2-stroke-addict Posted July 22, 2021 Report Share Posted July 22, 2021 I have a 421 cub making 99.8hp on pump gas at 5800ft it has 35mm pwk carbs shearer s/b inframes and 4° advance on timing! If I get smaller cc domes to run 110 and bigger carbs will there be a significant gain in hp to justify the money spent? Will mostly be used for drag racing! Sent from my SM-G986U1 using Tapatalk Quote Link to comment Share on other sites More sharing options...
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