valve spring pressure

jamie2370 · 07-08-2019, 03:07 PM

350 sbc, flat tappet hydraulic cam(stocker motor) Thinking I have valve springs going causing car to not turn over 5500rpm. I used an on car spring tester. I got 110ish to just open valve and around 250ish at .500 lift(1/2" measurement), tested with that valve closed and I could spin pushrod with my fingers. Looking at Pac 1409x , it shows like 150/390. I'm thinking the springs are gone??

07-08-2019, 03:07 PM	#1
jamie2370 Member Join Date: Dec 2014 Location: Perry, GA Posts: 331 Likes: 11 Liked 239 Times in 90 Posts	valve spring pressure 350 sbc, flat tappet hydraulic cam(stocker motor) Thinking I have valve springs going causing car to not turn over 5500rpm. I used an on car spring tester. I got 110ish to just open valve and around 250ish at .500 lift(1/2" measurement), tested with that valve closed and I could spin pushrod with my fingers. Looking at Pac 1409x , it shows like 150/390. I'm thinking the springs are gone??

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