Engine Specifications
GENERAL SPECIFICATIONS
| Engine | Net HP At RPM | Torque (Ft. Lbs. at RPM) | Compr. Ratio | Bore | Stroke | Displ. Cu. Ins. |
|---|---|---|---|---|---|---|
| 255" | 122@3800 | 200@2200 | 8.8:1 | 3.68" | 3.00" | 255 |
| 302" | 135@3600 | 240@1800 | 8.4:1 | 4.00" | 3.00" | 302 |
| 351" | 149@3300 | 288@1800 | 8.3:1 | 4.00" | 3.50" | 351 |
VALVES
| Engine & Valve | Head Diam. | Face Angle | Seat Angle | Seat Width | Stem Diameter | Stem Clearance | Valve Lift | |
|---|---|---|---|---|---|---|---|---|
| 255" | Int. | 1.770" | 44° | 45° | .060-.080" | .3416-.3423" | .0010" | .3753" |
| Exh. | 1.439" | 44° | 45° | .060-.080" | .3411 -.3418" | .0015" | .3753" | |
| 302" | Int. | 1.770" | 44° | 45° | .060-.080" | .3416-.3423" | .0027" | .3753" |
| Exh. | 1.463" | 44° | 45° | .060-.080" | .3411-.3418" | .0032" | .3909" | |
| 351" | Int. | 1.794" | 44° | 45° | .060-.080" | .3416-.3423" | .0010-.0027" | .4108" |
| Exh. | 1.468" | 44° | 45° | .060-.080" | .3411.3418" | .0015-.0032" | .4108" | |
PISTONS, PINS, RINGS
| Engine | PISTONS | PINS | RINGS | |||
|---|---|---|---|---|---|---|
| Clearance | Piston Fit | Rod Fit | Rings | End Gap | Side Clearance | |
| 255" | .0018-.0026" | .0002-.0004" | Press Fit | Comp. Oil |
.010-.020" .015-.055" |
.002-. 004" Snug |
| 302" | .0018-.0026" | .0002-.0004" | Press Fit | Comp. Oil |
.010-.020" .015-.055" |
.002-.004" Snug |
| 351" | .0018-.0026" | .0003-.0005" | Press Fit | Comp. Oil |
.010-.020" .015-.055" |
.002-.004" Snug |
CRANKSHAFT MAIN & CONNECTING ROD BEARINGS
| Engine | MAIN BEARINGS | CONNECTING ROD BEARINGS | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Journal Diam. | Clearance | Thrust Bearing | Crankshaft End Play | Journal Diam. | Clearance | Side Play | |||
| 255" | 2.2482-2.2490" | .0001-.0015"(1) | No. 3 | .004-.008" | 2.1228-2.1236" | .0008-.0015" | .010-.020" | ||
| 302" | 2.2482-2.2490" | .0001-.0015"(1) | No. 3 | .004-.008" | 2.1228-2.1236' | .0008-.0015" | .010-.020" | ||
| 351" | 2.9994-3.0002" | .0008-.0015" | No. 3 | .004-.008" | 2.3103-2.3111' | .0008-.0015" | .010-.020" | ||
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CAMSHAFT
| Engine | Journal Diam. | Clearance | Lobe Lift | ||
|---|---|---|---|---|---|
| 255" | |||||
| Jrnl. | 1 | 2.0805-2.0815" | .001-.003" | Int..2375" | |
| 2 | 2.0655-2.0665" | Exh.2375" | |||
| 3 | 2.0505-2.0515" | ||||
| 4 | 2.355-2.0365" | ||||
| 5 | 2.0205-2.0215" | ||||
| 302" | Same as 255" | .001-.003" | Int..2375" | ||
| Exh..2475" | |||||
| 351" | Same as 255" | .001-.003" | Int. 2.600" | ||
| Exh. 2.600" | |||||
VALVE SPRINGS
| Engine | Free Length | PRESSURE (LBS.) | |
|---|---|---|---|
| Valve Closed | Valve Open | ||
| 255" | |||
| Int. | 2.04" | 74-82@1.78" | 190-212@1.36" |
| Exh. | 1.85" | 76-84@1.60" | 190-210@1.20" |
| 302" | |||
| Int. | 2.04" | 74-82@1.78" | 196-212@1.36" |
| Exh. | 1.85" | 76-84@1.60" | 190-210@1.20" |
| 351" | |||
| Int. | 2.04" | 74-82@1.78" | 196-212@1.36" |
| Exh. | 1.85" | 76-84@1.60" | 190-210@1.20" |