ls6 springs wtf!
#1
ls6 springs wtf!
OK we all know about the famous ls6 valve springs. So I'm gonna install a xr265 cam in a 5.3 so I bought a set and they work great. This is my problem. Some websites claim they are good to .570 even some .580 lift. THATS TOTAL BULLSHIT! Ifirst I installed them on a pair of 863's then a set of 243's. Both application coil bind at .580. You need a minimum of .40 cushion from coil bind especially with a hydraulic lifter. So anyone the tries them on .540 or more is asking for failure. Not to mention 80psi on the seat is asking for valve float. I wanna see 120 on the seat.
#2
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We just put one on the spring checker and from 1.800" installed height at .570" lift there was still .035" left in the spring. You might check your installed height measurements. For any cams mild enough to run an LS6 spring, that's more than safe. We also saw 92# closed pressure and just over 300# open.
No, they aren't for crazy applications with aggressive lobes or boosted applications with aftermarket cams. For the right mild cams they are a great option though. The only time they would be a problem is when they are improperly spec'd for a cam or build too aggressive for their specs.
No, they aren't for crazy applications with aggressive lobes or boosted applications with aftermarket cams. For the right mild cams they are a great option though. The only time they would be a problem is when they are improperly spec'd for a cam or build too aggressive for their specs.
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As far as available kits from GM there are only blue springs now, which is what i checked. Yellow are long gone. LS9 and LS3 both come with the blue spring.
None are recommended to .585"
None are recommended to .585"
#5
Formerly ScreamingL
when i bought my blue springs 2 yrs ago from summit for my thumper cam it was labeled 585
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Rest assured, we have measured several times and no blue spring has ever been good to .585" when assuming a 1.800 installed height.
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