If you mean machining as in milling the head surface, there's not much to be gained there. And the valve timing would change, but only slightly. .010" off the head surface might affect the cam timing ever so slightly. Raising the compression this way is also not going to amount to a whole lot.

 

 

I'm not sure how much you can shave modular heads, and if it's just .010 or .020", that's not a huge compression bump, surely not enough to even feel or see on a dyno.

 

 

I agree!

Be advised that Ford has special head gaskets for heads that are milled. I assume they are thicker to add the thickness that was milled off.

I seen 3 different part numbers....Probably for different amounts shaved off head.

there should also be specifications for max amount that can be removed from head. Sorry I don't know what that spec is.

 

Try Modular Head Shop in Florida, they could probably be more specific and offer any parts you may need they make a ton of modular engine parts themselves. I wanted to actually do their "Stock mod package" that consists of bowl porting, bronze valve guides, regrinding stock valves, performance valve job, surfacing and assembly is $1,500 and upgraded valve springs are $236.00 I never did it because they are in FL.

 

 

I looked into a lot of performance items when I did my engine rebuild and it basically came down to the fact that I would only see slight gains with bolt on parts. IE: headers, exhaust, tune. The engine was bored over to accept the new pistons but not much and I bet I only gained 10 more rwhp if that from the engine bore. Realistically if you are wanting more power your gonna have to step into a diesel or look at the newer 3v v10's with the newer transmission. My brother has a 2009 V10 and to be honest our trucks feel about the same power wise, his transmission is much nicer for towing.

 

 

Just curios did you ask any of these machine shop and engine builders about cams? Do they make any aftermarket cams for the 10?