That quite a bit of spring pressure. I have run them to about 350 lbs open with solid flat tappets. But your talking about 40% more pressure overall compared to a solid flat cam.
[color:"red"]65 Hemi Belvedere coming soon [/color] [color:"#00FF00"]557" Indy engine 1.07 60ft 144mph in the 8th 2100 lbs package [/color]
