just a tuning thought.....

[Suicide.Veteran]

has anyone tried running flat top pistons with a raised quench area, with a shaved block or head, and machining small divets into the top ring groove to force the ring out on the compression stroke for better compression?

I doubt it, but I might try it..... on a spare KA n/a build.

I hope you can understand what I'm saying....LOL

[wankelTII]

im not really sure what you are saying, but anything that creates sharp edges or areas with lots of surface area compared to the amount of material actually there is a bad idea. It creates hot areas and causes pre ignition.

Also if it isnt done in new engines from the factory or by really high end reputable race teams then i would stay away from it, there is either some drawback that isnt worth the trade off or it doesnt work.