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Max

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You had ER rockers on your GT right? if so, did you change your springs or anything else or are ER's good by themselves?
 

Fish

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Some have no issues with rockers. Some need to switch the exhaust side since the 1.85s are on the exhaust side.(ER rockers are 1.8 on the intake and 1.85 on the exhaust). Some just change both. I floated around 6000 and above so I switched to 90 lbs springs.

Id go with 105s if I had to do it again.
 

DanJoy

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How do you know when you have valve float?
 
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Max

Max

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car feels like it falls flat on its face

I test drove a 2007 GP se or whatever the base model is and it did it at WOT before the first shift....
 
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Max

Max

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So why would you use 105's over 90's?
 

DanJoy

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From ZZP's site:
90# springs are GM LS6 yellow springs*. The LS6 comes from the factory with .550" of lift and spins to 6500 RPM to give an idea of what the springs were made for. Seat pressure is lower than the Comp Cams springs but spring rate is higher so they do work well for aggressive ramp rates. There springs work well with the VS, NIC, or XP cam. Because of the higher spring rate, timing chain dampener life is lower than with the 105's.

That's all i can really think of, that's why i'm probably going with the 105's over the LS6 springs.
 
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Max

Max

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ah, gotcha.

So i could just use my stock stuff and see if it works....but i could end up having to take the whole thing apart again to do springs...hmm....
 

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