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Speed Secrets: How Much Power Do You Get From Heads/Cam/Intake on an LS1?

Speed Secrets, COMP Cams, FAST, and RHS team up on this test to see how much horsepower you can get out of 5.7-liter LS1 when you upgrade the heads, camshaft, and intake manifold.

Truth be told, this combination of upgrades can be applied to an LS engine to get similar results you will soon see from the test. From the 4.8-liter, through to the 7.0-liter engines, these engines respond! In all reality, the same concept is true for any make of engine you’re looking to upgrade – import or domestic.

To back it up, are you wondering why you would upgrade the heads, cam, or intake on an engine? It’s because the source of added power primarily comes from these systems. That’s not to say the majority of the power doesn’t come from the displacement and bottom end, but if you want to take that power to a new level, it’s time to upgrade these three parts.

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Obviously, people do upgrade just one of these, with the camshaft being the most popular engine upgrade for LS owners. However, after you upgrade the camshaft, you’re still leaving a lot of power on the table if you leave the other two stock. Actually, after you’ve upgraded one, the other two are even more important to upgrade than they were in a stock application.

The test engine in this video is an LS1 crate engine from an early Camaro. After getting a baseline on the dyno, it was time to do the upgrades from RHS, COMP, and FAST.

RHS provided a pair of 205 heads to replace the factory LS1 cylinder heads, and a healthy 54-459-11 COMP camshaft with a .617/.624 lift, 231/239 duration, and 113 LSA. A FAST LSXR intake manifold and 102mm throttle body.

The result is a gain of 125-horsepower and 46 lbs/ft of torque. Watch the video now to see the full test and final power figures!