Hand Finished CNC'd Heads
 

Hi,
Just wanting to know whats the Beneifit of having hand finished CNC heads?
Also would it be better to send my CNC 243's to a hand porter rather than the same CNC porter?

thanks folks any info would be a godsend

A cnc machine can only do much where as a hand porter can take the head further and pick up more flow if he knows what he's doing. To be honest save your money and buy a nice set of aftermarket castings. When you start with junk you end up with junk. Not saying 243 heads are junk far from it but I'm sure you get the point.

What 2SLOW really means is aftermarket castings like TRICKFLOW have a 13degree valve angle (15 is stock) and MAST heads have an 11 degree angle
this tends to unshroud the valve w/smaller cc chambers and the shape of the
runner as it approaches the bowl area is much improved which is why a 215-220 cc runner can flow well above 300cfm. Basically an aftermarket casting
starts where most 243 heads end

Send your heads to TEA or WCCH.. nuff said.

i'll disagree with this.
what do you think we all did before there were any aftermarket castings available?you can make plenty of power on ported stock castings.yes the aftermarket choices are stronger and may ultimately make more power,but dollar per HP ported stock castings are hard to beat,especially for a N/A street/strip application..
all depends on your goals and how much money you want to spend.
do a search to see how much power you can make with 243s or even 241s when properly ported.

I think you need to read the fact his heads are already cnc machined. Spending more money on them is pointless when you can buy a superior product.

i see what your saying,my bad.
in that case i wouldn't touch them.if there properly machined,hand finishing won't give him that much more power.certainly not enough to justify the cost.

Cost for the gain its probaly not worth it. Also just because a guy has a dremmel an says he hand finishes heads/ports them doesnt mean he knows what he is doing. The guys who really know how to finish are going to be expensive.