Madhatter wrote:
Fancy!
28 is exactly where my heads are.
Nice, great minds think alike... I hope
Shame there isn't more room to make them bigger, the bore being much bigger could use larger valves, but the head is limited and that's really due to the bore centerline. Ferrari changed that with the F430 and it's very obvious how much bigger the ports and valves got. Really wish I could get them flowed before assy... going to make a couple calls and see if it can be done. In the meantime I digitized the ports and can always run the CFD in virtual world. The beauty there is being able to manipulate atmospheric conditions, as in mimic underhood temps, pressure and humidity. Heck I can even add in fuel and check wall conditions and mixture.[/quote]
Now remember that to need a 28mm throat I went to a 34mm valve...but I like largish valves vs port size to keep the velocity up which generally helps the low to mid range cylinder filling.