Pontiac Ponti 1977 305 145HP Specs
Pontiac Ponti 1977 305 145HP engine specs: 305 ci (5L), 8-cylinder, 3.736" bore x 3.484" stroke, 9.241:1 compression.
Dimensions
| Displacement | 305 ci / 5 L |
|---|
| Bore | 3.736" |
|---|
| Stroke | 3.484" |
|---|
| Cylinders | 8 |
|---|
| Configuration | V8 |
|---|
| Compression ratio | 9.241:1 |
|---|
| Rod length | 5.7" |
|---|
| Rod ratio | 1.636 |
|---|
| Bore/stroke ratio | 1.072 |
|---|
Construction
| Block material | cast iron |
|---|
| Head material | cast iron |
|---|
| Valvetrain | OHV |
|---|
| Fuel type | gas |
|---|
| Advertised HP | 145 hp |
|---|
| Years | 1977 |
|---|
What these numbers mean
| Bore/stroke character | 1.072 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|
| Mean piston speed at 6,000 RPM | 3,484 ft/min — conservative for a street engine |
|---|
| Rod ratio | 1.636 — moderate — the range most production V8s fall in |
|---|
| Displacement per cylinder | 38.1 ci |
|---|
| Static compression | 9.241:1 — low by modern standards, generally happy on regular pump fuel |
|---|
Cylinder head
| Intake valve diameter | 1.725" |
|---|
| Exhaust valve diameter | 1.505" |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Similar engines
← All Pontiac 305ci engines