Twin Zenith or Solex carbs

[Bob Culver]

Without an oxygen sensor, to get settings optimised for performance and economy can be protracted, although simplified with a low power car. Whilst carbs can often be transferred between similar engines with little alteration, twin carb settings for a 4 are markedly more weak than for same carb used singley. With a balance pipe single carb venturi usually too large. I presume jets and any air bleed tubes are cheaply available.
With twin carbs air leak problems are increased and slow running often challenging. Tuning difficulty increases at least as the square of no of carbs!
If anyone has ever played with twin 26VA may be helpful.
Many cars have thick fibre gskets to reduce heat, but will bonnet clear?