L33_944

I want to get a 228R cam. It's got .588 (as most know) and i was wondering if i should get the PAC 1518 valve springs good for .650 lift for extra insurance? Or just stick with the PAC valve springs good for .600 lift?

Thanks,
Jeff

Sales4@Texas-Speed

iTrader: (4)

The PAC 1218's will have no problem holding the 228r cam, you will just see more life from the 1518s. We have never had an issue with a PAC spring so you can't go wrong either way.

L33_944

More life as in how long?? Also the 1518 wont rob power in any way will they?

Sales4@Texas-Speed

iTrader: (4)

I would expect the 1518's to put up 5-10k more then the 1218s. The 1518's won't rob any power at all on a cam like that.

GarrettM

iTrader: (6)

Im looking ar a TSP cam kit myself in the near future.

L33_944

whats the expected life on valve springs?? I assumed they would never really fail. Stock ones last 200,000km+ all day long in vehicles and when you get that high, whats another 5-10k?

GarrettM

iTrader: (6)

Im curious myself. I never really thought of that. What is the expected life on a performance valvespring on a cam car?

Sales4@Texas-Speed

iTrader: (4)

I would expect the 1218s to last around 20-25k miles on that cam, while the 1518s will work for 30-35k. All aftermarket valvesprings wear out over time, especially when used with the larger more aggressive aftermarket cams.

Dual valvesprings will last a lot longer on this cam. I would expect our PRC duals to go at least 45-50k before needing to be changed.

L33_944

you need to do some kind of machining for dual though correct??

I cant belive they would wear out in like 50km's. Interesting.

GarrettM

iTrader: (6)

Is machining required to run doubles? Also how much power is lost through doubles due to the fact of more effort needed to compress them over singles?

1SLwLS1

iTrader: (6)

How high are you revving this engine? Will valve train stability be a super crucial issue? I would go with springs rated closer to your lift for higher revving and/or for more stability. I am planning on adding shims to get mine within 0.050 of coil bind. Just adding more stability to the already maxed out stock valvetrain

L33_944

its not going to be crazy, im thinking 6000-6500RPM max

434strokergt45r

iTrader: (-1)

pac spring are good i have delt with them alot cant hurt to be on the safe side

L33_944

so whats the final verdict here?? Go with the 1518's (.650 lift) for the extra $25?

Justus67

iTrader: (3)

Its up to you, it sounds like the only real difference will be the valve life on that set-up. I'm going with the same set-up with the 1518's. The only thing I have left is to pick an LSA.

crazyelf

iTrader: (21)

25 bucks extra to delay a valve spring swap another 10k miles hmm.......hells yeah i would go for that!

Defined1983

iTrader: (20)

yeah that's a no brainer.

1SLwLS1

iTrader: (6)

I would go with the 1518s in your situation

garygnu

TSP sells the pac1518.