This is wrong, they have no problems why? Well I will tell you. Because their cars are fairly new and they wouldn't know if their cars had valvetrain strain.bartlomiej said:there are a TON of people on FJ running crower 2's with stock valvetrain and have had NO PROBLEMS past 20k miles. it is a good idea to upgrade, but not necessary.
I had and have installed a ton of crower stage 2's.bartlomiej said:interesting... i have a buddy with a turbo (pushing 220+) and he has been running crower 2's for some time now and no problems. a mutlitude of people have been running crower 2's for 20k+ and have had no problems. this is the first i've heard of crower 2's weakening the valvetrain. I have NEVER heard of crower 2's doing any kind of damage when installed properly.
i think it's all relative. obviously cams will put stress on the valvetrain weakening it (as with anything else), but not to the point where it wont last 20k miles!!!!!focaltech said:I had and have installed a ton of crower stage 2's.
Just because folks have the cams doesn't mean its not weakening their valvetrain.
The stock valvetrain is ok but not designed to last under the kind of conditions the cams stress. That is why crower and other manufacturers recommend upgraded valvetrain components.
Your missing the point, no one said at 20k miles your valvetrain craps out, why do you keep saying that? Its not part of the argument.bartlomiej said:i think it's all relative. obviously cams will put stress on the valvetrain weakening it (as with anything else), but not to the point where it wont last 20k miles!!!!!
the main reason cam manufactures put that disclaimer on all cams is to cover their asses. the point i want to make is that even though it weakens the valves, it'll take alot more than just mild bolt ons and crower 2's to ruin them. 100's of crower 2 owners with 20k+ miles can't be wrong.