Stu’s 370Z Dyno Tune

Stu brought down his 2009 Z34 for some tuning.  He has the Cobb Post MAF Silicone Tubes, drop in K&Ns, and Fast Intentions Catback.

Blue was his baseline and red was after some tuning.  Even with these basic mods his A\F was very lean to begin with.

Z32- GT2860RS Mild Street Build

Another mild street build we did earlier this year.

  • Factory Nissan Longblock
  • JWT Sport 700 Turbos (GT2860RS)
  • MS Manifolds
  • SZ 3″ 5-Bolt Down Pipes
  • SZ 3″ to 2.5″ Hi-Flow Cats
  • B&B 2.5″ Catback
  • Nismo 740cc Injectors
  • Selin Dual POP Kit
  • CZP 2.5″ I\C Piping
  • ASH Massive SMICs
  • SZ Flywheel & SZ Max Street Clutch
  • Blitz i-Color Spec-R Boost Controller

456 whp & 418 torque on 91 Octane.  No data gathered on higher octane fuels since the owner has no plans for running higher octane fuel.

370Z TT…..the way it should be

Back in June I picked up a Z34 with intentions that if I bought one it would HAVE to be twin turbo’ed shortly thereafter.  When the new gen Z first came out I wasn’t completely sold on its looks.  I hoped at the least the engine and interior were further improved upon than the Z33.  As time progressed I began to liken the fish hook head lights, although the fangs on the bumper were still undesirable.  In any case, I had the burning desire to feel, drive, and interact with the new generation of Z car.  Having played with some at the shop I was pleasantly surprised as to how much better quality was up over the 350Z.  Handling is superb while retaining a very comfortable ride that doesn’t bring discomfort to  my body.  Having owned various high power Zs the added power of the new Z34 was a benefit, but I was spoiled.  This is why it just had to be turbo’ed.

Older brother Z32 gets to share his bedroom and share stories.  Looking at the rear of the Z34, the only thing I didn’t like was the rear fog light.  Painting the lower portion of the bumper black helped detract attention from it.

It’s almost a shame the front bumper has to hide such a beautiful kit produced by GTM.

The kit selected to power the Z is a high quality GTM Stage 2.  The turbos used are Garrett GT2860RS’ utilizing the .86 turbine housing and Tial external wastegates.  A GTM competition oil cooler was added to combat the already (factory) problematic oil temps.

Engine cover painted to match.

Since the car was to see some drag strip use we selected our flywheel and High 5 Clutch.

6 psi of boost (Boost Controller Off), good for over 400 whp.

9 psi for 488whp.

12 psi (100 octane) for 557 whp.  This is efficiency!  Less boost than a comparable Z32 and making more power for the given boost level.  The one thing lacking versus its older brother Z32 is the torque output.  The VG30DETT is good for matching HP & Torque values.

The blue run was the car BONE Stock compared to the red run force fed by 12 psi of boost from the GT2860RS’.

Power comes on very smoothly unlike a Z32 which can be violent.  Due to in part by the flat torque output.  It feels like the car could have come equipped force fed from the factory, its that good.  The VQ37VHR engine acts as if nothing were different with this amount of power running through its veins.  Something the old VQ35DE could not accomplish on a factory engine.  The bone stock VQ35DE could really only safely muster under 400whp.  Anymore and you risk certain catastrophe on the VQDE engine.

[http://www.youtube.com/watch?v=8MFxWUu6U3U]

On its first maiden voyage down the 1320 the Z and I (CAR #7293) were able to break into the 11s.  Prior to this it had been over 5 years since I last banged the gears down the track.  I can say this car is limited mainly by my driving and with some practice it should see low to mid 11 E.T.s.

Z32 NA Power

By far one of the highest NA Z32s we’ve seen.  John’s Z has lots done to it.  Something we’d like to see is a change of cams after looking at his power delivery.  It has regrind cams in it now.  To remedy some of this we installed a set of adjustable exhaust cam gears which gained more power and smoother power & torque delivery.  We also added a Selin Dual POP, fixed his VTC, and tuned it.  A before and after is shown below.  A list of some power mods John has are:

  • Factory 120+k Miles Engine
  • Stillen Headers
  • SZ Hi-Flow Cat Pipes
  • SZ Single Oval Catback
  • Regrind Cams
  • Tomei Adj Exhaust Cam Gears
  • SZ Flywheel & Sport Street Clutch
  • Electric Cooling Fans
  • Selin Dual POP & Translator
  • UD Underdrive Pulley
  • SZ Tuning

The red run was with a single POP filter untuned.  The blue run is with the Selin Kit, VTC fix, and tuning.  A peak gain of 10 whp & 12 torque.  The  most impressive gains to be found were at the mid-range (20 to 25 whp & torque).