Dart SHP cam bearing clearance

General engine tech -- Drag Racing to Circle Track

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RT Machine
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Dart SHP cam bearing clearance

Post by RT Machine » Mon Nov 06, 2017 7:05 am

Finalising build on 400 CI dart SHP PRO SBC, cam clearance in my opinion is too large at .003" .
Cam bores measure perfect at 2.120", solid roller journals all 1.9483" , cam clearance checked with precision go plug gauge dia. of 1.9513"
Dart spec sheet specifies cam journal dia. at 1.949" ! whereas BB cam journal is 1.948" nominal, when trial fitting cam I could tell it was way too loose for my liking.
I cant find any .001 undersize bearings for this application, I have contacted Dart, waiting for response.
All other Dart blocks ive built have had close to .002" cam clearance with the Durabond bearings supplied with the block.

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