So, I bought a valve spring compression tester, and started going through my spring sets. I have a couple sets that come in at 45-50psi closed, 140/145psi open (with a couple weak outliers). I also have a third set at 70/170.
My fourth set is dual spring, with one piece retainer. The outer spring is 95/160, with the inner spring it's 120/230. That seems pretty high. They may have come with my CI head, i don't remember.
I'm assuming that with a large log, shaved but not ported, there's no reason to go above my 70/170 set, and that might even be overkill?
I also have a couple shim sets.
My fourth set is dual spring, with one piece retainer. The outer spring is 95/160, with the inner spring it's 120/230. That seems pretty high. They may have come with my CI head, i don't remember.
I'm assuming that with a large log, shaved but not ported, there's no reason to go above my 70/170 set, and that might even be overkill?
I also have a couple shim sets.