Buick 1979 403 175HP Specs
Buick 1979 403 175HP engine specs: 403 ci (6.6L), 8-cylinder, 4.351" bore x 3.385" stroke, 9.181:1 compression.
Dimensions
| Displacement | 403 ci / 6.6 L |
|---|
| Bore | 4.351" |
|---|
| Stroke | 3.385" |
|---|
| Cylinders | 8 |
|---|
| Configuration | V8 |
|---|
| Compression ratio | 9.181:1 |
|---|
| Rod length | 6.002" |
|---|
| Rod ratio | 1.773 |
|---|
| Bore/stroke ratio | 1.285 |
|---|
| Piston deck clearance | 0.002" |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | gas |
|---|
| Advertised HP | 175 hp |
|---|
| Years | 1979 |
|---|
What these numbers mean
| Bore/stroke character | 1.285 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|
| Mean piston speed at 6,000 RPM | 3,385 ft/min — conservative for a street engine |
|---|
| Rod ratio | 1.773 — long — less side loading on the cylinder wall, favours high RPM |
|---|
| Displacement per cylinder | 50.4 ci |
|---|
| Static compression | 9.181:1 — low by modern standards, generally happy on regular pump fuel |
|---|
Cylinder head
| Intake valve diameter | 2" |
|---|
| Exhaust valve diameter | 1.5" |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Similar engines
Source: NHRA blueprints — nhra.net blueprints
← All Buick 403ci engines