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Comp 915 vs 918

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Old Mar 27, 2008 | 12:55 PM
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Default Comp 915 vs 918
Whats the difference between the Comp 915's and the 918's? The cam I am going to use has a lift of .563" and RPM's will probably not go above 6500 and was wondering which would be a better choice.
Last edited by marovetsm; Mar 27, 2008 at 01:17 PM.
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Old Mar 27, 2008 | 02:40 PM
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The 918s are a stiffer spring, and handle up to .600 lift. You could probably get away with either, but for the small price difference, why not go with the stronger 918's. Theyre tried and true.
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Old Mar 27, 2008 | 04:07 PM
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Tried and true my ***. I just went up to the dealership, my car has been up there all day. They have been trying to figure out why my car has been running so wierd. I broke a 918 spring after just 6000 miles.
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Old Mar 27, 2008 | 04:14 PM
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Go with either the PAC 1218 or the 1518. Same type of spring but much better quality.
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Old Mar 27, 2008 | 04:25 PM
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Originally Posted by Stang's Bane
Go with either the PAC 1218 or the 1518. Same type of spring but much better quality.
What he said.
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Old Mar 27, 2008 | 04:58 PM
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Originally Posted by oneblackTA2000
Tried and true my ***. I just went up to the dealership, my car has been up there all day. They have been trying to figure out why my car has been running so wierd. I broke a 918 spring after just 6000 miles.
Well, they did have that bad batch last year... Probably should have mentioned that. However prior to that, and past that, people have been running them for years without problems.
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Old Mar 27, 2008 | 05:48 PM
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After talking with Chris at PAC I have total confidence in their product you can find them on our site here

http://www.ls1speed.com/cont.cfm?cid=C0000794

I have a couple sets of the 1518s I can discount if anyones interested
Last edited by Fraser@SpeedInc; Mar 27, 2008 at 09:32 PM.
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Old Mar 27, 2008 | 08:11 PM
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Originally Posted by GuitsBoy
However prior to that, and past that, people have been running them for years without problems.
That's because they were PACs.
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Old Mar 28, 2008 | 06:35 AM
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Originally Posted by Fraser@SpeedInc
After talking with Chris at PAC I have total confidence in their product you can find them on our site here

http://www.ls1speed.com/cont.cfm?cid=C0000794

I have a couple sets of the 1518s I can discount if anyones interested

Hey Fraser, those PAC1518's, can I use the same locks and retainers from a normal set of 918s on them?
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Old Mar 28, 2008 | 07:37 AM
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Originally Posted by Frost
Hey Fraser, those PAC1518's, can I use the same locks and retainers from a normal set of 918s on them?
Yes, you can
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