AFR Titan Series Intake Manifolds - Modern Manifolding

We had a chance to run all three of the Titan manifold configurations on a 372ci street small-block equipped with AFR street 195cc heads. These three configurations are designed to cover the needs of most conventional small-block Chevy engines, from street to serious race. The dual-plane DPR showed the broadest torque curve while retaining excellent power production into the higher rpm ranges. With the single-plane TXS, we saw the textbook trade in low-end torque for higher rpm output that would be expected when swapping from a single-plane to a dual-plane manifold. This would be the ticket for combinations where top end power trumps low-end torque requirements, such as applications with high-stall torque converters that never see the lower end of the rpm range. The TXR high-rise single-plane is designed for serious engines, and the moderate power of our street/strip engine wasn’t really at a level that would demand an intake of that capacity. Interestingly, the TXR race did show a power gain compared to the smaller TXS, even with our moderate combination. On a serious big-inch small-block, we’d expect even bigger power gains with the TXR.

The Engine

While 372 ci might seem like an unusual combination, the bottom end of our engine is based upon a Dart SHP short-block assembly, offered with a bore and stroke of 4.125 inches and 3.480 inches. Featuring all forged internals, this big-bore, short-stroke combination is virtually bulletproof, and it delivers a compression ratio of 10.5:1 with the AFR 195cc street heads on our motor. Valve action is provided by a COMP 242/248-degree duration at .050 hydraulic roller cam. While the cubes are moderate compared to some of the common longstroke combinations, the power output and willing rpm make this a standout piece.

Dyno Results

AFR Titan Manifolds 373ci small-block Chevy