CVO Technical > EVO

EVO Combustion Chamber mods

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MCE:
Has anyone tried moving the chamber wall away from the Intake valve on that "flat" portion?

Any EVO experts care to weigh in on this?

johnsachs:
Marked improvement depends on valve size. I always move a small amount of wall on the exhaust side, as the wall is closest there.  ;)
John

MCE:

--- Quote from: johnsachs on June 13, 2018, 06:52:58 PM ---Marked improvement depends on valve size. I always move a small amount of wall on the exhaust side, as the wall is closest there.  ;)
John

--- End quote ---

Thanks John, The intake was pretty close at 1.9, I took a little out but I didn't see any
gains. (I probably didn't take enough out) Just curious b/c they flowed a little less than
I expected (like 10 less).

prodrag1320:
I also un shroud the wall on EVO heads,especialy when bigger valves are used

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