28-11-2020, 08:16 PM
I have recently fitted a SU 1 1/4” carb which came with a
BP needle fitted it gives a marked improvement to performance and starting.
I have also fitted a manual override to the distributor, this is a great help to find optimum timing setting.
All appears well except No. 3 plug always is very rich in appearance the other three look reasonably ok. The photo does not show how sooty No. 3 is compared to the others.
Does anyone have possible reasons that may cause this? I have skimmed the block face and manifold to avoid leaks, the carb has a new home made adapter all faces are flat.
All the plugs are the same Champion D16 with 0.020” gap.
Roger
BP needle fitted it gives a marked improvement to performance and starting.
I have also fitted a manual override to the distributor, this is a great help to find optimum timing setting.
All appears well except No. 3 plug always is very rich in appearance the other three look reasonably ok. The photo does not show how sooty No. 3 is compared to the others.
Does anyone have possible reasons that may cause this? I have skimmed the block face and manifold to avoid leaks, the carb has a new home made adapter all faces are flat.
All the plugs are the same Champion D16 with 0.020” gap.
Roger
Location:- Haverfordwest, Pembrokeshire.