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+--- Thread: Ruby Mk2 low compression plug (/showthread.php?tid=8173)
Ruby Mk2 low compression plug - k8207418 - 17-11-2022
My head is spinning looking back at old posts re spark plugs
What the usual plug fitted to a standard engine as above
RE: Ruby Mk2 low compression plug - David Cochrane - 17-11-2022
Champion D16 or D21, NGK AB6, etc.
RE: Ruby Mk2 low compression plug - Howard Wright - 18-11-2022
(17-11-2022, 10:04 PM)k8207418 Wrote: My head is spinning looking back at old posts re spark plugs
What the usual plug fitted to a standard engine as above
Hi
I thought Mk2 Rubys had high compression heads?
Cheers
Howard
RE: Ruby Mk2 low compression plug - Tiger - 18-11-2022
Howard
My Ruby has a LC head !
However not sure after 88 years she has the original head ?
PS while discussing plugs a little time ago I posted about the seal on the head.
Looking back I was a bit mixed up however I still have the same leaking plug seal and ask
again does the chamfer on D16 plug aggravate this sorry to labour the point !
RE: Ruby Mk2 low compression plug - k8207418 - 18-11-2022
I would be interested in the answer to this
Got some AB6
What gap do I need ?
Thanks
RE: Ruby Mk2 low compression plug - Tiger - 18-11-2022
I use 20 thou
RE: Ruby Mk2 low compression plug - John Mason - 19-11-2022
Not to be rude and correct me if I am wrong but if your Ruby is 88 yrs old would that not make it a Mk1 and thus having a low compression head fitted from new.
John Mason.
RE: Ruby Mk2 low compression plug - Tiger - 19-11-2022
Not rude at all John any views on sevens always welcome!
I have the original log book both engine and chassis numbers match with the book.
All the bodywork is as mk2
But still probably not the original head
Regards
Tim
Just realised my error it’s 86 years old !
RE: Ruby Mk2 low compression plug - k8207418 - 19-11-2022
Are you we saying Mk2 didn’t have low compression heads ?
RE: Ruby Mk2 low compression plug - Tony Press - 19-11-2022
There was briefly a middling compression head around 1935 but in 1936 the so-called 37 high compression (relatively) head was fitted to all Austin 7s.