Valve spring choice
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From: >>>_FRISCO_MUSCLE_<<<
Valve spring choice With a small cam like mine (224/230 .581/.588), did you guys recommend shimming a .650 dual spring or just go with a set of .600 single? I don't want any valve float or drop valve happen. However, after read the thread about a cam journal being eaten by the lifter bcuz of too stiff valve spring, I've concern now.
I've both springs and the head are ready to assemble. I need to tell the shop what to do.
I've both springs and the head are ready to assemble. I need to tell the shop what to do.
The doubles would allow a touch of safety, but they also stress the retainers and keepers more along with the lifters and the cam. They also eat up valuable horsepower to turn the motor over with the heavier spring pressures. I have a similar cam and went with the beehives and I'm not worrying about them a bit. I'll probably enjoy at least 5hp more due to the lightened spring load too.
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From: >>>_FRISCO_MUSCLE_<<<
Read that thread again and the can lobe eaten by the lifter more likely caused by the valvetrain. I'm not running a high lift cam and won't go any bigger so I guess I'll go for single spring.
I'm not saying that there's one spring design that is best for all cam profiles, dual springs definitely have their place.
However, running major spring rate w/ stock lifters and aggressive lobe ramps seems to be a common theme in many of the "valvetrain noise" threads here...including mine.
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From: >>>_FRISCO_MUSCLE_<<<
Most the time I saw Beehives broke, they run with a higher lobe cam like 23x/23x and very close to .6xx lift. I'd like to see people with 224R, TR224 or a cam similar to mine what kinda spring they're running.
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A few years back I broke 10 of 16 behive (918) springs with a SMALL 216/222-116+3 cam. Comp has since upgraded those springs and I don't know that to be a problem any longer, but every since then
nothing less than duals on my stuff. Interesting enough, the stock ls6 springs never broke.
Using STOCK lifters and TFS215 heads (650 dual springs) and a 224/228-112+2, never had valve problems, at least that I knew of.
Note, the inner spring is more of a safety net. Better for a valve to fail in closed position vs drop in to the piston.
SOME DATA FOR YOU:
A few years back I broke 10 of 16 behive (918) springs with a SMALL 216/222-116+3 cam. Comp has since upgraded those springs and I don't know that to be a problem any longer, but every since then
nothing less than duals on my stuff. Interesting enough, the stock ls6 springs never broke.
Using STOCK lifters and TFS215 heads (650 dual springs) and a 224/228-112+2, never had valve problems, at least that I knew of.
Note, the inner spring is more of a safety net. Better for a valve to fail in closed position vs drop in to the piston.
A few years back I broke 10 of 16 behive (918) springs with a SMALL 216/222-116+3 cam. Comp has since upgraded those springs and I don't know that to be a problem any longer, but every since then
nothing less than duals on my stuff. Interesting enough, the stock ls6 springs never broke.
Using STOCK lifters and TFS215 heads (650 dual springs) and a 224/228-112+2, never had valve problems, at least that I knew of.
Note, the inner spring is more of a safety net. Better for a valve to fail in closed position vs drop in to the piston.