 106"
Parts for
Vintage Engines
1926-1984
Parts for
X-Wedge®
2007-2012
Parts for
Victory®, Off-road
& Metric
Racing
Products
Tools & Shop
Supplies
Dealer Services
& Promo Items
Warranty &
Company Policy
OEM Cross Reference
Appendix & Index
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