They need alot of chamber work to get the same flow as a open chamber head. Just saying they are not for the common guy.
And you know this how? Have you ever gotton a 194 to flow this good,or any of your large chambers heads to flow this good?
Cc's do go up, but, still smaller than the larger chamber head.
So your overall compression is still higher than a larger chamber cyl head.
On the 194 heads I have had, no cracks, but never had luck using a 1.94" valve, too thin, hit water also..Maybe that was just me cutting too much?
They are still a viable option for a guy that wants to raise compression,w/out having to change pistons.Most cylinder head work is not for the common guy anyways.
Who has a valve grinding set @ home,guide & seat machine ?etc,etc
If you do not know how to port, you can definately kill the airflow of any cylinder head,& also, if you do not know what angles to cut,widths,throats etc., you can absolutely kill airflow,so, just saying,it's not for the common backyard mech.Another choice that nobody mentions is the have the large chmaber head welded up a bit to increase quench area & increase compression.
MBHD
