Re: Re: Where exactly does the petrol go?

[Anonymous]

I too have been suffering from the “missing petrol” when the car is left for a while. sure a few pumps on the priming lever helps but it never fired straight away.
Non return valve fitted but not really made a difference.
Always felt the car was choked by the single carb, by the way the revs would drop at a fold in the map let alone a hill, just look at the carb dia for a 2 litre engine.
I have now fitted the twin SU carb and manifold available from the pages of Floating Power and the transformation is amazing. I have always been a fan of SU carbs as they are so easy to set up and tune.
Not only instant starting, no matter how long the car is left it fires straight away. The car now leaps up hills with no loss of speed.
I can only conclude the lack of petrol is due to the fuel bowl on the single carb sitting on top of the hot spot and heat soak is evaporating the fuel away.