Cam/valve spring question
Cam/valve spring question Do you guys see any problems with lifters collapsing with this cam combo? Or any other possible problems?
Comp 232/244 @.050 .648/.648 lift 113CL
LS7 lifters and Patriot Extreme springs with 2.2 Ti intake and 1.6 sodium filled exhaust valves.
Comp 232/244 @.050 .648/.648 lift 113CL
LS7 lifters and Patriot Extreme springs with 2.2 Ti intake and 1.6 sodium filled exhaust valves.
I did a very informal survey a couple of years ago using the search function for guys who had problems with lifters. What I found was if the lifter load was 625# or under then no one seemed to have problems with stock lifters. Once you went over this number it became a little more dicey and the higher you went the worse it got. This was one of the reasons I elected to go with the Morels, because they could handle more spring. You are at 680# (400 X 1.7).
I would check with guys running AFR heads with the 8019 spring option and these lifters since the over the nose forces will be about the same assuming around 0.600" lift. There are quite a few of these out there and may provide you with better information.
I would check with guys running AFR heads with the 8019 spring option and these lifters since the over the nose forces will be about the same assuming around 0.600" lift. There are quite a few of these out there and may provide you with better information.
I did a very informal survey a couple of years ago using the search function for guys who had problems with lifters. What I found was if the lifter load was 625# or under then no one seemed to have problems with stock lifters. Once you went over this number it became a little more dicey and the higher you went the worse it got. This was one of the reasons I elected to go with the Morels, because they could handle more spring. You are at 680# (400 X 1.7).
You dont still have the results do you? It would be good information to see.
I'm running 1.8 rockers so thats worse. I guess that would be 720. Not good so far. I was under the impression that a lot of people were running patriots with stock lifters.
With your lighter valves, you "may" be able to back off on the shims and spring loads, but 1.8's definitely will load the lifter more. Correct geometry (wipe pattern) will be critical as well for stability.
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