Originally posted by southerner


I may mention that Mr Vizard was supporting the idea of these partially filled blocks for street use. The block filler acted as an insulator between the crankcase and the water jacket thus getting different temperatures for the water and the oil,
Hmm, I generally run the water temp at 180° and the oil temp at 220°. I would never run a filled block on the street unless someone could prove to me they had a material that would “move” exactly the same as the block and that wouldn’t eventually plug my radiator.