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HD 2007/2008 Engines

High Heat on 2007/08 HD engines

HD 2007/08 Performance Recommendations

Cool your exhaust temperature with the Wide Band O2 upgrade for 2007/08 HD

Harley Camshaft Specification Tables

HD Twin Cam Engine Builds
TC 128 HP 95 CID
TC 100HP Street Engine

The basics of Fuel Injection explained

DEWEY'S CUSTOM
Rammer Performance Air Cleaners
TC Performance Heads 100+HP

Pro Tuning on a Shade Tree Budget

   
Harley-Davidson

Twin Cam 88 Engine Performance Dyno Runs
69 HP

Performance and Technical information on Stage 1 engines for Harley-Davidson motorcycles.

Basic Stage one Engine Design

The Stage One Basic engine represents a simple approach to improve engine performance with bolt-on componentst. Most people can perform these modifications themselves. Modifications over stock engine are underlined in the list below. The estimated cost for these modifications ranges from $700 to $1000. The performance return for these changes can be large for the dollars spent. Increases up to 10 HP and 10 Ft.Lbs of torque can be seen on some bikes.

This dyno run was sent to us by. The dyno run was performed by Fast Company in Kirkland, WA. This is the highest performance numbers seen on a Twin Cam 88 equipped with a carburetor. A maximum of 69 HP occured at 5200 RPMs, with maximum torque of 79 ft. lbs. at 4000 RPMs. The HP and torque curves for this engine combination was very smooth, with a broad torque curve over 70 ft. lbs. starting at uder 2300 RPMs and extending to 5000 RPMs.

Year: 1999 FXDWG
Model: Twin Cam 88
Owner: B.D.
Bore: Stock
Stroke: Stock
Displacement: 1340cc
Cases: H-D
Assembly: H-D
Crankshaft and Flywheel: H-D
Heads: H-D
Intake Valves: Stock Diameter
Exhaust Valves: Stock Diameter
Valve Springs: H-D
Porting: None
Compression Ratio: 9.2:1
Pistons: H-D
Cam: H-D
Pushrods: H-D
Carb: Stock Keihin CV - rejetted
Manifold: Stock
Air Cleaner: Screamin Eagle K&N
Ignition: HD
Ignition Timing:
Coil: H-D

Plug Wires: H-D
Pipes: Stock Exhaust with Screamin Eagle Slip On Mufflers
Dyno Tuning Facilities: Fast Company, Kirkland, WA.

69 HP @ 5200 RPM
79 ft. lbs. Torque @ 4000 RPM

tc88dyno_depth.jpg (23992 bytes)

 

Last updated May 11, 2006
Copyright© 1996,1997,1998
Stephen P. Mullen
P.O.Box 1085, Oldsmar,FL 34677
All rights reserved
Contact SPMullen@nightrider.com
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The Horsepower Gallery provides an extensive list of bikes , the power they produced and the major engine components.

 

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Modification, Installation, Maintenance and Tuning Index  will help you find most of the information you want on one page.

How to get Professional Tuning Results at home
Testing the Innovate Motorsport LM-1 portable air fuel meter

Profession Tuning on a Shade Tree Budget

Veypor VR2 Data Logger and Instrument Panel
Video Installation and Demo
Purchase VR2


Engine Performance
How to Build a
TC96 2007 Engines
TC88 70HP Stage1  
TC95 128HP Stage 3
TC95 100HP Street
 
TC96 2007 Stage 1/2
EVO 64 HP Stage 1
EVO 74 HP Stage 2
EVO 82 HP Stage 3
EVO 95 HP Stage 3
883 to 1200 Upgrade
Shovelhead Modifications

New EFI for EVO and TC

Performance Gallery
Horsepower Gallery
Evolution 80
Shovelhead
Sportster
Twin Cam 88/95
Evolution Unlimited
Sportster Unlimited
Drag Strip Gallery
Land Speed Racing Gallery
CV Carburetor
Modifying the CV carb
Tuning a CV carb
Camshafts
Selecting a cam
Install a TC 88/95 cam
Install a Big Twin cam
Install Sportster cams

Camshaft Specifications
Twin Cam
EVO
Shovel
XL


Exhaust Systems
EVO Exhaust Testing
TC Exhaust Testing
Khrome Werks AR100 test
Making Drag Pipes Work

SHOP TALK
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Carburetor Troubleshooting
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Shop Manual Appendix
$20 Bike Lift
Plug Wires
Spark Plugs
Engine Tuning
Nitrous Oxide
Motor Oil
Stutter Box
General Information
WEB Links
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Miscellaneous
Performance Calculations
Estimate Horsepower
Estimate 1/4 Mile Time
Estimate Top Speed

Engine Displacement
Exhaust Length
Gear Ratios
MPH at RPM
Air Density

The Nightrider Diaries
The ramblings of a genius a, a madman and something in between.

Where is Sifton Cams?

Autocom Active-7 tested

Harley-Davidson EFI
-EFI basics explained
-EFI modifications explained

183 HP, 2 carbs, 2680cc

Copyright 1997-2006  Stephen Mullen, Oldsmar, FL -+-