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rx dealer · 07-28-2009, 03:19 PM

It depend on what class you're running. Since I use the "441" casting SBC head i'm limited on how big my valve spring pocket can be cut for the 1.64 spring without hitting a water jacket, so I use the 1.55 spring and yes you get only 10-15 runs out of a set, and it could go either way depend on how high you rev your motor. Luke

07-28-2009, 03:19 PM	#3
rx dealer Member Join Date: Mar 2007 Location: Lake Orion, Michigan Posts: 337 Likes: 12 Liked 53 Times in 13 Posts	Re: Valve spring life It depend on what class you're running. Since I use the "441" casting SBC head i'm limited on how big my valve spring pocket can be cut for the 1.64 spring without hitting a water jacket, so I use the 1.55 spring and yes you get only 10-15 runs out of a set, and it could go either way depend on how high you rev your motor. Luke