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Generation III Internal Engine 1997-2006 LS1 | LS6
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26915's and 26918's

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Old 01-28-2008, 12:05 PM
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Default 26915's and 26918's
Whats the difference? I was looking in comp book at wk and they say the same thing. max .600 lift, for ls1-ls6? Anyone got an idea?
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Old 01-28-2008, 12:59 PM
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915 = 105lb seat pressure, 290lb open press

918 = 130lb seat pressure, 320lb(?) open press

numbers may not be exact but they're close
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Old 01-29-2008, 10:51 PM
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so could the 26915's be used with a comp cam 232/234@50 .591/.598 112? Just wondering.
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Old 01-29-2008, 11:02 PM
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Originally Posted by sammyb
so could the 26915's be used with a comp cam 232/234@50 .591/.598 112? Just wondering.
the 105 290 seat pressure is pretty low. You might get valve float. If not the 918s check out the afr 8019 springs (155 412)
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Old 01-30-2008, 12:22 AM
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the new 918 are said to be good now there were the 928's, we have them on our car no problemsjust make sure there silver in color w no blue strips
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Old 01-30-2008, 10:21 AM
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Originally Posted by sammyb
so could the 26915's be used with a comp cam 232/234@50 .591/.598 112? Just wondering.
theoretically yes, but i wouldnt...915's are geared more toward smaller cams
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