With all other factors remaining equal, the easiest way to add horsepower to a carburetor equipped muscle car is to lower the temperature of air entering the engine. That’s easier said than done since standard air cleaner systems draw air from inside the engine bay. Those open-element air cleaners may look cool and classic, but they’re costing horsepower!
In its continuing quest to develop the best induction systems in the industry for vintage muscle cars, Spectre’s newest breakthrough is the DTM intake system. By pulling air from outside the engine bay, Spectre saw an impressive gains of 20 horsepower and 23 lb-ft of torque peak on a standard 350 crate motor equipped test car. That equated to an impressive 6.71% increase – all from swapping to a DTM intake!
The power “secret” is something new car builders have known for years – funneling cold, dense air into the cylinders from outside the engine by improves power. While testing on two identical 2nd Gen Camaros showed ambient underhood temperatures hovering in the 140 degree range, the average temperature of the air entering the engine through the DTM intake was only 100 degrees. That 40 degree drop correlates to a much denser air mass and better combustion. Real world driving with constant fresh air circulation would likely produce even better drops. This cold-air effect is also available in Spectre’s Ram Air systems and Headlight Air Scoops.
On top of those benefits, the DTM was also designed to be one of the lowest air intake systems on the market, making it perfect benefit for hot rodders with tall deck engines and high rise manifolds that want to avoid swapping to a new hood for clearance. The one-piece cast aluminum plenum is available in cast or polished finishes and can be configured with single or dual polished, mandrel bent 4-inch aluminum intake tubes that pull cool air from the fenderwells or from the headlight buckets. Both systems use high-flow Spectre hpR filters and laser-cut aluminum heat shields. The Spectre DTM intake system is currently available for 1967-’81 F-Bodies, 1964-’72 Chevelles, and 1966-’74 Novas, with more applications coming soon. All necessary brackets, adapters, hardware, and complete step-by-step instructions to make installation easy are included.