Unplugging these make no difference when hot,but then they shouldn't as they are supposed to come into play when the engine is cold.
The power loss when hot, it occurs to me, might be engine bay heat getting the induction manifold too hot, thus heating up the intake air too much. This would result in poor cylinder filling due to the expanded air. What does anybody think? We have wrapped the exhaust manifold. Has anybody any experience of fitting a fan to cool the intake manifold? Water temp. does not go mad and the rad.fan kicks in fine.
Have solved one problem whilst playing in the engine bay with the motor running: we had an occasional misfire on some runs, a lumpy idle and a flat spot coming off idle. I noticed arcing from the HT leads to the metal splash guard round the dizzie. Plug leads are relatively new so not suspect. I cured it by cutting the bottom off a 1 litre plastic Vimto bottle (regular not reduced sugar of course!), cutting a 3 inch ring from this and jamming it between the dizzie body and the offending metal bit, thus insulating it. This also appears to have cured poor hot starting which may have been due to losing sparks.
