Oil pump question (Pontiac)

Knocky · 07-18-2011, 07:27 AM

My 73 SD 455 came with 80psi pump spring. We put in the 60 for street/strip use. But, I figure the factory knew what they were doing when they went to the trouble of the 80 with the special larger distributor gear to prevent premature wear of the gear. The Super Duty used that high pressure pump overcome the centrifugal forces of the long throw crank at 6000+ when the SD's anticipated use was Stk/Super Stock racing is what I understood... Butler or Nunzi should know!
Good luck with that Pontiac! Norris

07-18-2011, 07:27 AM	#4
Knocky Junior Member Join Date: Sep 2010 Posts: 32 Likes: 0 Liked 0 Times in 0 Posts	Re: Oil pump question (Pontiac) My 73 SD 455 came with 80psi pump spring. We put in the 60 for street/strip use. But, I figure the factory knew what they were doing when they went to the trouble of the 80 with the special larger distributor gear to prevent premature wear of the gear. The Super Duty used that high pressure pump overcome the centrifugal forces of the long throw crank at 6000+ when the SD's anticipated use was Stk/Super Stock racing is what I understood... Butler or Nunzi should know! Good luck with that Pontiac! Norris