LS1 Comp Cams Hydraulic Roller Camshaft Upgrade - Cam'd For Power

While the LS tool was still installed, we lubed up the new cam lobes, slid it into place, and checked to make sure that the cam could spin freely. Next we removed the rods from both sides, which then allowed for the lifters to fall back onto the cam.

We reinstalled the cam plate, lined up the cam gear with the timing marks, and bolted it back down. All that was left was putting the timing cover back on with the 10mm bolts.

The LS was almost ready to make some pulls. However, we needed to reinstall the balancer (which was already marked), bolt on the tensioner and water pump, and lash the valves. Lastly, we ran the serpentine belt to complete the whole system.

Boost
No doubt, MagnaCharger's 2300 series TVS (Twin Vortices Series) kit is stout. If you're looking to push the limits with this system, you can expect to see numbers in the neighborhood of 1,100 hp when set up properly with a robust bottom end, such as a GMPP LSX block. We're currently contemplating a home for this monster, so don't be surprised when we decide to add a bit more boost with a set of stickies and flog it at the track.

Total peak gains came out to an additional 25 hp and 2 lb-ft with no other changes than the cam swap. When it came to ignition timing, the previous cam was happy at 27 degrees of advance, whereas the positive displacement version wanted to be at 29 degrees of advance. Boost was also affected, previously peaking at 6,600 rpm with 8.2 pounds of boost, while the new 'stick peaked out at 6,800 rpm with slightly less boost, 7.8 pounds. As you can see on the dyno chart, there was practically no loss of bottom-end power from 3,900 rpm on up. Looking at it from a point-to-point perspective, we saw even larger gains of 30 hp at 6,800 rpm and 23 lb-ft at 6,900 rpm.