The intakes set to be tested were a Holley Hi-Ram with dual 4150 throttle bodies, dual 4500 throttle bodies, a front feed plenum, and MSD’s popular Atomic AirForce polymer intake.
Gasket electric water pump supplied dyno coolant, and the exhaust consisted of a pair of Hooker stainless steel headers." The ignition system consisted of MSD, LS-style coils, a Mr.
This engine was built to run on E85 so it uses a 13:1 compression ratio, an LS7 style cylinder head and a robust valvetrain capable of over 7,000 rpm. "There’s no discounting the popularity and proven performance of the LS engine architecture, so for this test we recruited a freshly built 440ci, LS7-style engine. It features 13:1 compression, Holley EFI, and a fully CNC'd top end. The test mule for this dyno session was a 440ci LS7-based engine that was built to run on E85. Gasket electric water pump, a set of MSD Coils, a pair of Hooker stainless steel headers, and a Holley EFI Dominator ECU rounded out our 440ci LS7-based test engine. To illustrate just how drastically choosing the right one is, we put three of our most popular manifolds to the test on the dyno at Westech Performance.Ī Mr. There are countless intake manifolds available in different styles, for various engine architectures, and for radically different applications across the Holley product line. Intake manifolds and their respective throttle assemblies are one of the big three components– the other two being cylinder heads and camshafts– that play the biggest role in not only how much power an engine produces, but in how it’s delivered. No single component exists without affecting those around it, and selecting parts that not only work well with each other, but deliver the appropriate performance for the engine’s intended usage is key, to a perfect power plant. In the world of engines, the same time-honored adage applies.
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