VQ37VHR Supercharger install

This story like all great stories started with a plan.  Then that plan got wadded up and thrown in the garbage but you’ll see what we mean by the end.  Our initial plan was to start out getting a baseline dyno run over at the Dsport shop as shown.  We’d get baseline power numbers and then procedd with our VQ37VHR Supercharger install.  We’d install our parts and then head back to Dsport to see what kind of power we’d make.

Baseline power was decent at 301 whp.  Less that what we’ve seen on other dynojets but respectable for a basic bolt on VQ37VHR.  With our baseline set we headed over to the MotoIQ garage.

Fueling the Supercharger

After months of collecting and waiting for parts and years of planning we’re finally ready to install our supercharger on our G37S Sedan.  You can read our other articles on our Project G37 as well as the other articles in this series including Vortech V3 SI supercharger and our fueling system from CJ Motorsports and our Air to Air intercooler components from Soho Motorsports.  Let’s get started.

By far the fueling system change was the most involved so we got started with that first.  Howard begins by removing the fuel pump assembly.
We disconnect the electrical connections
Digging further into the system the fuel filter housing on the right is separated from the fuel assembly housing on the left. Among the things included are the Venturi components the stock fuel pressure regulator and the fuel pump itself.
We cut away the top section of the fuel filter housing to access the factory fuel filter. The top part of the plastic housing is removed and the filter contents are removed as we’re converting the fuel system over to use an external fuel filter.
Howard doesn’t mess around and sometimes we miss some steps. Here he already has our Aeromotive Stealth 340 fuel pump added and is heat shrinking the electrical connections.


  1. Will the O2 sensors provide a useful measurement for tuning purposes being so far out of the exhaust stream?

      1. Oh, I didn’t realize those were the secondary oxygen sensors. Makes sense. Thanks for the clarification.

    1. Depending on your tuner and the type of ECU you’re using (UpRev/Ecutek) and what kind of tune you need your tuner can use information from the MAF’s for tuning. Since the fueling system was dramatically upgraded, we added forced induction and we went with the Air to Air intercooler a wideband O2 gave our tuner a precise measurement of the air/fuel ratio. Apparently there’s a lot of turbulence in the intake pipe with forced induction which skewes the air/fuel reading from the MAF’s

      Apologies for not taking a picture of the O2 sensor wired up for tuning with the wide band O2 sensor into the test pipe. It was one of those things missed in a hectic day. You were right and you did see just the factory O2 sensors.

  2. Loving this project. I have a G37s 6M sedan and would love more power. My brother had a G35 sedan and after I beat him, he went and got a Q50 redsport off Copart for 12k with 215 miles. While I love the power of the Q50, I hate the automatic transmission. Can you give an estimate of how much this project will cost? I know the kit is about 5k.

  3. The Air to Air kit from Soho with the Vortech supercharger is $6,500.


    Then there’s the fueling that we sourced from CJ Motorsports. Off memory I think that was under $2k.


    In total I think everything was right around $10k.

    I know what you mean about the stock automatic transmission. When we first had UpRev tune the car before the supercharger the increased line pressure they achieved really improved the transmission shifting. I’ve read similar improvements with the Ecutek ECU that we now have. We took things a step further and went with a level 10 transmission. It just grips and rips.

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