Quote:
Originally Posted by 64speed
Almost 80 at cruise
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So that's really good oil pressure. You could probably run a max weight of 40. You could try another oil say 10w-40. I like the Amsoil brand. I run there 10w-40 in my car with solid lifters on a hydraulic cam.
https://www.amsoil.ca/p/premium-prot...motor-oil-amo/
I run the Z-rod oil 20w-50 in the IA2 as the bearing clearance is looser.
https://www.amsoil.ca/p/z-rod-20w-50...motor-oil-zrf/
At the end of the day it just comes down to preference on oil and brand.
As mentioned it just may be the nature of the brand lifters you are using as other have mentioned. I would call the manufacture and ask them for recommendations on their lifters.
You said your running Lucas 20w-50 for break in. Maybe put your ZR1 oil in and try it. I can't find ZR1. Must be VR1. Your break in must be done by now. In other words, rings must be seated by now.
You should also talk to your builder see what they say about running a litter weight oil.
I was told by Johnson lifters rep to not run any weight oil over 40 as the lifter would not perform properly.
I use to use this product from GM long time ago when I ran flat tappet. It performed really well on lifters and cam. Not sure you can get it anymore.
https://parts.lakewoodchev.com/produ...SABEgK1BPD_BwE