For the last 20,000 miles or so I had been running ER / Split ratio rockers from zzp. They are supposed to be 1.8 on the exhaust and 1.85 on the intake. Thats all fine and dandy and they worked fine and made a noticeable difference when I was N/A and chasing GTPs around. Well after I went to a ssm90 setup and beyond I started noticing valve float up top because I was running alot of boost and alot of rpms on 170k old springs. So during the black friday sale at W-Bodystore I bought 105lb springs and the other rif raf needed modded retainers and whatnot. I also decided to bump up to 1.9 rockers while I was in there. When I was looking at the new vs old rockers the old er rockers looked like half of them were barely touched past the stock 1.6 and the other half couldn't have been more then a 1.7. The pushrod seat wasent even touching the very inner edge of the rocker. The 1.9s are touching and slightly encroaching on that inner edge.
I lost almost 3 psi on boost putting the 1.9s.... Thats awesome and it pulls like crazy but is it really possible that the rockers were that far off? I can post pics of the er rockers if anyone's curious.
