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...
ClaudeMachining Posted July 22, 2021 Report Share Posted July 22, 2021 5hp.Envoyé de mon SM-N975W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
RagunCajun Posted July 22, 2021 Report Share Posted July 22, 2021 To me, no. Which is why i built a bigger pump gas engine from the start. 1 Quote Link to comment Share on other sites More sharing options...
caleb90 Posted July 25, 2021 Report Share Posted July 25, 2021 im considering running av 100ll. soly for the purpose it lasts longer. Quote Link to comment Share on other sites More sharing options...
ClaudeMachining Posted July 25, 2021 Report Share Posted July 25, 2021 im considering running av 100ll. soly for the purpose it lasts longer. ??Envoyé de mon SM-N975W en utilisant Tapatalk Quote Link to comment Share on other sites More sharing options...
caleb90 Posted July 25, 2021 Report Share Posted July 25, 2021 1 minute ago, ClaudeMachining said: ?? Envoyé de mon SM-N975W en utilisant Tapatalk shelf life. i dont ride much. 1 Quote Link to comment Share on other sites More sharing options...
specialblend07 Posted July 26, 2021 Report Share Posted July 26, 2021 On 7/25/2021 at 7:07 AM, caleb90 said: shelf life. i dont ride much. Is this proven? Quote Link to comment Share on other sites More sharing options...
caleb90 Posted July 26, 2021 Report Share Posted July 26, 2021 av fuel good for 1 year or longer. pump gas 6 months max Quote Link to comment Share on other sites More sharing options...
specialblend07 Posted July 26, 2021 Report Share Posted July 26, 2021 1 hour ago, caleb90 said: av fuel good for 1 year or longer. pump gas 6 months max Shit I routinely use fuel that's 6 months + old. Quote Link to comment Share on other sites More sharing options...
kawa110 Posted July 26, 2021 Report Share Posted July 26, 2021 California pump gas good for 3 weeks at most. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
caleb90 Posted July 26, 2021 Report Share Posted July 26, 2021 22 minutes ago, specialblend07 said: Shit I routinely use fuel that's 6 months + old. that shit isnt orange by that point? Quote Link to comment Share on other sites More sharing options...
specialblend07 Posted July 26, 2021 Report Share Posted July 26, 2021 5 minutes ago, caleb90 said: that shit isnt orange by that point? No. I've never had an issue with snowmobiles that sit all summer with gas in them either. Quote Link to comment Share on other sites More sharing options...
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