LS7 Lifters
LS7 Lifters Did GM ever switch over to LS7 Lifters in LS1 motors, or are they just direct replacements for the LS1 lifters now? I have a stock '04 LS1 from a C5 and I'm trying to determine what lifters were stock.
Reason I am asking, is when Patrick G spe'c out my cam, he gave me a formula for calculating the theotretical push-rod length, and he used 7.380 for stock push rod length and added the 2x the difference in the base circle. I had always heard 7.400 was stock length, but I know LS7's require short rods due to the cup sitting up higher.. I know Pat seems to know his stuff, so I thought maybe my '04 motor cam with the LS7 Lifters, hence the shorter push rods? Thanks, Jason.
Reason I am asking, is when Patrick G spe'c out my cam, he gave me a formula for calculating the theotretical push-rod length, and he used 7.380 for stock push rod length and added the 2x the difference in the base circle. I had always heard 7.400 was stock length, but I know LS7's require short rods due to the cup sitting up higher.. I know Pat seems to know his stuff, so I thought maybe my '04 motor cam with the LS7 Lifters, hence the shorter push rods? Thanks, Jason.
Last edited by Racinjason424; Aug 9, 2010 at 08:27 PM.
Yep, the LS7's are now the only stock replacement. You cant even buy original LS1 lifters anymore, GM will sell you the LS7's instead. I have had mine in my combo for 3yrs & about 50k miles, never had a issue & I drive mine daily.
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