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View Full Version : xe head skimming


pie
25-06-12, 12:14 PM
how much meat should be on normal coscast head befor skim?

any info pics would be great

thanks
:thumb:
mowgli
25-06-12, 12:48 PM
try asking mr steveboyslim on mig.
pie
25-06-12, 04:02 PM
this is the head:

im thinking thicker head gasket is needed?

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/598702_3479137144250_117017507_n.jpg

https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash3/539641_3479136024222_492899264_n.jpg
mowgli
25-06-12, 07:39 PM
seriously, mr boy slim is the most likely to have the correct dimension info.
Iain
25-06-12, 07:45 PM
Doesn't Haynes have min and max thickness? Or is it just min?
Paul
25-06-12, 09:15 PM
He does have a measurement. Iv forgotten it.
swedge
25-06-12, 09:38 PM
Haynes does have it as I've seen it before but now can't find it
pie
26-06-12, 11:06 AM
steve work it out that my head has had 0.15mm taken off over its life which left me with

135.45 from top off head face to gasket face

with my pistons it leaves me with a static ratio of 13.1 which aint good

not my pic (bloke on mig uses same pistons)
https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-snc6/282746_3458339504322_1887686753_n.jpg

what would be my next step to do
Iain
26-06-12, 01:08 PM
You looking to lower the CR? Thicker headgasket (Cometic), machine the pistons or get a new head?
pie
26-06-12, 01:11 PM
ya lower 13.1 is way to high for a xe lol

pistons are brand new dont fancy machining them

i dout these many heads out there whch aint been skimmed
pie
26-06-12, 01:19 PM
what size gasket would be needed to make up for whats been skimmed off 0.15
Iain
26-06-12, 01:26 PM
Try tinkering with this calculator: http://www.csgnetwork.com/compcalc.html

I used a thicker MLS Cometic gasket to lower the compression on mine but they're about £100.
pie
26-06-12, 01:43 PM
kool will check it late iain, as im on the i fail atm lol
swedge
26-06-12, 04:52 PM
i havea head thats never been skimmed, its currently being p&p'd