Mazda f2 8v, some guidance and info please.

Got a link to the sectioned 12v head?

I may do, if not, I'll go find it. Bare with me, I'll post up a link asap

Yep, had it saved for future reference.

http://www.mx6.com/forums/showthread.php?t=194655

Anyone feel like measuring the inlet port on an f2 12v head for me? As in the approximate area of the opening. The 12v ports have different spacing to the 8v and are wider (for obvious reasons) but appear to be shorter in height compared to the 8v. Just curious as to the difference in port size between the two given that the valve sizes are quite close.

I'm also wondering peoples thoughts as to whether shaving/smoothing down the protrusion between the inlet and exhaust would be of any benefit or not? Yes it'd make for slightly lower compression, but that can be counteracted. Here's a PIC of the 8v head for reference. http://www.new-engineparts.com/pic/big/174_0.jpg

I think you'd want that protruded area left alone for squish. Maybe radius the edge to make sure it's not too hot-spot prone to reduce chances for detonation.

Yeah, don't remove that. That's your quench area and it's helping you.

I wasn't thinking of completely removing it, just smoothing it out a bit. Given I'm not taking this head to its upper limit I guess I'll be leaving well enough alone.