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Longman Head Id
Started by
Zami
, Sep 29 2019 09:30 PM
3 replies to this topic
#1
Zami
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- TMF+ Member
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- 169 posts
Mini Mad
- Location: Southport, NC
Posted 29 September 2019 - 09:30 PM
i have a big valve 12G940 longman head with some numbers stamped into it one of which i can’t recall it means. it has chamber size 21.0 and a 4 digit number i believe is a s/n and a third number “30” which i am trying to decipher. anyone know the code?
#2
GraemeC
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Crazy About Mini's
- Location: Carnforth
Posted 30 September 2019 - 04:40 AM
Probably denotes it’s had a 0.030” (30 thou) skim.
You could confirm by measuring the thickness, I think standard is exactly 2.75”.
You could confirm by measuring the thickness, I think standard is exactly 2.75”.
#3
Zami
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Mini Mad
- Location: Southport, NC
Posted 30 September 2019 - 04:51 PM
i’ll check this next time i remove the head. thks
#4
imack
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Up Into Fourth
- Location: Orpington, Kent
Posted 30 September 2019 - 05:02 PM
My old cracked Longman GT15 would appear to have had 80thou skimmed from it.
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