lets see, ran an old beat 3ac at full throttle from Austin TX, to El Paso at full throttle one hot july day (104 deg at night), almost 4000 ft of elevation gain in 500 miles. Eight hours, only stopped once for gas in Ft. Stockton. quite a climb, but the engine never overheated. I did not damage any gaskets either. full throttle on the engine was only 84 mph, and that was just barley over the speed limit, where you will get passed by just about everyone else on the road. on the steeper climbs the speed dropped to 64 mph, and was really getting passed, even by the big rig trucks.irowiki wrote:How long of an uphill run are we talking?
If everything is working properly these engines will take the abuse. I have seen exhaust manifolds just start to glow a dull red, about 1200 deg F. it will take the heat, the high temp Permatex will not, that was my point. Nothing but a metal gasket will take that, not even the head gasket runs that hot ever.