Identify a cam by the casting marks
02-15-2019, 08:09 PM
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Identify a cam by the casting marks
added I bought a project car and trying to figure out what cam is in it. It is a new 383 stroker motor with Chevy performance parts. The cam has 586 WB15 and 190 98R stamped on the end. Can anyone confirm what cam this is? I am trying to figure out what torque converter stall I need.
Thanks
Last edited by Anthony Vegas; 02-15-2019 at 08:11 PM. Reason: Added photo
02-15-2019, 08:34 PM
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Re: Identify a cam by the casting marks
The R probably means a roller cam. Were there roller lifters on the cam?
586 is the last part of GM's part number for an LT4 Hot Cam. Lobe lift should be 0.328. Duration at 0.050 should be 218/228
A vernier caliper and a dial gauge can tell you the grind when installed in an engine with a degree wheel on it. You can use them to determine lobe lift and duration.
Without knowing where the engine makes torque, converter stall selection is a guess. The same cam in a 383 and a 350 will make torque at different rpms.
586 is the last part of GM's part number for an LT4 Hot Cam. Lobe lift should be 0.328. Duration at 0.050 should be 218/228
A vernier caliper and a dial gauge can tell you the grind when installed in an engine with a degree wheel on it. You can use them to determine lobe lift and duration.
Without knowing where the engine makes torque, converter stall selection is a guess. The same cam in a 383 and a 350 will make torque at different rpms.
02-15-2019, 08:57 PM
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Re: Identify a cam by the casting marks
The R probably means a roller cam. Were there roller lifters on the cam?
586 is the last part of GM's part number for an LT4 Hot Cam. Lobe lift should be 0.328. Duration at 0.050 should be 218/228
A vernier caliper and a dial gauge can tell you the grind when installed in an engine with a degree wheel on it. You can use them to determine lobe lift and duration.
Without knowing where the engine makes torque, converter stall selection is a guess. The same cam in a 383 and a 350 will make torque at different rpms.
586 is the last part of GM's part number for an LT4 Hot Cam. Lobe lift should be 0.328. Duration at 0.050 should be 218/228
A vernier caliper and a dial gauge can tell you the grind when installed in an engine with a degree wheel on it. You can use them to determine lobe lift and duration.
Without knowing where the engine makes torque, converter stall selection is a guess. The same cam in a 383 and a 350 will make torque at different rpms.
02-15-2019, 09:12 PM
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Re: Identify a cam by the casting marks
The picture shows the "Roller" rocker arms. Alky is asking about the lifters themselves. You need to put the intake manifold and see if there is a "Spider" bracket the holds the lifters or not.
Also, is that a crack between the two valve springs in the picture?
Also, is that a crack between the two valve springs in the picture?
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02-17-2019, 07:15 PM
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Re: Identify a cam by the casting marks
snap a pic of the other end and i can tell you if its a roller cam straight off the bat
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