Month: March 2025

Valve Spring Pocket Clearance

Valve spring pocket clearance is the gap between the inside diameter of the valve spring pocket (or cup, if used) and the outside diameter of the valve spring.
Too much clearance will result in the spring “dancing” around in the head, which “beats up” the spring mounting surface and the spring itself. If this is the case, a spring cup may be used. Additional machining of the spring pocket may be required to accept the spring cup. 
Not enough clearance will bind the spring in the pocket, overstressing the bottom coil by limiting its movement and not allowing the spring to “grow”. This will cause the bottom coil to wear against the head and/or prematurely fail. Machine the valve pocket using a Spring Seat Cutter if not enough clearance exists.
 

STK High-Performance Stainless Steel 21-4N?
The STK Performance Valve is forged using 21-4N Stainless Steel which is strong and can handle most applications.
 

Dual Valve Spring sets consist of an innerspring and an outer spring per valve.

These springs are rated at 200 pounds pressure compared to a standard production spring of around 80 – 90 pounds pressure.
 

STK Performance Cam Bucket for Mechanical / Solid Application
 
( Volkswagen 8v & 16v )

Part Number STK3S
 

REV Kits
We receive calls daily regarding requests for Rev Kits… unfortunately, the understanding of a Rev Kit is completely misunderstood and we’d like to point you in the right direction should you be considering upgrading your ride…
 

There is so much debate around camshafts, which is the best to use, mild or wild duration, high or mild lift, which degree makes the most power, and if it works on the track, will it work for me? These questions are generally thrown around on forums and social media networks with some realistic and unbelievable results, dyno charts, flow charts and claims of power that we all want but are not in our budget or best interests for our everyday drive.
 

When operating at high RPM it is advisable to replace the standard production valve spring with a heavy-duty valve spring.
 

Performance camshafts are referred to as billets in the trade, but this is incorrect in this case.

A Billet is machined from a round bar of iron, in our case they should be referred to as Blanks which are cast.

As most enquiries over the years have been based on Billets, we continue the trend to avoid confusion.
Performance camshafts are referred to as billets in the trade, but this is incorrect in this case.

A Billet is machined from a round bar of iron, in our case they should be referred to as Blanks which are cast.

As most enquiries over the years have been based on Billets, we continue the trend to avoid confusion.
 

For performance enthusiasts and tuners, precise fuel pressure control is a crucial factor in optimizing engine performance. Introducing the FUEL PRESSURE REGULATOR EFI – AN10 INLET, AN6 RETURN, a high-quality, precision-engineered solution designed to deliver stable and consistent fuel pressure for high-performance fuel injection systems.
 

How a 1971 De Tomaso Pantera Became the Ultimate Tribute Build 
Every gearhead has that one car—the holy grail, the dream machine, the ride that fuels fantasies of tearing up asphalt with unrelenting power. For Wisconsin’s own Randy Brickl, that car was the De Tomaso Pantera. With the exotic flair of an Italian supercar and the brute force of American muscle, the Pantera was a wild fusion of speed and style. It was also a favorite of the King himself—Elvis Presley owned one in yellow, and Randy had his sights set on a matching machine.

Randy managed to track down a yellow Pantera, but the car needed serious work. Undeterred, he planned to restore it himself, piece by piece. But life had other plans. Diagnosed with cancer, he was forced to put the project on hold. Despite a hard-fought battle, Randy passed away, leaving his dream unfinished.