Pac 1511X Valve Spring Kit Locks Retainers LS1 LS2 L98 LS3 V8 VT VX VY VZ VE V8

$499.95

In Stock

Pac 1511X Valve Spring Kit Locks Retainers LS1 LS2 L98 LS3 V8 VT VX VY VZ VE V8

Description
Reviews

Pac Racing 1511X Valve Spring kit with Hardened Steel Valve Locks / Collets & Manley Chromoly Retainers
Suitable for LS1, LS2, LS3 & L98 V8 Holden Commodore & HSV VT-VF Models

PAC racing valve springs employ cutting edge technology in material advancements and processing resulting in superior race track results and reliability. PAC provide unparalleled attention to detail; from design to manufacture and customer satisfaction, in fact no detail is left unnoticed.

The 1200 series beehive valve springs use a premium alloy that out performs automotive industry standards to ensure the springs maintain the load needed to withstand the rigors of street performance and mild racing applications.
Additionally PAC Racing Springs processes these springs to aerospace shotpeening standards to allow for superior resistance to wear and fatigue, and they are capable of happily handling aftermarket camshaft grinds up to a massive .625” valve lift (with 1.7 rocker ratio).

This kit includes 16 valve springs, and is supplied complete with heavy duty hardened steel valve locks / collets & Manley chromoly valve retainers. As such this valve spring set is built to withstand the rigors of drag and circuit racing applications, not to mention serious street performance.

So will the PAC 1511X suit my needs? The answer would be a resounding “yes” if you have a camshaft grind greater than .625” lift at the valve, noting that the 1511 spring copes with up to .650” lift camshafts.

The stiffer PAC 1511X valve springs help prevent both valve float and valve bounce. Valve float is an adverse condition which can occur at high engine speeds when the valve does not properly follow the closure phase of the cam lobe. This reduces engine efficiency and performance, and represents a significant risk of severe engine damage due to valve spring damage or pistons contacting the valves. They also negate valve bounce which is a related condition where the valve does not stay seated due to the combined effects of the valve's inertia and resonance of metallic valve springs that reduce the closing force, and allow the valve to re-open partially.

PAC 1511X Valve Spring Specifications:

Part Number: PAC-1511
Description: 0.650" Beehive Valve Springs
Spring Type: Single Beehive
Seat Pressure: 130 LBS @ 1.800
Open Pressure: 370 LBS @ 1.175
Spring Rate: 385
Max Coil Bind: 1.110
Max Lift: .650"
Contains 16 springs

Hardened Steel Valve Locks / Collets & Manley Heavy Duty Chromoly Valve Retainers
Suitable for LS1, LS2, LS3 & L98 V8 Holden Commodore & HSV VT-VF Models

These Manley retainers are made from 4140 grade chromoly steel. They are heat treated, black oxide finished and processed to maintain high strength with a lightweight design.
Manley retainers are precision-machined for accuracy.
The valve locks are precision-machined for accuracy and are made from heavy duty hardened steel.
Recommended as an upgrade due to the superior strength and durability over the standard items.

Manley Retainer Specifications:

16 x Manley 4140 Grade Chromoly Steel Valve Retainers
Supplied as a full set (16 units) which is enough to do all 16 valves in these engines
Please note, as these are purchased in bulk and then packaged in to individual sets, these are supplied in plain, unbranded packaging.

Lock / Collet Specifications:

32 x Hardened Steel Valve Locks / Collets (unbranded)
Supplied as a full set (32 units) which is enough to do all 16 valves in these engines
1-Groove beadlock style

WARRANTY: Tuff Car Parts is committed to giving our customers the best buying experience available online when purchasing automotive parts. This includes us proudly supporting all products we sell with our own 12 month warranty. If a part fails and is covered by a manufacturer’s warranty Tuff Car Parts will gladly follow up all warranty claims on your behalf, meaning you can get a replacement as soon as possible without the headache of dealing with warranty departments yourself. Collateral damage is not covered by PAC Racing Springs, and as such cannot be covered by Tuff Car Parts.