| Jeep Engines: AMC 4.2L - 258 |
| History The AMC 258 cubic inch engine is a venerable workhorse that began production in ___ and continued through ____ with only a weight reduction in ___. |
| Tips on building The AMC 258 is primarily used as a torque motor, though it has the potential to run through higher rpm ranges. First need to improve ignition... TFI ignition... other ignitions modules rev limiters First need to improve exhaust: header, exhaust types... torque = 2.5" - 2.75" tail pipes mufflers... types, economy tips and tailpipes Next order of buisness improve intake system: intake (cliff or offy) will give improvements... build across intire range carb: types: carb formula mc2100/2150 edel 500 holley 290 & 450 others Heart of the engine: Camshaft Many companies make camshafts for this motor. such as: this is what they do: comp cams crane cams clifford Head: debur, port, polish, 4.0L head Finally, little things: air filter mini snorkel snorkel ram air |