Henry’s Stillen Supercharged 370Z

Filed under: 370z,Featured Cars and Projects,Performance
by Alvin G @ 5:10 pm on April 16, 2021

We met Henry L in 2019 when he brought his 370Z in to Z Car Garage for bolt-ons and eventual forced-induction. Henry is a fellow gearhead with an Alfa Romeo 4C spider but his passion for the Z started at an early age:

“My first dream car was 350Z. I learned about Z cars in my college days and I recall a cool kid driving one while I was waiting at a bus stop in the cold rain. We had an opportunity to buy a new car and I was very fortunate that it could be a Z. After purchasing the 370Z, 6 months later went to ZCG and the journey began. No offense to stock Zs but these are meant to be modified 🙂 My wife and I both love our Z and I thank her for supporting my hobby 🙂 “

Bolt-on Beginnings

With only a few months of owner-hip of his new 370s Sport Touring Henry visited us for upgrades. The latest Z34s had ECU changes and no software support at the time. Henry knew he wanted to go forced-induction so in the interim we started bolt-on upgrades. In April of 2019 the chassis was treated to full KWV3 coil-over suspension with SPC F/R control arms and Hotchkis sway bars:

A few installation pictures, followed by a full alignment:

A cat-back exhaust system from Armytrix with Valvetronic sound adjustment:

Henry requested a new steering wheel install:

Stock (with a cover) removed and new carbon fiber + alcantara-trimmed wheel installed:

Time For Boost

With 12k miles on the odometer Henry was ready for boost. We ordered the Stillen supercharger kit (black), CARB-legal for piece of mind. Supporting parts included a Concept Z 25-row oil cooler (thermostatically controlled), Stillen transmission cooler and fueling upgrades. Here a few pictures of the installation:

Fueling upgrades include a CJ Motorsports stage 1 fuel return system and billet fuel pump hat, 1300cc Injector Dynamics injectors, Hellcat Wallbro fuel pump, SpecialtyZ flex fuel kit:

The SpecialtyZ flex-fuel kit comes with a Zeitronix gauge that we mounted in pace of the OEM clock:

Cooling upgrades include Soho Motorsports air-to-air intercooler, Concept Z 25-row oil cooler (thermostatically controlled) and Stillen transmission cooler. Also shown is the Fast Intentions crash bar with tow-hook:

Oil and transmission coolers:

We installed a Fast Intentions billet flex-plate, much stronger than the OEM unit:

Finally, we changed the exhaust from Armytrix to an ARK Grip setup paired with ART Pipes from Motordyne:

Henry loves the current exhaust setup:

“I’ve gone through Nismo OEM, Armytrix, and eventually settled with Rob and a friend of mine’s suggestion for the forced induction route: Ark grip catback system + Motordyne art pipes = the deep growl without screaming. Sort of the centered idea of the goals of my Z project – subtle power without drawing attention.”

Dyno Tuning

We wanted the most efficent blower wheel to run ethanol so the V3 SI blower wheel was installed. Ecutek software was used for tuning, MAP-based with omni sensor.

Shown below are dyno graphs from when Henry was NA to 91 octane and E75 tunes on the Vortech. NA, the Z made 316hp/252tq and a 91 octane tune supercharged yielded 501hp/370tq at the wheels:

Rob then tuned the Z on E75 for 573hp/426tq at the wheels:

Enjoy the dyno tuning video!

We are very happy with the results and even more stoked to hear Henry’s feedback on the supercharger and tuning performance:

“The supercharger is very daily usable and power whenever I want! The sc mods put together and tuned by Rob for a 7at Z is able to reach 570+ whp and 430 wtrq and still feel smooth and dramatic at the same time is absolutely beyond my expectation (I followed every ZCG 370Z blog posts and it’s a honor to be one of the highest power 370Z from ZCG, hats off to Rob) And did I mention daily-driveable? Good surprise for me. In addition, Rob has been really patient and knowledgeable for all my questions and requests and late night text regarding my Z. It really felt like we built the car together but it’s all his magic touches! I really appreciate the journey! More to come”

Wheels Make the Car

We have said it before: wheels make or break a car. After long discussions with Henry we decided on the Ray’s TE37 Ultra Track Edition II. Finished in Blast Black and sized 19×9.5/10.5 these wheels look perfect on the Z34.

We love the little details Ray’s applied:

Enjoy The Boost!

Henry has been Enjoying The Ride in his supercharged 370Z.

“I love my Z and ZCG! Long live the Z! ZCG has been the place to go if you love Z cars, new or classic. Rob and the shop/crew exude passion for Z cars and you immediately know they will take care of your Z and your Z will be among its family. Rob has been great through the journey and worked with “our” Z. I am sure there is more to come for my Z with ZCG!”

You can follow Henry here on Instagram. What’s next for his Z? He’s playing with idea of a body kit but trying to maintain that subtle-aesthetic approach in his build. Stay tuned! Thank you Henry for letting us build your Z. It’s very cool for us as a shop trying to make 50-old cars keep with cars like this. We enjoy playing with the new stuff just as much as the classics. LONG LIVE THE Z! More pictures in the gallery below: