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hognutz · 06-11-2013, 11:26 PM

I was still trying to figure out the exact part number of valve spring in the LSA.

if it uses the 12589774 spring like some sites say I would change it. some site's list it at max lift .570 and some .520. if it is .520 you could get coil bind and have a bad day.

these are two budget options or you could go with a dual. more spring pressure can lead to more wear though so I might just run one of these.

http://paceperformance.com/i-6255315...set-of-16.html

http://www.lingenfelter.com/mm5/merc...gory_Code=C159

I would proabably role the lingenfelter due to they are verified not to have coil bind.

short story long the LS9 runs 12psi and rev's 6500rpm so these spring should work in my case. I am 11.5-13.8 psi and 6500rpm redline right now.

I have been toying with the idea of just runing the LS9 cam and longtubes to break the 600whp barrier without runing a ton of boost and building a ton more heat to need major coolign mods.

06-11-2013, 11:26 PM	#3
hognutz Drives: 2013 ZL1 Join Date: Oct 2011 Location: tangent or Posts: 2,984	I was still trying to figure out the exact part number of valve spring in the LSA. if it uses the 12589774 spring like some sites say I would change it. some site's list it at max lift .570 and some .520. if it is .520 you could get coil bind and have a bad day. these are two budget options or you could go with a dual. more spring pressure can lead to more wear though so I might just run one of these. http://paceperformance.com/i-6255315...set-of-16.html http://www.lingenfelter.com/mm5/merc...gory_Code=C159 I would proabably role the lingenfelter due to they are verified not to have coil bind. short story long the LS9 runs 12psi and rev's 6500rpm so these spring should work in my case. I am 11.5-13.8 psi and 6500rpm redline right now. I have been toying with the idea of just runing the LS9 cam and longtubes to break the 600whp barrier without runing a ton of boost and building a ton more heat to need major coolign mods. __________________ shopping for 2017+1le or zl1 2009 CTS-V -sold 2015 Hellcat-sold 2013 ZL1 -sold 2007 Z06- sold 2014 Chrysler 300 2011 Duramax 8" lift, deleted tuned Last edited by hognutz; 06-12-2013 at 01:39 PM.