panic wrote:Part of the reason why an exact answer isn't practical is that some engines will suffer more from a dome, not only because the dome masks flow and flame travel (duh), but also that it changes the effective overlap, so if the cam was highly developed for the engine before and you go to a flat dome your overlap may now be excessive (higher, narrower powerband). Of course, if the cam was mild before it may help here!
bigjoe1 wrote:Every real big horsepower engine I have ever made had a dome of some sort. I do not feel that the dome is bad for high horsepower. I do realize there are bad dome shapes, but when it takes high compression to get the power up where you want it. I go for the domes every time.
robert1 wrote:Cup engines had domes until the compression ratio was dropped.
stealth wrote:Thinking about this if I was going to rev the piss out of an engine at over 9000 rpm for 4+hours straight, along with allowing for light weight rods, small wrist pins, Honda journal, etc..etc.. I might want the lightest piston I could get in there (dish)…while still keeping my desired cp ratio(Dome..extra weight?)