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+--- Thread: SU Carb on a chummy manifold (/showthread.php?tid=3757)
RE: SU Carb on a chummy manifold - Austin in the Shed - 06-11-2020
The inlet and carb faces were parallel.I used an 1 1/8" but don't know what it was originally fitted to.I did grind out the ports inside as much as possible before welding on the SU flange.
I remember the updraught manifold is quite a small bore especially the vertical bit.That's why I wouldn't go the 90 degree adapter way.
The box saloon was good for a genuine 60 on the flat,throttle tempered by the original 1 5/16" crank.
Just remembered I'd found an incomplete pair of early sprite/midget twin carbs which the adapter was cut from.
RE: SU Carb on a chummy manifold - Mark McKibbin - 18-11-2020
(06-11-2020, 08:57 AM)Austin in the Shed Wrote: The inlet and carb faces were parallel.I used an 1 1/8" but don't know what it was originally fitted to.I did grind out the ports inside as much as possible before welding on the SU flange.Dave,
I remember the updraught manifold is quite a small bore especially the vertical bit.That's why I wouldn't go the 90 degree adapter way.
The box saloon was good for a genuine 60 on the flat,throttle tempered by the original 1 5/16" crank.
Just remembered I'd found an incomplete pair of early sprite/midget twin carbs which the adapter was cut from.
Maybe you should cast some up, I'm sure there would be a market for those that want a gravity fed SU.