I am running stock Explorer Gt40 heads. I will be using Scorpion 1.72 Pedestal mount roller rockers with a used custom cam.
Cam specs with 1.72 RR
intake and exhaust lift .552
Duration @ .006 276 Int 270 Exh
Duration @ .050 224 Int 218 Exh
Preferred spring pressure is 130 - 135 on the seat.
I have found a set of beehive springs: TFS 15405
Number of Springs Per Valve: Single
Outside Diameter of Outer Spring (in): 1.450 in.
Coil Bind Height (in): 1.316 in.
Damper Spring Included: No
Spring Rate (lbs/in): 455 lbs./in.
Inside Diameter of Outer Spring (in): 0.860 in.
Valve Spring Style: Beehive
Valve Springs, Pacaloy, Single, 1.450 in. Outside Diameter, 1.940 in. Installed Height.
I would need to shim them to get an installed height of 1.900 with a seat pressure of 138lbs. With .552 lift that only leaves me with .03188" clearance before coil bind.
What else is available without pulling the heads and machining the spring pocket?
Thanks,
Rob
Cam specs with 1.72 RR
intake and exhaust lift .552
Duration @ .006 276 Int 270 Exh
Duration @ .050 224 Int 218 Exh
Preferred spring pressure is 130 - 135 on the seat.
I have found a set of beehive springs: TFS 15405
Number of Springs Per Valve: Single
Outside Diameter of Outer Spring (in): 1.450 in.
Coil Bind Height (in): 1.316 in.
Damper Spring Included: No
Spring Rate (lbs/in): 455 lbs./in.
Inside Diameter of Outer Spring (in): 0.860 in.
Valve Spring Style: Beehive
Valve Springs, Pacaloy, Single, 1.450 in. Outside Diameter, 1.940 in. Installed Height.
I would need to shim them to get an installed height of 1.900 with a seat pressure of 138lbs. With .552 lift that only leaves me with .03188" clearance before coil bind.
What else is available without pulling the heads and machining the spring pocket?
Thanks,
Rob