1958 Dodge/Mopar 230 L6 Engine Specificatons
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| Type | L head Straight Six |
| Bore and stroke | 3.25 x 4.63" |
| Piston Displacement (cu. Inch) | 230.2 |
| Taxable Horsepower (ama) | 25.35 |
| Compression Ratio | 8.0 to 1 |
| Compression Pressure (speed minimum 150 rpm, plugs removed, wide open throttle) |
120 to 150 lbs |
| Maximum Brake horse power at 3600 rpm | 123 |
| Firing order | 1-5-3-6-2-4 |
| Camshaft | |
| Drive | Chain |
| End Paly | .002-.006" |
| Radial Clearance | .001-.003"" |
| Camshaft Journals | |
| Diameter and Length | No.1 1.998-1.99 x 7/8" |
| No.2 1.982-1.983 x 3/4" | |
| No.3 1.967-1.968 x 3/4" | |
| No.4 1.951-1.952 x 3/4" | |
| No.5 1.4355-1.4365 x 15/16" | |
| Crankshaft | |
| Type | Counter Balanced |
| Bearings | replaceable |
| End Play | .003-.007" |
| Radial Clearance | .0005-.0015" |
| Connecting Rods | |
| Length (center to center) | 7 13/16" |
| Diameter and Length | 2 1/16 x 1" |
| Connecting Rod Bushing | |
| Type | Bronze |
| Diameter and Length | 55/64 x 1 1/8'' |
| Pistons | |
| Clearance (3/4 inch from bottom on thrust face) | .002 to .0012" |
| Weight (Standard through all oversize) | 16 oz |
| Ring Groove Width (Compression) | .0169" |
| (oil) | .172" |
| Valves (intake) | |
| Head Diameter | 1 17/32" |
| Lift | 23/64" |
| Stem Diameter | .340 to .341" |
| Stem to Guide Clearance | .001 to.003" |
| Valves (Exhaust) | |
| Head Diameter | 1 13/32" |
| Lift | 23/64" |
| Stem Diameter | .340 to .341" |
| Stem to Guide Clearance | .003 to.005" |
| Distributor For 6 Cylinder | |
| Model | IBR-4001 |
| Rotation | Clockwise |
| Advance Control | Automatic |
| Point Gap | .018 to .022" |
| Breaker Arm Spring Tension | 17 to 20 |
| Contact Dwell (degrees) | 39+/- 3 Deg |
| Automatic Advance curve (Distributor speed) | |
| 250 to 450 | 0 Deg |
| 450 | 0 to 2 Deg |
| 1150 | 5.5 to 7.5 Deg |
| 1800 | 7.5 to 9.5 Deg |
| Vacuum Advance Curve | |
| Manifold vacuum in inches of mercury | |
| 5.25 to 6.75 | 0 Deg |
| 10 | 3.5 to 5.5 Deg |
| 16 | 8.5 to 10.5 deg |
| Condenser Capacity (Microfarads) | .25 to .285 |
| Timing Mark location (marks 1 deg apart) | Vibration Damper |
| Engine Idle Speed (RPM) | 450 to 500 |
| Firing Order | 1-5-3-6-2-4 |
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