Vave spring selection help please!
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From: Lake Tapps, WA
Vave spring selection help please! I know these questions have been asked over and over but the more I read the less I know. What spring shoud I use on a stock LS1 head with a .561 lift cam? I see springs for .600+ cams, should I buy one of those sets or is there springs that are better suited to the smaller cam?
Forget about lift capability, you should be looking at seat force, open force and surface treatments for extended life.
My top picks would be correctly set up PSI 1511ML's or PAC 1518. Both are excellent springs treated for extended life.
My top picks would be correctly set up PSI 1511ML's or PAC 1518. Both are excellent springs treated for extended life.
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The PAC 12/1518's are both beehives. The 1518's are nitrided (will last longer) and have slightly more seat pressure. The 18's are rated at .650 lift too IIRC but somebody will correct me fast if i am wrong
The Patriot/ PRC golds are duals and are not necessary in your application IMHO. They are just heavier and add valvetrain weight when the PACS will be all you need. In some apps duals can be perfect....
The Patriot/ PRC golds are duals and are not necessary in your application IMHO. They are just heavier and add valvetrain weight when the PACS will be all you need. In some apps duals can be perfect....
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So would these springs fit stock heads? And to take that further would the stock retainers be sufficient? Finally where can one acquire these super springs?
I have 1518's on a .609 lift
Straight from Pat G himself...
"PAC 1518s are a truly robust spring and I am not aware of any breakage issues with them. They are the best beehive available for these motors."
Straight from Pat G himself...
"PAC 1518s are a truly robust spring and I am not aware of any breakage issues with them. They are the best beehive available for these motors."
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From: Turnin' Wrenches Infractions: 005
^^^why use a .575 lift spring with a .561 cam?? i would feel more comfortable with a .600 or .625 beehive myself. thats just a little added reassurance to me.
I know these questions have been asked over and over but the more I read the less I know. What spring shoud I use on a stock LS1 head with a .561 lift cam? I see springs for .600+ cams, should I buy one of those sets or is there springs that are better suited to the smaller cam?
