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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #21  
Old 21st October 2018
rejeanprimeau's Avatar
rejeanprimeau rejeanprimeau is offline
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Just don't lug it. I've run 87 in my 10.5 and no problem, just keep the rev over 3000rpm to 4500 when braking it. You can ping any engine going 950 rpm in 5 gears.
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  #22  
Old 21st October 2018
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I done mine in a week end. No issues at all.
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  #23  
Old 22nd October 2018
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Quote:
Originally Posted by Scuba10jdl View Post
In a 10:1 stock cammed street motor? He doesn't even need anything beyond 91 premium pump gas unless he's got some shit he's not telling us.

People overthink shit and get all in a tizzy over nothing. It's not like he's building a monster race motor.
Keith Black..
KaBoom pistons,
Cannot handle ANY pinging and run hotter than normal pistons so it pings quite easily..

Will be retarding the spark quite a bit, so 91 seems safe..
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