101questions Posted June 3, 2020 Report Share Posted June 3, 2020 I’m running a 421 With 35pwk ,shearer exhaust small bore, 68mm cylinders, big bore 9 degree 21cc domes what you think I should jet it to? 600ft above sea level Quote Link to comment Share on other sites More sharing options...
Toybreaker Posted June 3, 2020 Report Share Posted June 3, 2020 Sully? what were you running on yours? Quote Link to comment Share on other sites More sharing options...
101questions Posted June 3, 2020 Author Report Share Posted June 3, 2020 Vf4 reeds 8 hours ago, 101questions said: I’m running a 421 With 35pwk ,shearer exhaust small bore, 68mm cylinders, big bore 9 degree 21cc domes what you think I should jet it to? 600ft above sea level Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted June 3, 2020 Report Share Posted June 3, 2020 I’m running a 421 With 35pwk ,shearer exhaust small bore, 68mm cylinders, big bore 9 degree 21cc domes what you think I should jet it to? 600ft above sea levelJust start at 175 and 55 and work from there. Envoyé de mon SM-G965W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
dano3 Posted June 3, 2020 Report Share Posted June 3, 2020 im running a very similar setup and at 75* F, same elevation im at 155M, 45P, and a CEL needle. starting rich and dropping down at increments help a lot with learning how the jet changes affect the response and overall behavior of the setup. Quote Link to comment Share on other sites More sharing options...
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