As above can anybody give me the correct piston dish capacity of an O/E 850 piston, or if the O/E were flat top ( but I don't think they were) the only figure I can find is 6.5cc which seems a bit high.
Shooter
850 Piston Dish Capacity
Started by
Shooter63
, Feb 27 2024 10:49 PM
3 replies to this topic
#2
RichB
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Just On Tickover
- Location: Shropshire
Posted 27 February 2024 - 11:52 PM
I measured the dish diameter at 47mm and the depth at 1.5mm. Using a spherical section calculation the volume comes out at 1.3 cc. That's on a 1966 850.
#3
Shooter63
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One Carb Or Two?
- Location: Essex
Posted 28 February 2024 - 06:30 AM
I measured the dish diameter at 47mm and the depth at 1.5mm. Using a spherical section calculation the volume comes out at 1.3 cc. That's on a 1966 850.
Legend! Thanks for that, it sounds more realistic.
Shooter
#4
Spider
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Moved Into The Garage
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Posted 28 February 2024 - 05:55 PM
The factory lists the 12A120 Piston for the 850 dish at 0.87 cc
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