valve springs

Reply Subscribe

Thread Tools

Search this Thread

Oct 31, 2010 | 04:58 PM

denscor

Thread Starter

On The Tree

Joined: Jul 2003

Posts: 122

Likes: 0

From: West Virginia

valve springs

Anyone every tried Livernois Motorsports LS-Series Dual Valve Spring Kit?I need new springs and can't decide on this or PAC 1521.

Nov 1, 2010 | 12:57 PM

1lejohn

TECH Fanatic

iTrader: (9)

Joined: Mar 2004

Posts: 1,318

Likes: 0

From: Pasadena Texas

No haven't used those springs. Call them and ask who makes the springs for them. I have the Pacs now. I've used the Manley and GM springs in the past

Nov 1, 2010 | 01:33 PM

Gray86hatch

TECH Addict

iTrader: (83)

Joined: Sep 2009

Posts: 2,388

Likes: 4

From: Battle Creek Mi

depends on your cam and what it needs. The Lunati kit springs seem to be a good dual spring

Tim

Nov 1, 2010 | 01:36 PM

JustAnotherLS2

Teching In

Joined: Sep 2010

Posts: 46

Likes: 0

From: Ft.Lauderdale, FL

I hear good AND bad experiences with literally EVERY spring. Theres no way around it. There is no end all be all spring. To me, its like playing russian roullete with dropping valves.

Nov 1, 2010 | 02:46 PM

denscor

Thread Starter

On The Tree

Joined: Jul 2003

Posts: 122

Likes: 0

From: West Virginia

I have a .660 lift cam and it floats at high RPM plus I run 16 psi of boost.So I need something stronger. I have heard that you need a stronger spring when you run boost.Springs in it now are only up to .650 so its on the edge.

Nov 1, 2010 | 04:45 PM

TurboBuick6

TECH Enthusiast

iTrader: (2)

Joined: Oct 2010

Posts: 708

Likes: 125

Quote:

Originally Posted by denscor

If your cam is a .660 lift and the springs are only good to .650 you are probably running into coil bind. Get some PAC 1521's and call it good.

Yes when you are running boost you do need a stronger spring. You now have 16 lbs of force fighting against the intake valves.