20-05-2018, 08:09 AM
Hi Dave,
Tuned up Mini's with SU's had the same problems. The fuel, as you rightly say, is boiling - in the float chamber - making the mixture too rich. You need a heat shield between the exhaust and the float chamber, a simple aluminium shield did the trick on my AH. Plus have an insulating gasket between the manifold and carb. Getting plenty of air round the carb is the last part, it comes in easily enough through the radiator but is there an easy way out with a flow in between? In these circumstances folding the side of the bonnet up can work.
Hope it works for you, Dave.
Tuned up Mini's with SU's had the same problems. The fuel, as you rightly say, is boiling - in the float chamber - making the mixture too rich. You need a heat shield between the exhaust and the float chamber, a simple aluminium shield did the trick on my AH. Plus have an insulating gasket between the manifold and carb. Getting plenty of air round the carb is the last part, it comes in easily enough through the radiator but is there an easy way out with a flow in between? In these circumstances folding the side of the bonnet up can work.
Hope it works for you, Dave.