Update: when I changed from 10/30 to 20/50 my cold pressure went from 80 to 85lb. Not much, but, when HOT, it went from 25-30 idle, to 45. And it went from 60 hot on the freeway to 75. So that answers that. As several on here pointed out, thicker oil, DID NOT IMPROVE THE OIL CONSUMPTION!
I paid a lot of good money for a "professional. brand name" engine builder to screw it together. He wanted me to switch to 20/50 and so I tried it. Now I will do what I should have done, I will teart the #$&& engine out of the car and build it myself. I have NEVER, in dozens of engines, including BLOWN HEMI'S had an oil problem. I drove 70 miles to a car show today and used TWO QUARTS of oil!
So, here is the plan, the bushed lifter bores are getting drilled! the "expert" refused to do it. 200 lb cranking pressure is too much!
there goes the wimpy 248/254 @ 050 solid roller cam! I am thinking that the Mopar aluminum heads have to go. 540 ci. needs the new Eddy or Indy 420 cfm heads with decent valve guides and seals. What about gapless rings which the "expert" refused to use? We have a 4.375 bore, 4.500 stroke, Stage V intake, two 750 cfm Hollys to work with. Car weighs 4,175 lb., 727 w/ 3.54 gear Dana and is used for street driving. What suggestions do you have for the new build?