Quote Originally Posted by SBC DATSUN
SBC 350 even before i added the weiand supercharger my car overheats not standing still but the faster i drive shouldnt it overheat standing still? You would think but it doesnt .

I have a datsun 280z with this 350 sbc im running no hood and its only 68 degrees outside . Ive made sure the thermostat works and it does what its supposed to do . The entire setup is only 8 weeks old from jegs crate engine and all .

I cant run a clutch fan as there isnt enough room so i have a electric fan the pulls through the radiator at about 3,300 cfm with a shroud that covers the entire radiator . Hold a piece of paper in front of the radiator about 14 inches away and it will suck it into the radiator so it seems to pull air decent .

Nothing is in front of the radiator seperate trans cooler in a different place no place near the radiator . Cools fine in traffic sitting still but get going and it hits 200 then 210 and thats with a 190 degree stat . I tried a 160 degree stat and same thing 200-210.

7 inch water pump pulley and 6 inch crank pulley milodon high flow pump tried all kinds of coolant additives still nothing
sounds like the water pump belt is slipping the more rpm's you turn. if you an turn it with your hand its to loose.