TransAmcoupe98

iTrader: (10)

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?

KCS

iTrader: (20)

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.

SSkillz

iTrader: (22)

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

Tom@SpeedInc

iTrader: (5)

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

JPH

iTrader: (2)

I agree with that.

PBMFIsMe

iTrader: (5)

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.

99blancoSS

iTrader: (115)

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.

427

iTrader: (3)

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

SOMbitch

iTrader: (8)

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

TransAmcoupe98

iTrader: (10)

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

99blancoSS

iTrader: (115)

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