I believe this is a (locator) for a machining fixture. I feel like its not doing any good in there.
Boss heads dont have it. Same chamber volume? The runner volumes are supposedly the same as 11-14 coyote yet flow more. port shape-velocity...
I cant find a pic of the 2015 heads. I see that the head gaskets are different and do not interchange. http://fordperformanceracingparts.com/parts/part_details.asp?PartKeyField=24683.
I read that they are cast with the same port layout as the CNC ported BOSS heads. I have no idea about the chambers. The cams are more agressive than previous coyotes but I havent seen anything if they will interchange..
The forced induction HP numbers for the 15's on pump gas are much higher than previous years also. The higher lift cams help but I dont see that being the biggest factor.
The chambers (and possibly improved cooling) are bound to be helping prevent preignition allowing more total advance. The dynamic compression is a little harder to figure but probably is another factor.
Any input??
