I am trying to use a late model case with Gtp rotors and snout in a carbureted application for my '56 ford pick up with a 312.
The Pontiac snout is longer than ours, and will help get the pulleys where I need them while centering the blower over the engine better. I purchased a custom made drive mandrel/hub for the SC shaft to use bolt on interchangeable pulleys, similar to the cobra/Shelby/lightning guys. The Pontiac snouts drive shaft is also bigger than ours, and setup for a press fit, not a keyed slip fit. The shaft diameter is .780" the steel pulley that came off it is .770" , or a .010" press fit. My mandrel/hub is aluminum, and I will need to open it up to the correct press for the Pontiac shaft. My big question is does the aluminum material change the amount of press needed? How much press should I aim for when machining/honing? I am thinking that the aluminum will need a tighter press (ie, a SMALLER hole in the hub), but .010" seems pretty tight already. Anybody got any experience with this can help me out?
Thanks
Adam
The Pontiac snout is longer than ours, and will help get the pulleys where I need them while centering the blower over the engine better. I purchased a custom made drive mandrel/hub for the SC shaft to use bolt on interchangeable pulleys, similar to the cobra/Shelby/lightning guys. The Pontiac snouts drive shaft is also bigger than ours, and setup for a press fit, not a keyed slip fit. The shaft diameter is .780" the steel pulley that came off it is .770" , or a .010" press fit. My mandrel/hub is aluminum, and I will need to open it up to the correct press for the Pontiac shaft. My big question is does the aluminum material change the amount of press needed? How much press should I aim for when machining/honing? I am thinking that the aluminum will need a tighter press (ie, a SMALLER hole in the hub), but .010" seems pretty tight already. Anybody got any experience with this can help me out?
Thanks
Adam