Please enlighten me
#1
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Please enlighten me
Can someone tell me the benefits of the following mods, how they work exaactly and whats involved in the install?
Mods in question: 1.9:1 HS roller rockers and 105# valve springs
Mods in question: 1.9:1 HS roller rockers and 105# valve springs
#2
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Stock rockers are 1.6:1 so installing 1.9:1 rockers will open the valves further and a little bit longer. This allows more air to move threw with less effort. Stock valve springs are 60#, so installing 90# or 105# springs allow the valves to close faster, this is needed when running at higher RPMs such as 6000 rpm shift points. With stock springs you risk valve float.
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ok makes sense. So what is involved in replacing those? I imagine the sc has to come off in order to get to the rocker housing yes?
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Rockers are one of the easiest things to change, springs are a bit more involved. Here'* a write up.
https://www.gmforum.com/t278815/
https://www.gmforum.com/t278815/