Inlet manifold & hot water's exit ( from cylinder head ) are in the same aluminium block, so inlet manifold cannot be cool : after engine warms up, intake air & fuel get too hot, i.e. cannot expand much when ignited, torque slowly drops as engine warms up. Hot water piped out from bottom of carburetor gets piped straight back into cylinder head, so cylinder head gets too hot. This hot water should be piped into radiator to be cooled 1st. Users with infra red thermo meter / camera can easily see, those w-o can use their fingers to feel, that this pipe is far hotter than the rubber hose with cooled water from radiator. Even in a cool ambient air of 27°C ( let alone in hotter weather ), non- believers can glue a few heatsinks onto this pipe, then [i] see ( per gauge ) how much slower the water ( leaving cylinder head ) temperature will rise, & to a lower maximum [ii] feel how much torque rises @ once. Air intake should be as cool as possible
- posted
18 years ago