LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

le2.2 spring life and what Miles you're replacing them at

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Old Jun 16, 2007 | 02:21 PM
  #16  
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From: stuart fl
2QUIK6 I sent you a p.m. about your bills
Old Jun 16, 2007 | 02:29 PM
  #17  
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From: stuart fl
In quantities of 10 the regular 1218 are only a hundred that's real cheap.thats if this prising is still good
Old Jun 16, 2007 | 10:27 PM
  #18  
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From: stuart fl
Here's a link to the page for the group by post if you're

http://web.camaross.com/forums/showt...06#post4665206
Old Jun 17, 2007 | 08:39 AM
  #19  
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From: stuart fl
It looks like we have 10 all ready. Let's just see if pac can send them in different directions
Old Jun 18, 2007 | 07:36 AM
  #20  
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Originally Posted by 2QUIK6
Notice to that even though the 1218 and 1518 deminsions are the same, the max lift on the 1518s is .650 and the 1218s is .600...wonder why that is?
Dimensions are the same. The 1218 will allow up to .650" lift without coil bind issues. We recommend our PAC-1518 for anything above .600 lift because of the higher stress range. It's also a better spring for engines that will be turning higher RPMs. The nitriding and other added processes we do give the springs even better fatigue life then the 1218. I have ran the 1518 from free length to solid on our testers and haven't been able to break one after double our normal test length.
Old Jun 18, 2007 | 06:10 PM
  #21  
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Originally Posted by 2QUIK6
I'd be game to buy a couple of sets, heck maybe 3 or 4 since I have 2 LTx motors with .560-.600 lift cams.
Im not sure why Bret and LE don't use them to begin with as many sets of springs as those guys sell. LE uses the same 1218's I'm sure as him and Bret work very close together on their combos.

Notice to that even though the 1218 and 1518 deminsions are the same, the max lift on the 1518s is .650 and the 1218s is .600...wonder why that is?
1218's are usually way more spring than is needed here. We have only had sets go that 15,000-20,000 miles and replacing the springs at that point is preventative, that's all. Not because there are any failures or low spring pressures but because it's much better to be safe than to bend a valve from a spring that has run it's life. Besides, the spring manufacturing and material quality of the PAC springs is above and beyond other parts on the market. If you look in LS1 land at the all popular Patriot Springs, PAC's springs (even what people consider lowly beehives) are hands down a much superior product.

The 1518's bring a $100+ premimum per set, but have a longer endurance. Almost a infinate life, but I don't really like saying that.

The reason we haven't used them in the packages is price. A premium spring, brings a premium price and that is something customers don't usually grasp in the greater market place. Not saying customers are dumb, but there are a lot of guys who don't understand the importance of valvesprings and why they are paying for a premium product when a cheaper one will do the job.

Personally I would put the nitited springs in my personal motors, but on most street builds running a hyd roller cam it's not a easy sell to put $300 springs in there, even though in the end they are cheaper thru less replacement cost of labor and parts.

Bret
Old Jun 18, 2007 | 09:24 PM
  #22  
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From: stuart fl
High bret thank you for posting you answered a lot of the questions we were looking for. you 2 have been a great help to me I had a lot of questions and you answered everyone. If I would have known that you guys may be able to do a group by I would have contacted you first you should post in the group by
Old Jun 19, 2007 | 12:35 PM
  #23  
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We can do one, but as I said prices aren't going to be the miracle prices of low $100's for a set of 1218's, that's just not going to happen.

Bret
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