15-09-2021, 06:24 PM
thanks chris, your reply is preity much the same as mine would be.
as the mane warp on a head, is in the centre. how did you measure 0.004
the obvious answer is if you can see 0.004 at the edge of the head or block, then surely if its bowed. this will be much more in the centre.
this is were i never use things like flat glass to do a home job, because you never really know what you end up with.
i would only use a machine company i trust to resurface things. as others rush a job. overheat the surface and it bowes again when cool.
and i prefur a surface finish to be done on a profesional surface grinder, rather than a miller. with a surface grinder, you can do a final grind after the head or block has cooled. FLATTER THE BETTER.
i have my own jones and shipman 540 surface grinder, sadly not needed to use it for many years. as all my heads and blocks now seal correctly. so need to recomision it some time. and i might start up resurfacing for people again after seeing what many are now charging.
tony
as the mane warp on a head, is in the centre. how did you measure 0.004
the obvious answer is if you can see 0.004 at the edge of the head or block, then surely if its bowed. this will be much more in the centre.
this is were i never use things like flat glass to do a home job, because you never really know what you end up with.
i would only use a machine company i trust to resurface things. as others rush a job. overheat the surface and it bowes again when cool.
and i prefur a surface finish to be done on a profesional surface grinder, rather than a miller. with a surface grinder, you can do a final grind after the head or block has cooled. FLATTER THE BETTER.
i have my own jones and shipman 540 surface grinder, sadly not needed to use it for many years. as all my heads and blocks now seal correctly. so need to recomision it some time. and i might start up resurfacing for people again after seeing what many are now charging.
tony