75 HP Bristol engine.

[geo]

Originally Posted by BillWatkins

In my experience, it is important to assure that there is not an air leak
around the butterfly shafts
of the Solex carburetors.

Bill Watkins

I should agree with Bill here and it is something that is so frequently overlooked: on the very-similar carb. fitted to the old two-stroke SAABs (and other old Solexes with which I have dealt) this really can be a problem that upsets the most rigorous tuning attempts, particularly when it comes to balancing multiple carbs.

If it is possible to fit new seals round the spindle (probably did not have one originally, but a suitable one might be found in the SU range if none available for the Solex) and possibly a new spindle (if worn where it makes contact with the body of the carb.), then perfection of balancing will result.

I did not envy a chum who was not getting anywhere fast attempting to balance the eight pots on a relatively modern Lagonda the other day!

George

[Nick Wood]

Hi, while searching for something else, I found this forum discussing the original engine 1065 from my 400/530.

Geoff wondered what was on the ID plate.
I dug the plate out of the burnt out remains and it has the engine number as 400-85-1065 stamped on it.

This may clarify, or further confuse the issue.
Nick