What is the height of an un-skimmed YB head?
26-04-2006, 04:52 PM
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@ SpadgeWe got one for SiB's car a while back and I measured it at 139.1mm i believe (although it may have been 139.2mm
)Not a lot of help i know
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26-04-2006, 06:23 PM
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Originally Posted by GARETH T
you havent got the rule out again have you spadge?
Cheers for the info Bill
26-04-2006, 06:24 PM
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Originally Posted by Patto
Not meaning to offend by jumping on spadges post 
but wot is the max that can be taken of an esrt head..?
but wot is the max that can be taken of an esrt head..?
26-04-2006, 06:28 PM
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lol i see its a stupid question i take it its just im sure i was told you can only skim the head once due to compression, just wondered if thats true, but now you mention it i suppose it depends on wot was taken off before
its just im sure i was told you can only skim the head once due to compression, just wondered if thats true, but now you mention it i suppose it depends on wot was taken off before
26-04-2006, 07:02 PM
#12
Originally Posted by Billabong
Minimum head height AFTER machining is 138.68mm (between mating faces)
Maximum material removal is 0.13mm
From workshop manual.
Maximum material removal is 0.13mm
From workshop manual.
26-04-2006, 07:08 PM
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Yes, but the squish area (in the combustion bowl area in the head) is important, as is the meat left around the valve seats as a result of 'losing' part of the squish area.... there's a fairly detailed thread somewhere re: this, I'll see if I can find it.
Found: https://passionford.com/forum/viewtopic.php?t=105670 (Gold members only)
Patto, taken from Haynes, so I'd double check with a tuner if you can:
Escort 1.6 CVH
Max distorion over entire head: 0.15mm
Minimum combustion chamber depth after skimming: 19.60mm
STD compression ratio: 8.3:1
Spadgeroo, RichM mentions 139.2 (when new) on the Tech Essay thread... above.
Found: https://passionford.com/forum/viewtopic.php?t=105670 (Gold members only)
Patto, taken from Haynes, so I'd double check with a tuner if you can:
Escort 1.6 CVH
Max distorion over entire head: 0.15mm
Minimum combustion chamber depth after skimming: 19.60mm
STD compression ratio: 8.3:1
Spadgeroo, RichM mentions 139.2 (when new) on the Tech Essay thread... above.
26-04-2006, 07:41 PM
#15
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Originally Posted by SPADGE
Originally Posted by GARETH T
you havent got the rule out again have you spadge?
Cheers for the info Bill
26-04-2006, 08:05 PM
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Originally Posted by GARETH T
Originally Posted by SPADGE
Originally Posted by GARETH T
you havent got the rule out again have you spadge?
Cheers for the info Bill
I now measure the head with a piece of string and then measure the string against a rule
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