Manifold may be hot to the touch but is not operating hot, Manifolds that are aluminum and or galvinized normally have heat dissapating hoses attached.Gast 1023 models 3/4 HP with a 2-5 outlet manifold would need hoses 18-24 inches prior to poly or any type of sub melt point of 225F.205F is a common open flow exhaust temp for wob-l's and vanes from friction components. Keep in mind these are "oil less" pumps.The exhaust outlet on a model 1023 is .375 and expanding to a .5 inch manifold would help more to maintain a higher cfm availability than reducing the outlet heat.Its always going to "feel" too hot.
