What valve springs you running?

[AStangThang]

Whats up everyone. I went by Randys (my machinest) yesterday to drop off the valve springs for my heads. I wanted to do a quick little test on both the PAC springs and the factory springs. This is my findings:
PAC stage 2 .600" (New)
- seat pressure 95 @ 1.680
- open pressure 260 @ 1.080
Factory PI springs (30K miles)
- seat pressure 58 @ 1.680
- open pressure 160 @ 1.080

 

[96blak54]

Stick with stock, i did

 

[AStangThang]

Stick with stock, i did

Do you any valve float?

 

[SnakeBit!]

for stock cams or performance cams?

 

[96blak54]

Ive got comp 274 cams, engines pulls great to 6500, and stock springs. If the engine was a push rod, i could see why to get new springs. If the engine were to be forced induced, i can understand the upgrade. The pi head and its heavy valves were designed to float. In fact, their is no possible way the valves wouldnt float. Dig into it alittle more and youll draw the same conclusion

 

[AStangThang]

Ive got comp 274 cams, engines pulls great to 6500, and stock springs. If the engine was a push rod, i could see why to get new springs. If the engine were to be forced induced, i can understand the upgrade. The pi head and its heavy valves were designed to float. In fact, their is no possible way the valves wouldnt float. Dig into it alittle more and youll draw the same conclusion

Good info. It's a .555 lift, and boost.

 

[AStangThang]

for stock cams or performance cams?

Just in general. I was just putting some info out there.

 

[AStangThang]

A

Ive got comp 274 cams, engines pulls great to 6500, and stock springs. If the engine was a push rod, i could see why to get new springs. If the engine were to be forced induced, i can understand the upgrade. The pi head and its heavy valves were designed to float. In fact, their is no possible way the valves wouldnt float. Dig into it alittle more and youll draw the same conclusion

Are you running a eddy intake? Do you ever go to Blankenship tuning by a chance? My estimation and Jordan's at MHS is that my combo should keep pulling up to 6,400-6,500, so shift will be a little higher.