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

what dual valve springs for the 306 cam?

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Old Oct 11, 2007 | 07:41 PM
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mvvette97
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From: leon iowa
what dual valve springs for the 306 cam?
Just wondering what everybody is using with the 306 comp cam. I don't like the 918 that comp says to use because I broke 8 out of 16 on my LS1. What is a good dual spring?
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Old Oct 11, 2007 | 07:55 PM
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Why not go with some single beehives from pac?
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Old Oct 11, 2007 | 07:58 PM
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From: leon iowa
Originally Posted by blueformula350
Why not go with some single beehives from pac?
well I just don't trust the single spring anymore since they just about destroyed my LS1. I like the piece of mind with a daul spring
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Old Oct 11, 2007 | 07:59 PM
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dual springs can break too.
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Old Oct 11, 2007 | 08:01 PM
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From: leon iowa
Originally Posted by raroz28
dual springs can break too.
very true but with a dual you have one more spring to hold the valve from bashing the piston. Normally both of them don't break
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Old Oct 11, 2007 | 08:08 PM
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From: Jackstandican
Originally Posted by mvvette97
Just wondering what everybody is using with the 306 comp cam. I don't like the 918 that comp says to use because I broke 8 out of 16 on my LS1. What is a good dual spring?
Go to Comp's website and see what they recommend.
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Old Oct 11, 2007 | 08:35 PM
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Originally Posted by SS RRR
Go to Comp's website and see what they recommend.
They reccomend their products.
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Old Oct 11, 2007 | 09:21 PM
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I'm using Crane 10308 spring kit.. I've used them on a few LT1 builds. .Worked great.. Never had any problems yet..
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Old Oct 11, 2007 | 09:23 PM
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From: leon iowa
Originally Posted by hotrod18_69
I'm using Crane 10308 spring kit.. I've used them on a few LT1 builds. .Worked great.. Never had any problems yet..
Are they a direct fit on the stock heads?
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Old Oct 11, 2007 | 09:34 PM
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Originally Posted by mvvette97
Are they a direct fit on the stock heads?
Yes DIRECT FIT.. Just put them on..

http://store.summitracing.com/partde...0&autoview=sku
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Old Oct 11, 2007 | 09:35 PM
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From: leon iowa
Originally Posted by hotrod18_69
Yes DIRECT FIT.. Just put them on..

http://store.summitracing.com/partde...0&autoview=sku
Sweet, I guess I'll get those, thanks
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Old Oct 11, 2007 | 09:36 PM
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Yup.. No problem..
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Old Oct 11, 2007 | 09:59 PM
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Originally Posted by hotrod18_69
Yes DIRECT FIT.. Just put them on.
You can put a 1.460 OD spring on a stock head? No machining?
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Old Oct 11, 2007 | 10:03 PM
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From: leon iowa
Originally Posted by Stl94LT1
You can put a 1.460 OD spring on a stock head? No machining?
what size is the OD on the stockers?
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Old Oct 11, 2007 | 10:16 PM
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Originally Posted by mvvette97
what size is the OD on the stockers?
1.334" for the stock LT4 spring.
Last edited by Stl94LT1; Oct 11, 2007 at 10:18 PM.
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