Is there such a thing as overkill on valvesprings? I have 918's on my setup but I was just wondering if you had an extremely mild cam and put some bad *** springs that take around .650+ lift, would it actually harm performance if such a stiff spring was used?

 

As far as hurting performance, there's arguements to both sides of whether it does or not. But for reliability and longevity, it most certainly does hurt that.

 

I had heard the same but wasnt to sure on this....ttt

 

I honestly don't think theirs a spring around that will fit into 1.300" spring pocket that will be overkill

 

I agree with that.

 

Anybody care to give an explanation as to why a bigger spring doesn't rob power because of the extra force required to compress it?

Someone told me it makes no difference, but I'm not sure I understand how that could be.

 

To much spring pressure and hi rpms can collapse a lifter. There is such a thing as overkill, but what was stated was that with such a small spring it might not be likely in this case.

I like to match the spring to the application, and the lifters are part of the equation.

 

You need to watch your open pressure at your cams lift. A spring you think is good for650 may have low pressure at 525 causing trouble.

Kurt

 

It doesn't rob power. For the springs compressing you have springs decompressing to offset it. I wish i could explain it better but it has been awhile since I read the tech article explaining in detail. I would go PAC beehive instead of doubles to keep VT weight down if you are not running aggressive lobes/high lift. After saying this yes I am running doubles good to .650 lift

 

So with a mild cam like mine, it would probably be detrimental because of weight in the valvetrain...

 

Not sure how detrimental or power robbing it is but lighter weight is better than heavier when it comes to valve train.