Brulé attributed the slight horsepower dip to both the lower airflow of a single throttle blade as well as plenum volume and the position of the throttle blade in relation to the intake ports. While a 22 horsepower drop from the dual 4500 throttle bodies, this setup offers a much more progressive throttle opening that will deliver significantly improved drivability compared to either of the dual-quad throttle bodies. On the dyno, it delivered 732hp and 606 lb-ft of torque. Ls intake manifold upgrade#This throttle body flows a huge amount of air and is an upgrade form the standard GM 90mm throttle body. For the first test, we equipped it with a 105mm Holley EFI billet throttle body. This plenum is hugely popular with LS enthusiasts and is a great option for naturally aspirated and boosted applications. Holley's single throttle body plenum (PN 300-246), complete with Holley 105mm throttle body is a very popular combination that makes great power and is perfect for power adder applications.įor the next test, we unbolted the 4500 plenum and moved to a single throttle body, front-feed plenum (PN 300-246). Holley Hi-Ram with Dual 4150 Throttle Bodies Each of these intake configurations represents a popular combination used for a wide range of racing types, so putting them all on the dyno with the same engine would paint a very clear picture where each of them shines. 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. JUNKYARD TRUCK LS vs TBSS & OTHER BIG BUCK INTAKES! ARE THEY WORTH IT? WHAT IS THE PROVERBIAL “BEST” INTAKE FOR YOUR LS APPLICATION? CHECK OUT THIS VIDEO WHERE WE COMPARE THE DIRT-CHEAP, 4.8L/5.3L/6.0L TRUCK INTAKE TO A NUMBER OF OTHER POSSIBLE CONTENDERS, INCLUDING THE LS6, TBSS, HOLLEY HI-RAM AND FAST LSXRT.The test mule for this dyno session was a 440ci LS7-based engine that was built to run on E85. There’s more to this than just bolting on some intakes. Like all of them.īut how do you decide if a low buck intake is better than a high dollar intake? Is it purely based on the power it can produce? Or do you have to factor the cost in? And does the engine combo matter? What if making crazy power isn’t what you are after? Hmmmmm. Ls intake manifold plus#But that was with 30 psi plus of boost A BUNCH of times. It would eventually come apart bad enough that it required a pretty extensive rebuild. We also proceeded to win all kinds of other races with it too, but only after splitting it at the seams a few times and having to have Bigun weld it back up. When we built Beer Money for the $10K drag shootout we used a generic sheet metal intake manifold that everyone said wouldn’t live under boost, and proceeded to win $10,o00 with it. But which one is better when it comes to LS Intake manifolds? Can the factory GM truck manifold that came on a jillion LS engines keep up with the big money intakes? I can tell you that we’ve made ridiculous power with a stock intake, and we’ve made ridiculous power with an expensive intake.
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