LS7 valve spring question
Thread Starter
Instructor
Joined: Jul 2022
Posts: 110
Likes: 16
LS7 valve spring question
So I have a typical H/C/I C6Z making 570 wheel hp, I did the Head and cam swap 10 years ago now but have only put 7-8k miles on it in that time. The cam has decently high lift in the .660 range. The valve springs are PAC 1207’s with titanium retainers. My question is should I be swapping these springs out with new ones based on the years of being installed or mileage? I planned on swapping them out at 20k miles when I did the original install but I just haven’t driven it as much as I thought. The other factor I just thought of is I have Johnson reduced travel lifters in as well so I’m not sure if those cause more wear on the springs. Anyways I’m curious on your guys thoughts about this.
Race Director
Joined: Oct 2004
Posts: 12,864
Likes: 4,668
So I have a typical H/C/I C6Z making 570 wheel hp, I did the Head and cam swap 10 years ago now but have only put 7-8k miles on it in that time. The cam has decently high lift in the .660 range. The valve springs are PAC 1207’s with titanium retainers. My question is should I be swapping these springs out with new ones based on the years of being installed or mileage? I planned on swapping them out at 20k miles when I did the original install but I just haven’t driven it as much as I thought. The other factor I just thought of is I have Johnson reduced travel lifters in as well so I’m not sure if those cause more wear on the springs. Anyways I’m curious on your guys thoughts about this.
Safety Car
Joined: May 2016
Posts: 4,669
Likes: 1,849
From: Erlanger, Kentucky
Mileage.
And I don't see that the short travel lifters would in any way put more stress on the springs.
Also, titanium retainers will wear so you should inspect those and likely replace them at the same time as the springs.
And I don't see that the short travel lifters would in any way put more stress on the springs.
Also, titanium retainers will wear so you should inspect those and likely replace them at the same time as the springs.
