Thanks bob

It does have a shroud its a chrome shroud but not one of the chessy chrome ones so it does go about 3/4 of the way around the fan,its a decent width shroud also so even at 5" away the fan blades are covered about halfway by the shroud.

Spacing it to within 1" will deffinetly put the entire fan in the shroud though so maybe this could be the culprit.

Also the radiator is a brand new aluminum rad with 2 1" rows in it.


BG