We recently got the opportunity to install and test performance gains with Comp Cams new Max Effort NSR XFI cams for the new Coyote power plant. The test subject was a 2012 Boss 302 in beautiful Competition Orange. We began the test with a baseline horsepower pull on our Dynojet 224x dynamometer. The Boss came to us with a few mods already performed but mostly still in stock form. Here is the mod list for the baseline:

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With just the JLT Cold air kit, stock exhaust, and Lund Racing tune, we found baseline performance to be 403 RWHP and 355 RWTQ. We were interested to see what the power gains would be once the camshaft set was installed and tuned. Installation of any camshaft set on a newer Coyote 5.0L engine should be done by an experienced professional. There are a lot of moving parts and assemblies that have to be done right. PBH Performance estimates a 10-12 hour installation time depending on options. In this case, we opted to upgrade the oil pump gears while the timing cover was off to a set of Billet Oil Pump Gears. With the timing cover off you can access the oil pump making it the opportune time to go ahead and address the fragile gears. The addition of this upgrade adds a few hours to the install but it is well worth it.

Here are some pictures from the tear down. You can see all four camshafts, phasers, and chains in place. Towards the bottom you can see the oil pump mounted on the crankshaft:
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Here is a view of the oil pump open and the gears exposed:
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We followed Comp Cams directions on installing the limiters closely. The installer has to make sure that the limiters are in their correct positions, if not the VCT will not be able to make proper adjustments or in extreme cases can cause valve damage. You will also need to purchase 12 replacement bolts for the cam phasers, the factory pieces are torque to yield and therefore cannot be reused. You can purchase them here from the PBH products page.

Once the cams were installed and torqued down, we moved onto placing the chains back in place. By this time, the oil pump was re-installed with the new gears inside. We re-installed the timing cover, valve covers, Harmonic balancer, and all accessories that were removed during the installation.

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Now with the car re-assembled, we moved on to the tuning phase. Lund Racing was on site to tune the Boss and get max power out of these Max Effort cams.

Ready for the dyno:
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Once on the dyno, Ken Bjonnes of Lund Racing applied his expertise to find 50 additional RWHP and 30 RWTQ. The idle quality with the new cams is not as rough as expected so a “cammed” tune was applied to get the cam note requested. With the Max effort camshafts in place, Limiters, oil pump gears, JLT Cold air kit, off road x-pipe, and Lund Racing tune we found substantial gains in both HP and Torque. At some points of the graph, we have more than 50rwhp separations. Peak power was made at 7200rpm and did not drop off from there. Peak torque was made at 5500rpm.

Here is a view of the graph with baseline run in blue and camshaft run in red:

With the addition of long tube headers and higher octane fuel(E85 or MS109) we believe performance would come in close to 500rwhp Naturally Aspirated. Results will vary between the GT and Boss power plants, but these cams are the way to go for NA Power.


We recently got the chance to re-tune the Boss after the addition of long tube headers. This combination now puts down 470rwhp! We are looking forward to the addition of the new Cobra Jet intake manifold with Ford Racing throttle body to push this Boss past 500rwhp. More news on that in the near future.