Default Six Cylinder Engines 

Old 01-22-2012, 03:49 PM   #1
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Vehicle(s): 1979 Jeep CJ5 with 304 V8, T18 Transmission, Dana 20 Transfer case with TeraLow 3:1 gears, 4.88 axle gears, Detroit Locker up front and Ox Locker in back with 1 piece axle shafts, 36" SuperSwamper SX Tires, Shackle reversal, MileMarker Hydraulic winch, MSD 6A ignition.
 
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Dauntless” Buick 225
V6 Engine


The Dauntless V6 engine was used in some CJ5's and CJ6's from 1966 to 1971. It is called an “odd fire” V6. It is a 90 degree V6 that is basically a V8 with 2 cylinders removed. Because the crankshaft was not changed to even out the rotation of the cylinders this V6 this engine has a distinctive rumble.
The 225 has 3 main bearings.



Bore – 3.75 inches
Stroke – 3.4 inches
Compression – 9:1
Horsepower - 160


Information for this post was obtained from Novak's web site
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Default Amc 232 

Old 01-22-2012, 03:51 PM   #2
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AMC 232
Strait Six


When AMC bought Kaiser Jeep in the early '70s AMC made some changes to the CJ model line. The most important change was to lengthen the hood 3 inches in 1972. This was done to install the longer AMC engines. In 1972 the standard engine was the AMC 232. It was available until 1979. The 232 strait 6 produced much less horsepower than the Dauntless V6.
The 232 has 7 main bearings.




Bore: 3.75"
Stroke: 3.5"
Displacement: 232/3802 (cu in/cc)
Compression Ratio: 8.0:1
Main Bearings: 7
Net Horsepower: 100 @ 3600 rmp
Net Torque: 185lb/ft @ 1800 rpm
Carb: 1bbl
Intake Valves:
Head dia: 1.787"
Lift: 0.372"
Exhaust Valves:
Head dia: 1.406"
Lift: 0.372
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Last edited by BusaDave9; 01-22-2012 at 09:27 PM..

 

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Default Amc 258 

Old 01-22-2012, 03:52 PM   #3
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AMC 258
Strait Six


The AMC 258 was based on the 232. The stroke was increased to bring the displacement to 258 cubic inches. The 258 has a reputation of a strong, torquey, reliable motor. The 258 has 7 main bearings.


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marcaurell's AMC 258

Bore: 3.75 inches
Stroke: 3.9 inches
Compression: 8.3:1 (after '82 compression was 9.2:1)
Bore: 3.75"
Stroke: 3.90"
Displacement: 258/4299 (cu in/cc)
Main Bearings: 7
Net Horsepower: 110 @ 3500 rmp
Net Torque: 195lb/ft @ 2000 rpm
Carb: 1bbl
Intake Valves:
Head dia: 1.787"
Lift: 0.372"
Exhaust Valves:
Head dia: 1.406"
Lift: 0.372
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Last edited by BusaDave9; 01-22-2012 at 09:25 PM..

 

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