Cadillac engine knowledge
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[[Image:Cadsuburban.jpg|frame|A Cadillac engine in an early Suburban]] | [[Image:Cadsuburban.jpg|frame|A Cadillac engine in an early Suburban]] | ||
| − | [[File:Caddyv12.jpg|thumb|500px|Mid-'60s Caddy V12 60 degree | + | [[File:Caddyv12.jpg|thumb|500px|Mid-'60s Caddy V12 60 degree SOHC engine- never reached production]] |
==1946-'60== | ==1946-'60== | ||
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<td align="center" ><b>5°</b></td> | <td align="center" ><b>5°</b></td> | ||
</tr></table></font><br> | </tr></table></font><br> | ||
| + | '''Bold text''' | ||
==1968-'76 general engine specifications== | ==1968-'76 general engine specifications== | ||
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==Modifications and swapping== | ==Modifications and swapping== | ||
| − | [[File:Mts cad head.jpg|thumb|left|600px|MTS custom aluminum 76cc "FR" head, ~$3500/pair ca. 2012]] <br style="clear:both"/> | + | [[File:Mts cad head.jpg|thumb|left|600px|Cadillac HP MTS custom aluminum 76cc "FR" head, ~$3500/pair ca. 2012]] <br style="clear:both"/> |
===Heads=== | ===Heads=== | ||
| − | The biggest gains in power output come from aftermarket cylinder heads (see photo). Stock heads can also be ported for more power. MTS and others do this type of work. Pre-1974 heads are small chamber 76cc and are good for around 12-13 to 1 compression when a flat top piston is fitted. Race gas, alcohol or propane fuel must be used. | + | The biggest gains in power output come from aftermarket cylinder heads (see photo). Stock heads can also be ported for more power. MTS/CHP and others do this type of work. Pre-1974 heads are small chamber 76cc and are good for around 12-13 to 1 compression when a flat top piston is fitted. Race gas, alcohol or propane fuel must be used. |
The 1974 and later open chamber heads have 120cc chambers giving compression ratios of 7.5-9 to 1 depending on the piston used. | The 1974 and later open chamber heads have 120cc chambers giving compression ratios of 7.5-9 to 1 depending on the piston used. | ||
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===Intake=== | ===Intake=== | ||
| − | The stock intakes used on the 472/500/425 engines leave a lot to be desired. They are a very low rise design, some are single plane, but not in a high performance sense. | + | The stock intakes used on the 472/500/425 engines leave a lot to be desired. They are a very low rise design, some are single plane, but not in a high performance sense. Also, the stock intake is of a "negative plenum" design in which the air/fuel mixture actually flows below the intake port, then back up to the port-not good for flow. It was made this way to clear the Eldorado hood, and consequently these aftermarket intake manifolds will not clear the stock Eldorado hood. |
| − | MTS, Edelbrock and others make aluminum aftermarket intakes that are better suited for high performance duty. | + | MTS/CHP, Edelbrock and others make aluminum aftermarket intakes that are better suited for high performance duty. |
| − | [[File:Mts single plane intake cad.jpg|thumb||left|600px|MTS single plane aluminum intake manifold]] <br style="clear:both"/> | + | [[File:Mts single plane intake cad.jpg|thumb||left|600px|MTS/CHP single plane aluminum intake manifold]] <br style="clear:both"/> |
===Block=== | ===Block=== | ||
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===Cam timing/degreeing=== | ===Cam timing/degreeing=== | ||
| − | The stock cam can benefit from advancing the cam timing 2 degrees, as these engines had retarded cam timing in stock form for emissions. Attach the degree wheel to the crank with a 9/16- | + | The stock cam can benefit from advancing the cam timing 2 degrees, as these engines had retarded cam timing in stock form for emissions. Attach the degree wheel to the crank with a 9/16-18 fine thread bolt. |
==Transmission bolt patterns== | ==Transmission bolt patterns== | ||
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==Cadillac engine parts sources== | ==Cadillac engine parts sources== | ||
*[http://www.cad500parts.com/ Cad Company] | *[http://www.cad500parts.com/ Cad Company] | ||
| − | *[http://www. | + | *[http://www.cadillachighperformance.com/ Formerly MTS - Now Cadillac HP ] |
*[http://www.cadillacperformanceparts.com/ Cadillac Performance Parts] | *[http://www.cadillacperformanceparts.com/ Cadillac Performance Parts] | ||
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