Cadillac engine knowledge
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| − | Basic Engine Specifications | + | ==Basic Engine Specifications== |
| − | Tune-up Specifications: | + | ==Tune-up Specifications:== |
Year--Disp.-Fuel-Sparkplugs-Dist.-Timing BTDC-Intake opens-Idle speed | Year--Disp.-Fuel-Sparkplugs-Dist.-Timing BTDC-Intake opens-Idle speed | ||
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| − | General Specifications: | + | ==General Specifications:== |
Year-Disp.-Fuel-Horsepower-Torque@RPM-BorexStroke-Comp. ratio | Year-Disp.-Fuel-Horsepower-Torque@RPM-BorexStroke-Comp. ratio | ||
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| − | Fastener Torque Specifications: | + | ==Fastener Torque Specifications:== |
Year-Disp.-Head-Rod-Main-Crank damper-Flywheel-Intake-Exhaust | Year-Disp.-Head-Rod-Main-Crank damper-Flywheel-Intake-Exhaust | ||
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| − | Identification: | + | ==Identification:== |
'68-'69 472: 1486238 | '68-'69 472: 1486238 | ||
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| − | Crank Casting #: | + | ===Crank Casting #: === |
'68-'74 472: 1486424 | '68-'74 472: 1486424 | ||
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'80-'85 368: 1609142 | '80-'85 368: 1609142 | ||
| − | Stroke: (stroke can be measured through spark plug hole if it will turn) | + | |
| + | ===Stroke:=== | ||
| + | |||
| + | (stroke can be measured through spark plug hole if it will turn) | ||
'68-'74 472, 77-'79 425, '80-'85 368: 4.060" (less than 4 1/8") | '68-'74 472, 77-'79 425, '80-'85 368: 4.060" (less than 4 1/8") | ||
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| − | Head Casting Number: (usually in the center of the head under the valve cover): | + | ===Head Casting Number:=== |
| + | (usually in the center of the head under the valve cover): | ||
'68-'69 472: 1486250 | '68-'69 472: 1486250 | ||
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http://www.cad500parts.com/tech/EngineIDPages.pdf | http://www.cad500parts.com/tech/EngineIDPages.pdf | ||
| − | Modifications and Swapping. | + | ==Modifications and Swapping.== |
The biggest gains in power output come with cylinder head work. Pre-'74 heads are small chamber 76 cc's and are good for around 12 to 1 compression with race gas. The '74 and later heads have larger 120 cc chambers and are a better choice for a pump gas torquer with an 8.5 to 1 compression ratio. The best bet for a pump gas premium street torque monster is a set of '77-'79 425 heads. These offer an honest 10:1 compression ratio on both 472 and 500 engines. Big gains can be made by adding larger valves and induction hardened seats. The valve sizes can be boosted to 2.08"/1.70" without worry of hitting the water jackets. The usual porting, valve unshrouding and minor bowl modifications will work, although the short-side radius should be left alone to avoid drastic differences in airflow. Roughly 20 horses can be gained by this work alone and most of that comes from the larger valves. | The biggest gains in power output come with cylinder head work. Pre-'74 heads are small chamber 76 cc's and are good for around 12 to 1 compression with race gas. The '74 and later heads have larger 120 cc chambers and are a better choice for a pump gas torquer with an 8.5 to 1 compression ratio. The best bet for a pump gas premium street torque monster is a set of '77-'79 425 heads. These offer an honest 10:1 compression ratio on both 472 and 500 engines. Big gains can be made by adding larger valves and induction hardened seats. The valve sizes can be boosted to 2.08"/1.70" without worry of hitting the water jackets. The usual porting, valve unshrouding and minor bowl modifications will work, although the short-side radius should be left alone to avoid drastic differences in airflow. Roughly 20 horses can be gained by this work alone and most of that comes from the larger valves. | ||
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| − | Caddy engine parts sources: | + | ==Caddy engine parts sources:== |
Cad Company [http://www.cad500parts.com/] | Cad Company [http://www.cad500parts.com/] | ||
Maximum Torque Specialties [http://www.500cid.com/] | Maximum Torque Specialties [http://www.500cid.com/] | ||
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