holy poop on a stick

thats exactly what I was after. Thanks DD I guess I just really suck @ the internet. Its not the exact pic I remember but very useful all the same.

Just talked to my mate he's apparently done heaps of a series before (I didn't know) so yeah its goanna be sweet as. Thanks again DD consider this thread obsolete

<-- wiki clicky, search for Porting

hey all looking for a little help.
A while ago I found a thread that had an excellent image of a cross section of an a series head that was talking about porting options I think. I can't remember any more about it and can't find the thread to save my life

does any one know what thread that pic is in?? or have similar pics of slices through a12 head or other a series heads?
I'm gettin a mate to put the ol a12 head on a flow bench and do some porting and I'd like to furnish him w as much info as possible before he whips out the grinder....

so any 1 got any experiences, things to look out for etc (My mate is a professional mechanic, has done this type of work for over 25years and knows his stuff, not so sure about A series tho so any help would be much appreciated.

Cheers, J