01-03-2018, 05:40 PM
(This post was last modified: 01-03-2018, 05:41 PM by Zetomagneto.)
(01-03-2018, 02:22 PM)Ally Monce Wrote: Hello ,with regards to your pistons for sale I have an Austin 8 AP Tourer 1939 with hepolite pistons 7665 +060 size = 2.295/58.269mm .Do you know if the are interchangeable as I beleive that the big 7 engine was used in the prewar 8 thank you regards Ally
Hi Ally, the pistons I have are for the 747cc Austin Seven, so not what you want.
Rgds
(01-03-2018, 04:29 PM)Jeff Taylor Wrote: My 1950's Hepolite catalogue confirms that the Austin Big Seven 900cc 1937 to 1939 and the New Eight 1939 onwards used the same engine and therefore the same Hepolite RS7665 pistons. However Big Seven pistons differ from those in the earlier model Austin Sevens 747cc 1923 to 1939 which are Hepolite RS11063.
The differences are as follows:
Austin Big Seven & New Eight: Bore: 2.235", Compression Height: 1.25", Length: 2.5"
Austin Seven: Bore: 2.20", Compression Height: 7/8", Length: 1.13/16"
Zeto will need to confirm if his are the earlier 747cc pistons (which I think they probably are) or Big Seven pistons.
Thanks Jeff