sS07NA

Looking at zzp cams for my 2.4 sc and I seen something about their 82lb valve springs are no good? Also looking at ottp 80lb, Which ones should I go with? Thx

Jesse

iTrader: (4)

Performance autowerks springs are the best springs you can buy. Wish I didn't sell mine. I want them back now lol.

sS07NA

thx alot 👍

jdbaugh1

iTrader: (1)

82lb valve springs are fine. Been running mine with ZZP S2 LSJ blower cams and revving to 8k for a while now.

chevygirl2006

Get super tech 75# springs. They are a double spring

Slowbalt2000

iTrader: (1)

I would go with supertech

sS07NA

Thx guys

TurboTechRacing

iTrader: (24)

Super tech all the way, we have them instock also

sS07NA

thx

sS07NA

Any specials going on ?

TurboTechRacing

iTrader: (24)

We should be the lowest out there, if not PM us with a link.

steelmesh

Myth with dual springs is you have redundancy if a spring breaks saving your engine. Not entirely true: if your dual spring lets go at redline, it's still going to cause damage trying to make the valve and piston occupy the same space at the same time.

jdbaugh1

iTrader: (1)

I thought I had saw somewhere that the dual spring configuration has better harmonics or something like that.

steelmesh

What I learned about valve springs is there is no right answer, it is an art (because harmonics plays a huge role). In this specific application the dual spring notion could be true [also consider the limited choices for this application can make it true]. I did ask one of the race spring engineers what the advantage of extra springs are and he said really just to get more spring load....so you can interpolate benefits from there.

One of the best performing high lift drag springs PAC sells are the 1300 dual springs, which can take the place of triples. With a smaller diameter dual spring vs. a bigger triple you get lower mass (smaller retainer, effective spring mass) and you get a higher natural frequency (therefore improved high rpm valve control) and there is also some amount to gain from running a lower spring load (since you now have better valve control).

This assumes you want to win races, notice there is no mention of longevity and endurance. These springs will for sure break, gotta inspect all the springs for load loss after every run and save expensive parts. The springs are treated with cold working and super high intensity shot peening and some other tricks which help the spring survive. If you calculate the theoretical maximum material stress on these high performance springs (based on geometry and math formulas) you'd be extremely surprised the springs are being stressed beyond the capability of the raw material!! Compressive residual stresses are amazing.

steelmesh

All this talk of residual stresses made me pack up my springs and oil gerotor pump to ship out to WPC for some peening. Thanks alot.