Ok i thk my head has gone porous, basically im getting oil in my radiator! But at a very low rate like the surface of radiator gets covered over in a matter of few weeks, is this a porous head?
Ok next question what is the difference between a SBD hand ported head and a SBD sprint spec head?
When porting a XE head you simply polish the combustion chamber, inlets ports making it knife edge or is there alot more involved? what do you do to the exhaust ports