Identifying camshafts
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==OEM SBC roller cam== | ==OEM SBC roller cam== | ||
| − | [[File:Ft vs oem roller cam nose.jpg|thumb | + | [[File:Ft vs oem roller cam nose.jpg|thumb|450px|Flat tappet SBC cam, left; OEM hydraulic roller cam, right]] |
A cam made for use in a SBC that originally came with a hydraulic roller cam will have a step machined into the nose of the cam for the retainer plate. | A cam made for use in a SBC that originally came with a hydraulic roller cam will have a step machined into the nose of the cam for the retainer plate. | ||
| − | A cam without a step could still be a hydraulic (or solid) roller cam and it could still possibly be used in a late roller block | + | A cam without a step could still be a hydraulic (or solid) roller cam and it could still possibly be used in a late roller block by using a cam button to set the cam endplay instead of the factory thrust plate. The maximum lobe lift allowed is about 0.354" before the factory hydraulic roller lifters can lose contact with their retainers (aka "dogbones"). Aftermarket lifters are available that are longer and prevent this from happening. |
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| + | [[File:Cam button.jpg|thumb|left|400px|Special retainer and cam button for using a factory-type hydraulic roller cam in an older block]] | ||
| + | A factory-type hydraulic roller cam can also be used in an earlier block by using a spacer to take up the room the retainer uses, along with a cut down cam button. The spacer can be made by removing the ears off of a stock retainer plate, or a kit can be bought from [http://www.lingenfelter.com/mm5/merchant.mvc? Lingenfelter] that has the spacer and special cam button included. | ||
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