Recommended Upgrades for 2007/2008 HD Twin Cam engine
The number of 2007 performance engines is increasing. But Nightrider.com
still recommends staying with fairly
conservative upgrades. We are only listing a few bolt-in cams right now
that meet the performance needs for all but the most radical of engine
builds.
Please be aware that complete exhaust systems and cam shafts are very
specific to all 2007/08 96/110 CID engines and 2006 Dyna models. Exhaust
systems for these bikes have bungs installed in them for the O2 sensors
required to maintain EPA compliance. While any exhaust system can have O2
bungs welded into them, placement of these bungs is important and the
chrome will be damaged when welding in a bung.
We will continue to expand the engine upgrades section as more parts become
available for the 2007/08 bikes.
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Harley-Davidson
Screamin' Eagle Warranty Issues
It seems that many riders believe that
using Screamin' Eagle performance upgrades have no effect on their HD
Warranty. Despite what the local HD Dealer may tell them, only HD
parts that are listed in the 2007 Catalog with a "green
light" designation can be installed on their bikes without
having a negative effect on the warranty. This means that most
Screamin' Eagle components will void the warranty on much of the
engine.
While in some cases your local HD Dealer
can "sneak" a warranty issue through Harley's process as
a courtesy to its own customers, it is highly unlikely that another
Dealer will extend the same courtesy.
No matter what your local Dealer may tell
you, the explanation of the warranty listed above is an honest
interpretation of how Harley-Davidson is now enforcing its warranty. |
The chart below lists recommend parts for upgrades that can be
performed to your 2007 Harley-Davidson. While the list is not all
inclusive, it does contain a list of parts that Nightrider has extreme
confidence in. These parts and suppliers have historically provided the
type of components and upgrades that have above average performance.
| Component |
FLH based Bikes |
Dyna/Softail |
Sportster |
| Exhaust Upgrades
There are many good exhaust system upgrades,
however we have chosen to list the systems we know produce above
average power. These are systems that we would use as
"reference" performance when dyno testing other pipes.
|
Khrome Werks HP Plus slip-on Mufflers
SuperTrapp slip-on mufflers
Thunderheader
RB Racing LSR
|
Khrome Werks
slip-on Mufflers
Thunderheader
SuperTrapp 2-1
RB Racing LSR
|
Khrome Werks slip-on Mufflers
Thunderheader
SuperTrapp 2-1
|
| Air Cleaner |
K&N Air Cleaner Kit
SE Air Cleaner Kit
|
K&N Air Cleaner Kit
SE Air Cleaner Kit
|
K&N Air Cleaner Kit
SE Air Cleaner Kit
|
EFI fuel adjust
for stage 1 upgrades only |
MasterTune TTS
TFI Techlusion
|
MasterTune TTS
TFI Techlusion
|
MasterTune TTS
TFI Techlusion
|
EFI and Ignition Remapping
Required for serious
performance tuning |
SE Race Tuner
Thundermax EFI
Daytona Twin-Tec |
SE Race Tuner
Thundermax EFI
Daytona Twin-Tec |
SE Race Tuner
Thundermax EFI
Daytona Twin-Tec |
| Aftermarket EFI Notes: |
We recommend the use of Wide Band O2
sensor upgrades with aftermarket ECUs when this type of upgrade is
available. The ability of the ECUs like the ThunderMax and Daytona
Twin Tec to self-tune with their WBO2 sensors add-in can save riders
money over the long term. Rather than having to pay for tuning when
you make changes to your engine, you simply put the ECU into
"self learn" mode and the fuel map can be updated.
For fine tuning to maximize power, some minor dyno time may be
needed. But the 3-4 hours required to create a custom fuel map from
scratch is eliminated. |
| Bolt-in Camshaft
Gear Drive cams are not required for the 06 Dyna's
and 07 engines. HD has dramatically improved the cam drive
mechanics.
|
Andrews TW-26H
Crane HTC-300
Kuryakyn TC-1
Andrews TW-37H
Crane HTC-310
CycleRama CR-3 |
Andrews TW-26H
Crane HTC-300
Kuryakyn TC-1
Andrews TW-37H
Crane HTC-310
Kuryakyn TC-2
CycleRama CR-3 |
|
| Big Inch Kit |
Nightrider recommends a 103 CID big bore
upgrade as more cost effective than the 110 stroker upgrade. |
883 to 1200 upgrade |
| Performance Cylinder Head Upgrades |
While the SE cylinder heads can produce
nice improvements in performance, Nightrider recommend the use of
professionally ported heads from the aftermarket to maximize power capability.
The top rated performance shops are constantly refining their
product to improve power output. The best performance shops are able
to get 100+HP and 100+ft.lb. torque from 95/96 cubic inch engines
with 9.5:1 compression. This would translate to 110/110 from a
103CID engine and 120/120 from a 110CID. |
Nightrider recommend the use of
professionally ported heads from the aftermarket to maximize power capability.
A well configured and tuned 1200cc engine is capable of 100-110HP. |
| Maximum Compression Ratio |
9.5:1 compression ratio is recommend to prevent
detonation and overheating that frequently occurs in the heavy FLH
based bikes. A properly built 9.5:1 engine makes about 97% of the
power of the higher compression engines. |
9.5:1 compression is recommend for most bikes.
Ratios up to 10.5:1 can be used when the top end of the engine is
properly blueprinted. It is highly recommend that RPMs be kept above
2500 RPMs while riding to prevent detonation. |
|
High Lift Camshaft
Bolt-in cams can also be used very effectively. Gear
Drive is not required for 07 engines. |
CycleRama CR-5
Red Shift 575
Andrews TW-32H
Kuryakyn TC-26 |
CycleRama CR-5
Red Shift 575
Andrews TW-32H
Kuryakyn TC-26
Andrews TW-55
Red Shift 577 |
|
| Performance Throttle Body |
Recommended for serious performance work |
Recommended for serious performance work |
Recommended for serious performance work |
| Performance Notes |
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|
|
| Crankshaft Bearings |
96 CID engines are known to have weak
crankshaft bearings. For serious performance work these bearing must
be replaced with the heavy duty bearings used in the CVO 110 engine.
The 110 upgrade kit does not contain these bearings.
Any 96CID based engine that is going to experience 'severe use' or
is expected to produce over 110HP should consider this bearing
upgrade. When the OEM bearings have a problem, the engine will
experience a catastrophic failure. |
|
| Hot exhaust and engine temperature |
The 2007 engines have a reputation for
very hot exhaust systems. This problem is well documented for the
2007 FLH's, but does exist on all the bikes. All these bikes
including the 2006 Dyna's are also know to have high operating
temperatures and poor throttle response while cruising. This issue is directly related to the EFI
closed loop operation mode at idle and cruising speeds. In closed
loop mode, the narrow
band O2 sensors used by the Delphi ECU hold the air fuel ratio at
14.7:1 which is good for EPA compliant emissions but creates a very
hot exhaust pipe. Nightrider has a fix for this issue that will
reduce the exhaust temperature, improve throttle response and
increase HP. See the LC1 WBO2
upgrade page for more information. |
Nightrider.com
Hot Exhaust Fix
(LC-1 WBO2 upgrade for HD) |
Here is a first look at the electronic control module
used for the Nightrider fix for the hot exhaust /
hot engine temperatures found in the 2007/08/09 HD bikes. The size of the
main electronics module is 3.5"Lx1.5"Wx0.9"D and is
intended to mount under the fuel tank or the seat of the bike.
The upgrade will consist of two LC-1 electronic modules, two WBO2
sensor, HD wiring harness adapter,
programming instructions for the LC-1, and detailed installation
instructions to connect the upgrade to your motorcycle.
No ECU upgrades or ECU programming required for HD/SE Stage 1 and
Stage 2 upgraded engines. The upgrade is 100% compatible with any of the HD or SE ECU
downloads, and is compatible with SE Race Tuner for highly modified
bikes.
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