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20/21 cam emissions and interference
Does going from stock cam to 20/21 type (webcam) make meeting emissions more challenging? Suspect it might, and would be a small factor in these versus finding good stock ones. Still going with CIS.
Also, I’ll assume properly timed 20/21 cams “eliminates” chances for valve to piston interference? I’ll keep my rpm limited. I’ll be using JE pistons with 9.5 compression (98 mm short stroke).
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