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Generation III Internal Engine 1997-2006 LS1 | LS6
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Looking at TSP's cam kit...

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Old Jun 10, 2010 | 07:29 AM
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Default Looking at TSP's cam kit...
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
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Old Jun 10, 2010 | 09:38 AM
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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.
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Old Jun 10, 2010 | 10:00 AM
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More life as in how long?? Also the 1518 wont rob power in any way will they?
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Old Jun 10, 2010 | 10:17 AM
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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.
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Old Jun 10, 2010 | 10:25 AM
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Im looking ar a TSP cam kit myself in the near future.
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Old Jun 10, 2010 | 10:33 AM
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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?
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Old Jun 10, 2010 | 10:42 AM
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Im curious myself. I never really thought of that. What is the expected life on a performance valvespring on a cam car?
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Old Jun 10, 2010 | 11:08 AM
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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.
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Old Jun 10, 2010 | 11:16 AM
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you need to do some kind of machining for dual though correct??

I cant belive they would wear out in like 50km's. Interesting.
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Old Jun 10, 2010 | 11:56 AM
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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?
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Old Jun 10, 2010 | 01:40 PM
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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
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Old Jun 10, 2010 | 04:41 PM
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its not going to be crazy, im thinking 6000-6500RPM max
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Old Jun 10, 2010 | 06:58 PM
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pac spring are good i have delt with them alot cant hurt to be on the safe side
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Old Jun 10, 2010 | 09:29 PM
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so whats the final verdict here?? Go with the 1518's (.650 lift) for the extra $25?
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Old Jun 10, 2010 | 09:53 PM
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Originally Posted by JohnJanz@Texas-Speed
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.
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.
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Old Jun 11, 2010 | 01:50 AM
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25 bucks extra to delay a valve spring swap another 10k miles hmm.......hells yeah i would go for that!
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Old Jun 11, 2010 | 03:03 PM
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yeah that's a no brainer.
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Old Jun 11, 2010 | 03:05 PM
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I would go with the 1518s in your situation
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Old Jun 11, 2010 | 04:13 PM
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TSP sells the pac1518.
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