[undy]

Rick,

Are you running the pump bypass or is it hooked up? I might have missed it in your responses.. IMO, I need to drill enough holes to give me the approximate volume that the bypass line had. I would assume that's a Ford designed predetermined flow that's required. No way one or two 1/8" to 1/4" hole will give you that. It looks like Gessford had already figured that out. Given the ID of the bypass hose I would think, as in Patrick's post, that 4ea 1/4" holes would approximate the volume of the bypass hose. I can calculate it closer mathematically too. Overheating isn't a problem. My pulleys are of the right diameters. The only problem is the intitial temperature spike before the t-stat starts to modulate.
dave