Pac 1219 Valve Spring Kit + Locks Retainers LS1 LS2 L98 LS3 V8 VT VX VY VZ VE V8
Pac Racing 1219 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. 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. 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 1219 suit my needs? The answer would be a resounding “yes” if you have a camshaft grind up to. 625 lift at the valve. The stiffer PAC 1219 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 1219 Valve Spring Specifications. Description 1200 Series Beehive Valve Springs. Spring OD (Large end): 1.20. Spring ID (Large end): 0.885. Spring OD (Small end): 1.072. Spring ID (Small end): 0.650. Max Coil Bind: 1.100. 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. 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. 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. Collateral damage is not covered by PAC Racing Springs, and as such cannot be covered by Tuff Car Parts.
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