| Harley-Davidson Engine Performance Dyno Runs
54.9 HP |
| Performance and
Technical information on stock engines for Harley-Davidson motorcycles. Stock Engines are the starting point for all the
modifications. The only way to validate what the performance gain was for any change is to
have dyno runs before and after. These are the before runs of several bikes. |
Stock Engine (49-states)
with no modifications (Baseline)
Stock engines can show up with a wide variation in
available power. This particular bike represents a typical dyno run for a stock 49-states
bike.
Year: 1994
Model: EVO
Bore: Stock
Stroke: Stock
Displacement: 1340cc
Cases: H-D
Assembly: H-D
Ignition: Stock 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: 8.5:1
Pistons: H-D
Cam: Stock H-D - 208° Duration Intake- 202° Duration Exhaust - .472 Lift
Pushrods: H-D
Carb: Stock CV w/No Modifications
Carb Jetting Information: Stock
Manifold: Stock
Air Cleaner: Stock
Ignition: Stock
Ignition Timing: 32° BTDC
Coil: Stock H-D Dual Fire
Pipes: Stock with stock mufflers
Dyno Tuning Facilities: CycleRama,
Pinellas Park, FL. (813) 546-0889
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Stock Engine ( California ) with no
modifications (Baseline)
Stock California engines show up with less power than the 49-states
version of the big twin. This particular bike may not represents a typical dyno run for a
stock California bike. Things like air filter, ignition timing, spark plugs and carburetor
adjustments can have quite an impact upon engine performance.
RPMs
|
SAE
Corrected Horsepower |
Ft.
Lbs. Torque |
Notes
|
2000 |
19.7 |
51.9 |
|
2500 |
24.9 |
52.3 |
|
3000 |
30.1 |
52.7 |
Maximum Torque |
3500 |
34.0 |
51.1 |
|
4000 |
36.1 |
47.5 |
|
4500 |
38.1 |
44.5 |
|
5000 |
38.2 |
40.1 |
Maximum HP |
5250 |
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Stock Rev limiter |
As you can see, the California model bikes have much less power than
their 49-state cousins. |
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