Esslinger Engineering of South El Monte, California, is primarily in the business of building midget engines based on Ford internals. The company has been in this line of work since 1990.
Because its engines are not based on pushrod designs, Dan Esslinger, president, says there are not very many valve-spring issues. “It’s just the design of the engine and the design of the camshaft,” he says. “Even though we turn a lot of rpms (in the neighborhood of 10,000), we are not cycling the kind of weight that a pushrod engine would, so the valve springs haven’t been nearly the issue they have been for some other builders.” Read more…
For Morgan Lucas Racing’s John Stewart, tuner for second-year NHRA Top Fuel driver Shawn Langdon, the change from titanium valve springs to steel units was due to the cost. “A set of titanium springs is about $1500, and we can get a set of steel springs for about $500. They seem to last just as long,” Stewart says.
If a valve spring for a race engine is to survive a service life of 1400 race miles or 1600 absolute miles then it needs to be robust and reliable. In the Indy Racing League’s IZOD IndyCar Series, where the Honda Indy V8 is the sole motive power, Honda Performance Development (HPD) has gone with a steel, flat-top, double-valve spring without insert, to achieve the balance needed on road courses, street circuits, short ovals, speedways and superspeedways. 
Starting the NHRA Full Throttle Drag Racing Series Pro Stock season with a brand new Ford engine and car this year, veteran driver/tuner Larry Morgan faced many challenges. It’s been a trial-and-error situation for the Ohio-based entrant, particularly in the area of valve springs.
As the newest player in NASCAR’s Sprint Cup arena, Toyota Racing Development (TRD) in Costa Mesa, California is playing catch-up to manufacturers that have been in the sport for many, many years. According to David Currier, vice president of engine engineering for TRD, his company prefers to use multiple sources for its double-spring valve springs.
Van Dyne Engineering of Huntington Beach, California keeps it local when looking for valve springs to fit their big block Chevrolet engines used for offshore racing.
As the NHRA Full Throttle Drag Racing Series 24-race season wound to a close in early November, the Matco Tools Top Fuel team with driver Antron Brown, a group that had changed ownership twice over the off-season, did so again when it was sold to Don Schumacher Racing just before the penultimate round on The Strip at Las Vegas Motor Speedway.
What does it take to build a better valve spring for USAC National Midget use? Frank Honsowetz of Ed Pink Racing Engines (EPRE) in Van Nuys, California cites a long-term relationship with Steve Pound at PSI Springs as his great starting point.
The overhead cam Suzuki engine campaigned by 2007 NHRA Full Throttle Drag Racing Series Matt Smith in the Pro Stock Motorcycle category “pretty much controls the valves,” according to engine builder Steve Tartaglia. “Because we don’t run pushrods,
There are valvetrain tricks to making good power and obtaining durability and longevity from a Dodge Mopar USAC National Midget engine, according to engine builder Bob Wirth of Hayward, California. “We need them all.”
