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TruControl by STILLEN | Nissan and Infiniti

Apr 5, 2023

Nissan Z and Infiniti Q50/Q60 3.0t | TruControl by STILLEN Inline Power Module | VR30DDTT

STILLEN is excited to announce the TruControl by STILLEN Inline Power Module for the +2023 Nissan Z and the 2016-2023 Infiniti Q50/Q60 3.0t. The TruControl by STILLEN Inline Power Module is a quick and easy way to add more power to your Nissan Z, Infiniti Q50 and Infiniti Q60 featuring the V6 VR30DDTT engine. It makes great power from the factory and the TruControl by STILLEN Inline Power Module is a great way to add even more power for a low cost and simple installation.

We achieve this power by integrating the Power Module into the factory wiring harness and adjusting certain parameters to increase boost pressure and make significant power/torque gains across the entire power band. Installation only takes about 15 minutes and does not require any special tools.

Features and Benefits:

+70 flywheel Horsepower gain*
+86 ft. lbs. Torque gain at the wheels*
Very easy installation
Bluetooth integration
No wiring or specialty tools required
Easy removal

*Results may vary

TRUCONTROL BY STILLEN INLINE POWER MODULE

+2023 Nissan Z

TC101001

GET YOURS TODAY

2016-23 Infiniti Q50/Q60 3.0t

TC101002

GET YOURS TODAY

Nissan Z and Infiniti Q50/Q60 3.0t | TruControl by STILLEN Inline Power Module | VR30DDTT DYNO

The Numbers

From the factory the Z and Q50/Q60 3.0t is rated at 400 flywheel horsepower. On our dyno we saw a maximum wheel horsepower output of 336 horsepower at 6300 RPM*. This is about a 15% drivetrain loss*. Great work by NISSAN to get all of that power to the ground. After installing our Trucontrol piggyback ECU the dyno reported back a Max horsepower output of 392 wheel horsepower at 5390 RPM*. Simply by installing the Trucontrol ECU into our Z and Q50/Q60 3.0t we were able to gain more than 70 flywheel horsepower.

Even more amazing than the gains in horsepower are the gains in torque output. As you can see in the dyno the factory torque curve begins to decline at just over 3500 RPM*. At this RPM the stock car produced 338 ft. lbs of torque*. The Trucontrol by STILLEN is at 393 ft. lbs of torque*. Whereas the factory torque curve begins to decline, the STILLEN torque curve only increases further until reaching its maximum output at 4720 RPM*. At this point the factory output has declined to 323 ft. lbs*. while the TruControl by STILLEN has managed to increase to 409 ft. lbs of torque*. Truly amazing gains that make the Z and Q50/Q60 3.0t an absolutely incredible car to drive.

*Results may vary

Easy To Use

With the engine on or with the key on, you can go through and [-/+] select which calibration you want to run at any point in time. You can use the Tuning: Pro App which also controls and resets all calibrations based on what you input in the application.

The TruControl by STILLEN Inline Power Module comes preloaded with up to 7 different maps for your Toyota Tundra. These maps are going to range anywhere from Race mode to Sport mode to Eco mode.

NISSAN Z STILLEN CAT-BACK EXHAUST SYSTEM

STILLEN is excited to release the All-New “Street Series” Cat-Back Exhaust System for the 2023 Nissan Z. During the development of this exhaust system the STILLEN engineers went through multiple different exhaust configurations and prototypes. They determine what would provide the best performance, best flow, and best sound for the new Z.

2023 Nissan Z Test Drive | STILLEN

Jan 10, 2023

Kyle from STILLEN was able to test drive the new 2023 Nissan Z and he taught the Z was absolutely amazing. His done exactly what anybody with the keys to the new Z would do. He has taken the Nissan Z through a canyon road near his home and it was an absolute blast to drive.

It handles extremely well, just hugging every single turn. No tire squeal, no drama. It just soaks it up and it just goes. Point and shoot steering, you get on the throttle and the rear end starts to come around.

The Nissan Z has excellent power delivery from the VR30 V6 Twin Turbo 400 horsepower platform. It’s absolutely phenomenal to drive. You can definitely see the areas of enhancement that Nissan has made to the new Z.

STILLEN can’t wait to get there own Z and start to make some improvements. But again, these are improvements and modifications that are for the enthusiasts. They’re going to be for the enthusiasts who wants that extra power. The enthusiast that really wants to push it a little bit further and this car is going to respond so well to it. You can already tell that the new Z wants to go faster and wants to push harder.

From a styling perspective, Nissan has really hit a home run for the new Z. This is one of the best looking cars on the road. “I have to be honest, I didn’t love the original photos I saw. I didn’t think that the front end was really what I was looking for. As soon as I saw the Z in person for the first time, I knew I was wrong. The photos just don’t do it justice. This is a good looking car.” – Kyle.

The front end of the Z is designed to look like the older Datsun Z, similar to a 240 and a 260. Then you move around to the back of the Z and you get that 300ZX rear end immediately. The tail lights are a modern 300ZX tail lights, they’re absolutely fantastic. We can all agree that the rear tail lights are the best part of the design of the vehicle.

The katana down the roofline of the car is a very cool easter egg, but overall it’s just an amazing car. From a performance perspective, it handles incredibly well. You can tell that the power is there as soon as you put your foot down. It just scoots and gets going right away. This car wants to run, it wants to run hard, and you can already tell it’s going to be a lot of fun.

Steve Millen History

In 1989 our company founder, Steve Millen, started working with Nissan. Nissan hired Steve to be the lead driver for their new sports car program. They were bringing in the 300ZX at the time. They were going to bring in two race cars; number 75 and number 76. It was a twin turbo V6 VG30 based engine and they took those cars to dozens of race wins, dozens of pole positions, two world championships, wins in Asia, Europe and America.

Steve Millen & team with the No. 75 Nissan 300ZX & No. 76 Nissan 300ZX After Winning the 1994 24 Hours of Le Mans

To this day, I believe Steve Millen still holds the record of being the only driver to win the 24 hours of Daytona, the 12 hours of Sebring, and the 24 hours of Le Mans in the same year. They had a crazy amount of success with that 300ZX racing program.

Steve really translated that success on the track into STILLEN’s road car program. He also worked very closely with Nissan, refining the 300ZX and giving them more power and developing all these parts through STILLEN.

Towards the end of the 300ZX in 1995, Nissan celebrated his relationship with them as well as the culmination of the Z. They built a special limited edition SMZ 300ZX. It was a Steve Millen design 300ZX. This was a car that you could also buy through your local dealership. They only made a little over 100 cars in North America and these cars were sold through the dealer network.

2023 Nissan Z Test Drive | STILLEN SMZ 300ZX

The dealers would call up STILLEN, and they would place their order for the cars. All the SMZ packages were the same. It was just the color of the vehicle that was different. The SMZ package came with different wheels, brakes, body work, and a little bit more power through an intake and exhaust. I think there was a computer reprogram and some interior enhancements too.

The SMZ package was a 300ZX that you could buy from the dealership with the factory warranty. That’s the type of relationship STILLEN has with Nissan. Working with Z’s goes through our blood, all the way back to the late 80’s and early 90’s.

When the 350Z came out it was very much the same. We didn’t do a SMZ package, but we did a whole catalog of parts for the 350Z. That catalog of parts included exterior styling, sway bars, intakes, exhaust systems, oil coolers, transmission coolers, supercharger systems, you name it. At one point, STILLEN had about 30 different products for 350Z. That really speaks to the STILLEN’s philosophy when it comes to the Nissan Z’s. The relationship that STILLEN has with the Z is strong.

We don’t want to just do an intake or exhaust. A lot of the times when STILLEN brings other vehicles in for product development, that’s all we’re doing. We’re just doing an intake and an exhaust system, maybe a body kit.

On the Z’s we tackle the entire car. It becomes a passion project for STILLEN because of that relationship and that connection that STILLEN has to the Z and to Nissan. We really want to refine it as best we can. So we’ll go front to back, top to bottom.

The Z’s are so special to us that we just want to give them as much attention and as much love as we can. That basically comes out by all the parts and all the enhancements that we make for the Z’s.

2023 NISSAN Z

We continue to work and develop new parts for the 2023 Nissan Z. The new STILLEN products are nearing their completion. Make sure to have your social media notifications on to be the first to hear about the new products. Hopefully your as excited as we are to bring the new products for the 2023 Nissan Z.

The STILLEN’s 2017-2018 Infiniti Q60 3.0T Cat-Back Exhaust System

Feb 18, 2019

STILLEN’s 2017-2018 Infiniti Q60 3.0T Cat-Back Exhaust System!

STILLEN® released one of the most powerful cat-back exhaust system for the Infiniti Q60 3.0T. The twin turbo V6 VR30DDTT engine from Infiniti is a very exciting power plant that comes with a tremendous amount of potential and opportunity. STILLEN is excited to get to work tuning this baby GT-R platform!

To start with the development of this Cat-Back Exhaust System, STILLEN created multiple prototype systems. Ranging from true dual to X pipe to Y pipe with varying diameters of tube in each configuration. Having been in the business of developing high performance exhaust systems for more than three decades we have learned that there is no formula or cheat sheet for creating a performance exhaust system. The only way to find out what works best for an engine and vehicle configuration is to build and test.

Having developed a wide range of prototype exhaust systems our engineering team hit the dyno to see which configuration produced the best results. After all of the tests were completed, we were a little bit surprised to learn that the best exhaust system was lying in front of us the whole time. The twin turbo V6 Nissan GT-R favors a dual into single back to dual configuration and after our testing was complete we learned that the Infiniti Q60 VR30DDTT does too. This exhaust system features a 2.5” Y pipe which flows into a 3” mid-pipe. The 3” mid-pipe then carries the exhaust gases to the rear of the vehicle where it branches back into 2.5” dual rear exit.

Upon meeting the rear exhaust pipes the exhaust gases flow through the STILLEN engineered and manufactured mufflers. During our development, the STILLEN engineering team struggled to get the exhaust note “just right” with traditional off the shelf mufflers. This can be a common problem when working on a turbo engine as the turbo acts like a muffler and restricts the engines exhaust note. Our engineering team struggled to find the balance between too loud and too quiet until the decision was made to develop and manufacture our own muffler bespoke to the VR30DDTT platform. STILLEN has been manufacturing their own mufflers in house since 2002 with great success.

The end result of our teams tireless work is the most powerful cat-back exhaust for the Infiniti Q60 is available today. This system features 100% stainless steel construction, laser cut 304 stainless steel flanges, polished stainless steel mufflers and a selection of three different exhaust tips ranging from polished stainless steel, flame burnt torch series stainless steel, to polished stainless steel wrapped in dry carbon fiber. All of this backed by STILLEN’s limited lifetime warranty.

Product Features:

Greatest Incremental Horsepower Gain: 26.3 HP @ 4,680 RPM
Greatest Incremental Torque Gain: 29.5 lb-ft @ 4,680 RPM
100% Stainless Steel
Limited lifetime Warranty
American Made
Authoritative Tone Under Throttle
Most Powerful

Also Available:

Exterior Styling

Performance, Brakes, & Handling

If you have any questions about the Infiniti Q60 3.0tSTILLEN Cat-Back Exhaust Systems or any STILLEN products for the Infiniti Q60 on our website, give us a call at (866) 250-5542, email sales@stillen.com, or message us on our Live Chat!

Monochromatic Monster: Deryck G’s Infiniti Q60 RS with STILLEN Upgrades

Jun 27, 2018

STILLEN Front Splitter + Winglets / STILLEN Rear Diffuser
Vossen VSF2 20×9.5et25 / 20×10.5et25 with Yokohama ADVAN V105 245/35-20 / 275/30-20 on RS-R SuperDown Springs

Sporting the a smorgasboard of STILLEN Q60 mods, Deryck G’s 2017 Infiniti Q60 RS AWD is certainly a sight to behold. The Q60 is already a gorgeous vehicle, but the addition of STILLEN Aero and performance upgrades really makes this Infiniti Q60 RS especially slick. Starting with the ivory white exterior, Deryck has some great contrast going on between the matte black trim, aero and wheels against the crisp white of the body.

STILLEN Front Splitter + Winglets
Vossen VSF2 20×9.5et25 / 20×10.5et25 with Yokohama ADVAN V105 245/35-20 / 275/30-20 on RS-R SuperDown Springs

To give the Infiniti Q60RS the low slung stance a curvaceous coupe like it deserves, Deryck opted to drop the Q60 Suspension with a set of SuperDown Springs from RS-R. A more conservative option than a coilover, yet a better stance and better handling than stock. The blacked out grilles and fender trim really drives the theme home, creating a cohesive look – everything looks like it belongs, nothing jarring and out of place. It’s exquisite.

STILLEN Front Splitter + Winglets / STILLEN Intakes for Infiniti Q60 3.0tt

Bolstering the already impressive 400hp output of the Q60 RS VR30DDTT are a set of STILLEN Air Intakes, one feeding each bank of cylinders. While RedSport models don’t pick up near as much power as SilverSports with our intakes, response is sharper and the induction note is so much more satisfying. Featuring two high flow conical filters and custom-fabricated MAF tube sections mated to contoured high-temperature urethane heat shields.

STILLEN Intakes for Infiniti Q60 3.0tt

Whereas many competing aftermarket intake systems aren’t shielded at all, the ones that do are mostly using metal heat shields. Urethane offers superior thermal insulation, while metal is a thermal conductor and the heat shield itself will get hot, which can result in a heat-soaked condition on hot days. Well-insulated, closed-box or semi-sealed box intakes perform much more consistently in traffic and in hot weather, as it helps keep intake temperatures lower and more consistent. Some may argue that “intake temperature doesn’t matter because the intercooler will cool the aircharge anyway”, but that’s not true. The intercooler can get the air-charge colder if it starts with a colder incoming air-charge.

The TL;DR: is lower inlet air temperatures result in lower air charge temps at the throttle.

The interior is stock for the moment, but the color combination is stellar – and really, there isn’t much you can improve upon – it’s a nice place to be.

STILLEN Front Splitter + Winglets

The subtle aero and details add a splash of drama to the car’s somewhat sedate factory aesthetic – sleek and graceful yet aggressive, not unlike an F-22 Raptor fighter jet – whereas other combat aircraft that bristle with firepower have bulky hardpoints hanging off their wings and undercarriage, on the F-22, its impressive complement of missiles and such are stealthily tucked away for an extraordinarily clean profile in every regard – on radar, aesthetically and aerodynamically.

STILLEN Rear Diffuser / Armore Design Rear Carbon Fiber Duckbill Spoiler / Vibrant Exhaust for Q60

It’s all the smaller details that make the finished package look as good as it does. Dressing up the tail of the car is an Armore Design CF Duckbill spoiler, paired with the STILLEN rear diffuser. Polished oversized tips of a custom-fabricated Vibrant catback exhaust for Q60 fill out the openings in the rear fascia, framed by the STILLEN Rear Diffuser for Q60.

STILLEN Front Splitter + Winglets / STILLEN Rear Diffuser
Vossen VSF2 20×9.5et25 / 20×10.5et25 with Yokohama ADVAN V105 245/35-20 / 275/30-20 on RS-R SuperDown Springs

Somehow, this car just oozes charisma and manages to make the Q60’s already supple curves that much more enticing, and the play of light across each surface that much more beautiful.

STILLEN Front Splitter + Winglets

The trifecta of the matte black grille, the matte black STILLEN Q60 Front Splitter and STILLEN Q60 Winglets with the blacked out front grille works together brilliantly, pairing like a great red wine and artisan-made cheese.

STILLEN Front Splitter + Winglets / STILLEN Rear Diffuser
Vossen VSF2 20×9.5et25 / 20×10.5et25 with Yokohama ADVAN V105 245/35-20 / 275/30-20 on RS-R SuperDown Springs

There’s only so much we can say, because these photos do an excellent job speaking for themselves. Check out a few more incredible photos of this crisp-linen colored beauty.

STILLEN Rear Diffuser / Armore Design Rear Carbon Fiber Duckbill Spoiler / Vibrant Exhaust for Q60
Vossen VSF2 20×9.5et25 / 20×10.5et25 with Yokohama ADVAN V105 245/35-20 / 275/30-20 on RS-R SuperDown Springs

STILLEN Rear Diffuser / Armore Design Rear Carbon Fiber Duckbill Spoiler / Vibrant Exhaust for Q60

Giving the Q60 a unique exhaust note and even greater authority when you stomp the go pedal, the custom-fabricated Vibrant Performance Exhaust and Vibrant Performance High Performance downpipes wakes up the VR30DDTT like getting a bucket of water dumped on you while napping, offering snappier response and further enhanced horsepower and torque to all four wheels.

Deryck has put together an Infiniti Q60RS that’s sure to turn heads everywhere – this is the kind of car that gets the valet to park your car prominently in the front row, and with a tasteful suite of modifications, this is a package that looks, sounds and performs better than stock without any of the ‘racecar compromises’ that degrade the car’s streetability, making it an incredibly satisfying drive.

Thank you to Deryck for making STILLEN a part of his build; shoutout to Arthur Malczewski for shooting and sharing these incredible photos with us. Thank you for reading, we hope you enjoyed this feature!

Feeling inspired? Want your car to look like this? Give our team of experts a call at 1-866-250-5542 or shop online and even chat live with the team at STILLEN.com. Thanks for joining us, and for those interested, check out the full mod list below.

Photos By

Arthur Malczewski

Full Mod List

Exterior

Stillen Q60 Front Lip (Matte Black)
Stillen Q60 Front Winglets (Painted Matte Black)
Stillen Q60 Rear Diffuser (Matte Black)
Vossen VSF2 Wheels – 20×9.5F ET25 / 20×10.5R ET25
Yokohama Advan V105 Tires – 245 / 35-20 / 275 / 30-20”
Blacked out chrome grille, window trim, fog light, side gills, blacked out roof
Armore Design Rear Carbon Fiber Duckbill Q60 Trunk spoiler

Performance

Stillen High Flow Intakes for Q60 3.0TT
Custom-fabricated Vibrant Performance Cat-back Exhaust System
Custom-fabricated Vibrant Performance GESI Ultra High Converters Down-Pipes
(note: car/owner not in USA, USA E P A/A R B regulations do not apply.)

Suspension

RS-R Super Down Springs

STILLEN 2018-19 Infiniti Q50 Splitter & Diffuser Now Available!

May 29, 2018

STAND OUT FROM THE CROWD AND MAKE THE VALET STOP AND STARE!!

A VERITABLE CORNUCOPIA OF OPTIONS TAILORED SPECIFICALLY FOR YOUR ELEGANT SPORT SEDAN.

At STILLEN, as with all the performance vehicles we offer parts for, the goal with Infiniti Q50 was to enhance the car’s natural good looks, accentuating its curves and bodylines as well as increase power output and give it a more sporting exhaust note– all without taking away from the comfort or drivability of the car. We continued that work with our new line of performance offerings for the facelifted-for-2018 Infiniti Q50.

Power and Style are both on the menu here, but let’s start with the power and performance side of things.

For 2018, the Q now has the option of several variants of the VR30DDTT, a Turbocharged Inline 4 or the VQ37HR.

With 2018 fitment confirmed, we are proud to offer the STILLEN 2016-18 Infiniti Q50/Q60 3.0TT Intake System for the twin turbo V6 VR30DDTT.

Good for 17whp and 28wtq, these intakes are sure to make your twin turbo V6 much more responsive, and the extra oomph will give you the power you need to embarrass your jerk neighbor the next time you pull up to him at a red light.

Rounding out the power package, we’ve also confirmed the fitment of the STILLEN Catback Exhaust for 2016-2018 Infiniti Q50 / Q60 3.0TT. Available with your choice of Polished Tips, Burnt Tips or Carbon Fiber Tips, this exhaust system looks as good as it sounds – and with an astonishing 26whp / 29wtq gain, this exhaust system offers power, style and sound all in one package.

If the exhaust note doesn’t catch your passengers attention, that extra nearly 30 foot pounds of torque (remember, these are at-the-wheels numbers, not ‘at the crank’.) is sure to sink you and your passengers into your seats when you put your foot to the floor.

And of course, that brings us to style.

We’ve designed an all new urethane STILLEN Front Splitter for 2018 Infiniti Q50, custom fitted to the new 2018 front fascia. As with all our splitters, this offers a mild aerodynamic benefit as well as looking sharp. Available in Painted Matte Black finish (ready to install), or unfinished, ready for you to prep, prime and paint the color of your choice.

Pairing with the front splitter, we’ve also redesigned a new rear diffuser as well. Installed over the OEM rear splitter, the urethane STILLEN Diffuser for 2018 Infiniti Q50 accommodates both the OEM and STILLEN Q50 Exhaust system.

This diffuser dramatically spices up the rear end of your Q50 for a much more dynamic appearance. Also available painted matte black or Unfinished, this rear diffuser is the perfect compliment to any Q50 build.

Rounding out the package is the STILLEN Trunk Spoiler for 2014-18 Infiniti Q50 models. Designed with retaining the rear camera in mind, this custom trunk spoiler fits as if it was factory equipment, and fitment was confirmed through 2018 Q50 models. The STILLEN 2014-18 Infiniti Q50 Roof Spoiler is also available for added spice, and also fits through 2018.

Interested in getting any of the newest Q50 performance parts for your vehicle? Give us a call at (866) 250-5542, Chat Live at STILLEN.com, or come by the showroom any time during business hours.

Thanks for reading, see you next time!

STILLEN Product Announcement: STILLEN Short Ram Intake for 16+ Infiniti Q50 3.0T

Apr 22, 2017

STILLEN Short Ram Intake for the Turbocharged Infiniti Q50 Sport and Red Sport 3.0T

STILLEN Hi-Flow Intake w/ Dry Filter for 2016-2018 Infiniti Q50 + Q60 (402856DF)

Infiniti breathed some forced induction life into the Q50 Sport and Red Sport models with the inclusion of its all new, twin turbocharged VR30DDTT V6 engine. Conservatively rated from the factory with 300 horsepower (in the Sport) and 400 horsepower (in the Red Sport), these new “Q’s” make decent power off the showroom floor. However, like any turbocharged engine, reducing air flow restrictions allow a turbocharger to spool up more quickly while efficiently generating boost pressure. This translates into improved response, greater incremental gains and oftentimes, more peak power.

As a longtime specialist in the world of Nissan and Infiniti, STILLEN takes great pride in the engineering of its products. Having seen the performance potential in the new 3.0-liter twin-turbocharged V6, our engineers set out to develop an intake system that produced the greatest performance gains without triggering the dreaded “Check Engine Light” error or requiring a custom tune.

Unlike any other intake manufacturer, STILLEN’s longstanding relationship with Nissan helped to facilitate a genuine Nissan factory CONSULT diagnostics computer. Monitoring data channels that most in the aftermarket cannot, STILLEN engineers tested more than 20 different intake designs, evaluating numerous variables and noting the effects on specifics such as fuel trim, velocity and temperature, to name just a few. While the sheer number of prototypes might seem like overkill, the data collected enabled STILLEN to optimize the intake design for output and presentation.

INTAKE (As tested on a 2016 Q50 Sport)

Peak Power: 293.15 whp @ 5,331 RPM

Greatest Incremental Horsepower gain: 20.98 whp @ 3,244 RPM

Peak Torque: 289.87 lb-ft @ 5,300 RPM

Greatest Incremental Torque gain: 33.71 lb-ft @ 3,256 RPM

Ready to add horsepower to your Q50 Sport or Red Sport? Reach out to us at 866-250-5542, by email at sales@stillen.com or via live chat at stillen.com! Demand for this intake is unprecedented, so order yours Today!

Best Q50 Exhaust: STILLEN 2016 Infiniti Q50 3.0tt Cat Back Exhaust

Apr 12, 2017

Best Exhaust: STILLEN 2016 Infiniti Q50 Cat Back Exhaust

It’s no secret that turbocharged engines thrive when allowed to breathe. Naturally-aspirated engines rely on some back pressure to create a scavenging effect to help maintain exhaust gas velocity. By contrast, turbocharged engines and particularly, the turbocharger(s), function most efficiently when the exhaust offers the least amount of possible resistance.

When Infiniti released the Q50 and Q60 with its new twin-turbocharged VR30DDTT engine, a new chapter in the performance passenger car segment had begun. Drawing on its experience with the VR38 engine that powers the mighty GT-R, the sturdy and underrated VR30 engine relies on its twin Garrett turbochargers to generate boost pressure. When allowed to breathe, the turbochargers really come to life.

STILLEN’s recently developed Short Ram Intake System (402856) (402856DF) has already proven to help produce incremental gains of over 20 horsepower and 33 lb-ft torque to the wheels. Employing years of engineering and manufacturing experience, along with hours of testing on its in-house Dynojet Dynamometer, STILLEN proudly presents its Cat-back Exhaust System for the 2016+ Infiniti Q50 3.0T Silver Sport and Red Sport (p/n 504450, 504451, 504452).

In the quest for the greatest gains possible, STILLEN engineers worked tirelessly to optimize this exhaust system. After several design revisions and numerous prototypes, this Cat-back Exhaust improved output with a best incremental gain of 21.37 horsepower at 4,750RPM and 23.94 lb-ft torque at 4,780RPM.

The Best Exhaust: STILLEN 2016 Infiniti Q50 Cat Back Exhaust features T-304 stainless-steel construction for corrosion resistance and durability, along with slip fit connectivity for weight reduction. The 3-inch mid-pipe mates to the catalytic converter and splits into two 2.5-inch axle-back mufflers. The mufflers terminate in your choice of three different exhaust tip finishes, including carbon fiber (p/n 504450), stainless steel (p/n 504451) and burnt stainless steel (p/n 504452). The bolt-on exhaust tips enable you to adjust the tip position for a proper fit no matter what bumper or aero you choose to run at the back. You can also purchase the other tips separately in the case that you want to change up the look of your exhaust.

STILLEN proudly engineers and manufactures its products in the USA at its facilities in Southern California.

For more information or to place your order about the Best Exhaust: STILLEN 2016 Infiniti Q50 Cat Back Exhaust
Chat with us 866-250-5542
Email sales@stillen.com
or Live Chat at stillen.com!

TO INFINITI & BEYOND – ANALYZING THE VR30DDTT TURBOS

Dec 23, 2016

The VR30DDTT is an impressive motor. It is underrated from the factory as we have seen with dyno testing. The Hi-Output version is rated at 400 hp and 350 ft-lbs at the crank and the Low-Output version is rated at 300 hp and 300 ft-lbs at the crank. We have consistently seen ~375 whp and ~350 wtq from the Red Sport Q50’s and Q60’s and ~300 whp and ~290 wtq from the “300 hp” versions.

That being said, everyone is still excited to see what these motors can do. With factory forced induction there is often a ton of room for gains when you simply tune the car and crank the boost up. Now there is a lot to consider before assuming power gains by simply increasing boost and tuning. So strap on your thinking caps and prepare for the math!

The factory turbos on the VR30 are produced by Honeywell-Garrett. The model of the turbo is MGT14446LKSZ. We could talk technical specifications*, but in the end let us just say the turbos are small. What is more important is we have the turbo map for the MGT1446 turbo. This has allowed us to see what efficiency range the turbos are operating under stock boost, as well as the limits of the turbos when it comes to boost levels and power gains.

We can see the VR30 Red Sport (400) boost curve looks something like this. With this knowledge, we can run a series of calculations to see the efficiency of the turbos throughout the RPM range.

For everyone who would like to do the math themselves the basic formulas are as follows.
Cubic Feet/Min:

Corrected Air Flow (CAF) lbs/min:

Pressure Ratio (PR):

So for stock boost our table will look like this:
*we use 1.5 liters as displacement as only half the motor feeds each turbo.

Q50 Red Sport – Stock (14.5 PSI)

Utilizing the same formula and increasing boost, we made a graph then overlaid onto the Turbo Map. We included the Low-Output graph for reference as well.

You can see that even at stock boost (for the Red Sport) the turbos are off the efficiency island (below 60%) post 5750 RPM. So what happens as you move off the island? As turbo efficiency goes down you begin to generate more and more heat for the given boost pressure.

If you look at the stock dyno sheet, you can see where the horsepower curve begins to flatten out at around 5000 RPM. We have also seen with an aftermarket exhaust and secondary cat deletes the gains past the 5000 RPM area are far less significant. This can pretty much all be attributed to the turbos.

2017 Q50 Red Sport 3.0tt Stock Dyno Sheet

We went ahead and also did graphs of increased boost pressure following the factory curve up to max pressure. We assume the lower boost pressure below 4000 RPM is to keep the torque under control for driveability’s sake.

Looking at the chart, one can see that as you increase the maximum boost levels you move out of the efficiency island very quickly. At 17 PSI you move below 60% efficiency at 5500 RPM which is not much worse than stock. However, once we get into the 19 PSI Range you can see us leave efficiency by 5250 RPM. On top of that we are moving over 23.6 lbs/min (or 342 CFM) at 6250 RPM very far outside of the efficiency island. This puts a lot of stress on both the engine and turbos.

So aside from changing the turbos (which there are no upgrades available at this time), what can we do to safely increase power? We believe it is unwise to spin these turbos much past 17 psi in search of a lot more power (at least above 5000 RPM). So with a moderate increase in boost pressure, the name of the power game will be EFFICIENCY (yes I’m sure you’re tired of reading that word).

Restrictions:

With any factory setup, there are going to be restrictions. Some are cost related, some are emissions related, and some are Noise/Vibration/Harshness (NVH) related.

We already know the first restriction point lies in the intakes. Factory intake systems are the first point of emissions and sound control on a car. The STILLEN intakes have already shown impressive gains in the mid-range powerband. This makes sense as the highest efficiency range of the turbo at factory boost levels (and even elevated boost levels) will be in the 3250-5000 RPM range.

The factory exhaust system on the VR30 powered cars is definitely a bottleneck as well. We know the secondary catalytic converters narrow down to 1.5 inches (diameter) just before the cat-back. On top of that the factory cat-back exhaust is a mere 1.75 inches (diameter). Now removing the factory catalytic converters is frowned upon by the EPA, so we can’t recommend changing those out. However, a cat-back exhaust is perfectly legal and voids no warranties (which we are sure most of you know). On top of giving the Q50 & Q60 the exhaust note it deserves, the cat-back greatly increases the efficiency of the turbos by reducing back pressure. This reduction in back pressure reduces the resistance on the turbines and in turn allows them to spool faster and easier. This means for the same given turbine speed, you are able to create more boost (or the same boost) with less heat.

Cooling:

While heat is necessary for an engine to run properly, too much is definitely a bad thing. While on a naturally aspirated motor, a cooler intake charge can greatly improve performance. Forced induction doesn’t yeild as impressive of results. Why is this? The air pulled through the intakes enters the turbo which compresses the air. The compression of air causes an increase in air temperature (see Boyle’s Law and Charles’ Law) which is problematic for internal combustion engines. With most forced induction setups there is an intercooler (or aftercooler) which is located between the turbo and the lower intake manifold. Said intercooler can be either an Air-to-Air or Air-to-Water system. The VR30 uses a pair of Air-to-Water intercoolers. The heat exchanger for the intercoolers (how the heat is removed from the system) is located in front of the radiator behind the grille.

The Red Sport version of the Q50 and Q60 both come with two waterpumps (push-pull) to increase cooling for the intercoolers. This makes sense as the Red Sport boost levels create a lot more heat at higher RPM than the 300 hp version. Knowing that many people will be increasing the boost of both models, everyone could definitely benefit from more cooling. While the intercooler units themselves would be difficult to upgrade since space in the engine bay is quite limited, the heat exchanger up front has some room to grow. Increasing the size of the heat exchanger does two things: allows for more heat to be extracted from the hot fluid, and increases the volume of fluid which increases the overall thermal capacity of the system. While this isn’t the ultimate solution, it would make running higher boost levels (17-18 psi) safer as well as reducing potential heat soak after prolonged aggressive driving.

Tuning:

While there is still a lot of exploring to do when it comes to tuning, there are several things we can see just by looking at the turbo map and dyno sheets. Your biggest gains will all be in the mid-range (2500-5000 RPM) with the stock turbos.

Based on the turbo map, tuning to 18 PSI from 4000-5000 RPM puts you in a very ideal efficiency range for the turbos. Now dropping the boost after 5000 RPM is important as holding too much boost is not ideal for the motor or turbos, but also won’t gain much additional power. This fine tuning of boost pressure adjustment is made easier by the factory electronically controlled wastegate actuators.

While we are still waiting on the tuning companies we work with to release official software, we are confident it won’t be much longer. You can bet we are just as anxious to start tuning these cars as you are, but with any new platform the best products take a little time to develop.

Although we probably won’t be seeing any 600 whp Q50’s or Q60’s without bigger turbos, there is still a lot of potential even on the factory units. Needless to say, we are all working on more ways to make power with this platform. STILLEN is about to release our new intake system for the 3.0t Q50 & Q60 along with our Cat-Back Exhaust for the 3.0t Q50! Our engineering department has done a lot of work on these products and designed them with the factory setup in mind as well as future upgrades. Stay tuned (pun intended)!

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*From the information we could find from Garrett:
Compressor side: TRIM 55 – A/R 0.46
Turbine side: TRIM 76 – A/R 0.40
Cooling: Oil and Water

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