Valve spring guidance

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Feb 25, 2008 | 12:27 PM

tiki240

Thread Starter

Racer

Joined: Mar 2007

Posts: 337

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From: yorktown virginia

Valve spring guidance

I just bought a G5X2 cam, and I was wondering if the following springs will be sufficient for the application. Im running a stock 5.7L LS1

here are the specs on the cam

232/240 .595/.608 112LSA

here are the specs on the springs in question

Chrome Silicon Dual w/ damper

135 lbs. @ 1.875"

395 lbs. @ 1.225"

400 lbs. rate per inch....set of 16 in package

coil bind 1.160"

Maximum Lift .650"

outer 1.530" O.D. inner 1.005" O.D.

Feb 25, 2008 | 01:40 PM

tiki240

Thread Starter

Racer

Joined: Mar 2007

Posts: 337

Likes: 0

From: yorktown virginia

any cam gurus online middle of the day?

Feb 25, 2008 | 01:42 PM

racetchr

Pro

Joined: Oct 2000

Posts: 545

Likes: 1

From: Charlotte NC

I have run this particular cam and think you have more than enough spring with this cam.

Feb 25, 2008 | 04:59 PM

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

Likes: 192

From: At the beach in little Rhody

Do those come with retainers? Here is my concern. You are going to set up at 165 lbs on the seat with a 1.800" installed height. If they install at 1.875, then the retainer will sit high on the valve stem and you could have contact issues with the rocker. What is the diameter of the spring? Whose springs are these?

PS: PAC just introduced a dynamite dual for the LSx head.

Feb 25, 2008 | 05:17 PM

tiki240

Thread Starter

Racer

Joined: Mar 2007

Posts: 337

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From: yorktown virginia

PMed you both :-D

Feb 25, 2008 | 05:55 PM

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

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From: At the beach in little Rhody

OD is way to big for stock heads without machining. You need to get an LS1 designed valve spring.

Feb 25, 2008 | 06:08 PM

vettenuts

Team Owner

Joined: Mar 1999

Posts: 22,025

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From: At the beach in little Rhody

Contact LG, they will likely recommend the Comp 921's. Crane 833's will work as well and the set is a little less money.

Feb 25, 2008 | 06:45 PM

chriswtx

Le Mans Master

Joined: Feb 2002

Posts: 5,970

Likes: 20

From: San Marcos Texas

Quote:

Originally Posted by vettenuts

OD is way to big for stock heads without machining. You need to get an LS1 designed valve spring.

Those wont fit a stock head, to big OD wise..You need a 1.3" OD spring. Patriot gold springs(Patriot heads) are perfect, come with titanium retainers, locks, and new valve seals for $255...