Below are the available bulk discount rates for each individual item when you purchase a certain amount
Our Vortec kit is engineered specifically for Iron Vortec heads. Also fits iron LT1 heads such as used on 96 Impala. That's right, no machine work required to set up a pair of SBC Iron Vortec heads for .550" lift.
We engineered this kit with all the right parts just so Vortec head owners won't have to machine the spring seats and guides to run up to .550" lift.
Great for engines with 1.6, high ratio rockers.
Yes, works with self aligning rockers as well as heads w/ screw in studs and guide plates and std, non self aligning rockers.
As you may already know, Vortec heads have a problem w/ retainer to seal clearance. The stock retainers and springs do not allow for more then around .460" lift.
We use a special retainer and spring combination which solves two vortec head problems.
The retainer to seal clearance issue.
Spring base diameter issue (vortec heads will not accept common SBC springs)
The issue with clearance between the retainer and seal was solved by producting a special retainer which offers maximum clearance between the bottom side of retainer and the top of the seal. The bottom of the retainer is pretty much "flush" with the bottom edge of the locks. This design offers maximum clearance without compromising strength or requiring the guides to be shortened.
Our springs are a perfect fit on the stock Vortec spring base.
Both problems solved!
Stock valves have .260" IN/.289" EX Tip lengths which will generally allow for up to .550" lift.
It it durable? Yes! This same kit is running on hundreds of Vortec engine world wide.
Kit comes with:
For 130 Lb seat pressure, we recommend purchasing a shim kit to facilitate setting up the proper installed height. Read the tech info under the "Valve Spring Shims" catagory for more details about how to set up installed height.
Suitable for many Hyd Roller cams w/ up to 244 degrees duration @ .050"
Hydraulic roller cams in need of stiffer springs can contact us for other options including a LS series dual spring conversion kit for SBC Vortec.
IRON LT1- Although the kit was engineered for iron vortec, we discovered iron LT1 heads suffer from the same issues as vortec and found our spring kit worked just as well on them also. Note- Specified for iron LT1 from the mid 90's, not early LT1 such as used in 69-70. Be sure to measure LT1 iron head guide diameters to verify of your iron LT1 will accept 11/32" X .552" seals.
Requirements- Valve Seal replacement is highly suggested. It's important for the installer to make 100% sure the seals are fully seated down on the guide. Seals which are not fully seated will reduce maximum lift capacity. It's the installers responsibility to take measurements between retainer bottom and seal top to verify there is suitable clearance.
Vortec heads normally use: 11/32" X .552" seals but we have seen some guides measure up to .558". Other seal sizes are available under the 11/32" positive category.
NOTE-1- Spring installed height must be checked and shimmed as necessary.
NOTE-2- Not for Gen III/IV LS series aluminum head Vortec. Check our other spring kits for these applications.
NOTE-3- We do not recommend the use of "HOWARDS" brand self aligning rockers. Due to their bulky design, clearance between rocker and retainer are either limited or non existant. Most other brands of self aligning rockers work fine. Be sure to verify suitable clearances exist.
OPTIONS; Buyers may choose from several different companion items required for proper valve spring kit installation. At the top of this page, there are several check boxes.
There are two versions of shims available; Hardened and Std. (we recommend going with hardened) Our Viton valve seals fit stock vortec guide boss diameters of .552"-.556"(stock)
The installed height micrometer is a modified version which fits Vortec heads. The way these tools come from the factory, they won't fit over the Vortecs large guide diameter at the base, our vortec tools have been specially machined to sit further down than std production installed height tools, a must for Vortec applications.
Alex's Parts- The smart choice in valve train parts~