What size valve springs
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What size valve springs I have a 2002 LM7 5.3 with all supporting mods I'm installing a TSP stage 2 cam in. Specs are 212/218, .550/.550, 112. I was wondering what would be the appropriate sized beehive valve spring to avoid high RPM valve float while also avoiding HP loss through stiff valve train. Would it be better to get a set of .550 springs or some .560 springs?
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Being a drop-in, the 1218 uses your stock retainers and keepers.
However, you could just use a set of factory LS3 valve springs being at .550 lift, provided that you are using factory rockers. TSP's description of that cam even says that it is designed to use factory LS6/LS3 valve springs.
However, you could just use a set of factory LS3 valve springs being at .550 lift, provided that you are using factory rockers. TSP's description of that cam even says that it is designed to use factory LS6/LS3 valve springs.
Last edited by MuhThugga; Sep 2, 2022 at 05:18 AM.
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^^^This guy *****. You spend a third of the cost to get an OEM spring that was designed for the average consumer. I wouldn't think twice about buying them over any other valve spring in this scenario.
https://www.summitracing.com/parts/nal-12499224
These are them, they say .570 lift on here.
These are them, they say .570 lift on here.
^^^This guy *****. You spend a third of the cost to get an OEM spring that was designed for the average consumer. I wouldn't think twice about buying them over any other valve spring in this scenario.
https://www.summitracing.com/parts/nal-12499224
These are them, they say .570 lift on here.
https://www.summitracing.com/parts/nal-12499224
These are them, they say .570 lift on here.
Been in the LS game since 1999, PAC has always had an outstanding reputation. Folks literally jumped for joy when PAC started offering springs tailored for LS applications back in the day.
Saw enough brand new stock LS1's have valve float at the end of the dyno runs back in the day to always spend a little more for high quality valve spring like PAC.
YMMV
Saw enough brand new stock LS1's have valve float at the end of the dyno runs back in the day to always spend a little more for high quality valve spring like PAC.
YMMV
Been in the LS game since 1999, PAC has always had an outstanding reputation. Folks literally jumped for joy when PAC started offering springs tailored for LS applications back in the day.
Saw enough brand new stock LS1's have valve float at the end of the dyno runs back in the day to always spend a little more for high quality valve spring like PAC.
YMMV
Saw enough brand new stock LS1's have valve float at the end of the dyno runs back in the day to always spend a little more for high quality valve spring like PAC.
YMMV
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This is why I run a .630 spring with my .629 lift. It doesn't make much sense to run a .660 spring because I am just unnecessarily further from coil bicoi
The lift rating is not the same as coil bind. Running a spring to it's max lift rating isn't a bad thing, because that means the spring is being used to about .050" from coil bind. While a beehive is much less susceptible to harmonics, running traditional springs further from coil bind can result in bad harmonics and valve control, and lost power as a result. Just like too much spring will lose power.
This is why I run a .630 spring with my .629 lift. It doesn't make much sense to run a .660 spring because I am just unnecessarily further from coil bicoi
This is why I run a .630 spring with my .629 lift. It doesn't make much sense to run a .660 spring because I am just unnecessarily further from coil bicoi
