Pros
For months, MotorDyne Engineering has had the 350Z community buzzing with the release of their MREV2 lower collector. At first glance, both the MREV2 lower intake and factory "REVUP" units look identical, but if you take a closer look; you'd be surprised at the difference in design. Nissan increased the power output by 10 more horsepower on the '06 and newer "REVUP"engines by eliminating the air flow restrictions found on the front runner banks and by shortening the length of the runners, which proved to be a big sacrifice.
The newly engineered manifold killed the torque and lowered the torque curve throughout the powerband. "This didn't make sense because why would Nissan sacrifice all that midrange and torque to gain 10hp? Why not take the older designed plenum (287) and use a spacer to make up for the loss? If I could modify the stock 287 plenum by milling, porting, and reshaping the factory runners on the 287, the newer Z's can theoretically increase peak horsepower but maintain the torque and midrange," states MotorDyne Owner and Engineer Tony Colette.
Cons
MotorDyne includes detailed instructions on how to remove and install the factory components while stressing the importance of correct torque specifications for each of the bolts. If you're not mechanically inclined we highly recommend you pay those extra dollars and have a skilled mechanic install the products.
Parts
MREV2 lower collector manifold, isothermal Aramid manifold gasket
Tools
4-, 8-, 10- and 17mm socket, ratchet, extension, adjustable crescent wrench, screwdriver, needle nose pliers, allen wrenches and a torque wrench.
Installation time 80 minutes.
Notes
While peak horsepower gains are minimal, you will notice how the graph has shifted to the left in comparison to the original baseline run. This shift creates more usable horsepower throughout the VQ's rpm range. At 4500rpm, we see a significant gain in midrange power, with the largest recorded at 18 hp. Horsepower gains are once again dominant at 5800rpm with an increase of 16 hp over baseline.
If horsepower numbers are enough to impress you, the torque gains will leave you breathless. At 3200rpm, an increase of 13 lb-ft of torque was graphed, while the largest gain was noticed at the 4500rpm sweet spot, netting an increase of 21lb-ft of torque. The gains continued throughout the dyno as a gain of 11lb-ft of torque was delivered at 5500rpm. You might notice a slight drop in HP and torque numbers as the Roadster's VQ engine nears redline, but in all honesty...which would you rather prefer: usable bottom end-to-midrange power and torque, or a few horsepower gains near fuel cutoff? Exactly our point.
Dyno 2: MREV2 Lower Collector
PEAKHP 232.8 / PEAKTQ 226.8
Horsepwer Gain
1500 to 3500 HP range: 0 to 5
3500 to 5500 HP range: 7 to 18
5500 to redline HP range: 11 to -11
Torque Gain
1500 to 3500 TQ range: 0 to 13
3500 to 5500 TQ range: 5 to 21
5500 to redline TQ range: 11 to -6
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