Ollies930 Posted September 20, 2014 Report Share Posted September 20, 2014 Has anyone tried different combustion chamber shapes without altering compression to see how the power curve was affected? Most of the interchangeable domes I see advertised are very similar to the original factory shape. From what I have read about the most recent two stroke 125 and 250cc GP engines (early 2000's), they favored a shallow, flat roof (or torroidal roof if you ran a Honda), with the sides ending about parallel with the stroke and squish bands about 50% of bore with tightest possible squish following the piston dome and running sharp edges at the squish/combustion chamber interface. Has anyone ever seen anything or tried something like that for a Banshee? Might be worth a bit of power? Quote Link to comment Share on other sites More sharing options...
91coupemike Posted September 21, 2014 Report Share Posted September 21, 2014 Cont really get much better then a hemiphrical dome shape. It doesn't have valves, so you're not worried about flow. If you have tight spots and open spots you'll have a higher change for incomplete combustion and IMO a greater chance for pre-ignition from hot spots. The piston is domed, so you'd want a domes combution chamber. Quote Link to comment Share on other sites More sharing options...
03DMshee Posted September 21, 2014 Report Share Posted September 21, 2014 Fuck her right in the pussy..... Quote Link to comment Share on other sites More sharing options...
apeik Posted September 21, 2014 Report Share Posted September 21, 2014 http://www.bansheehq.com/forums/index.php?/topic/169536-421-cub-squish Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted September 21, 2014 Report Share Posted September 21, 2014 These things are old. Nobody doing anything cool to them anymore...... Haha Quote Link to comment Share on other sites More sharing options...
registered user Posted September 21, 2014 Report Share Posted September 21, 2014 most everything has been tried i would imagine. even nonsense like swirl marks. make some good hemi domes and call it a day Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted September 21, 2014 Report Share Posted September 21, 2014 ^ Quote Link to comment Share on other sites More sharing options...
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