At the time of its debut the Infiniti G35’s refined styling and sporty performance made a loud statement.  Among other items, the G35 shared its VQ35DE engine with the 350Z and was a legitimate performer on the street and track.  We had the opportunity to test the NonStopTuning Underdrive Pulley Kit on one of these cars and were pretty impressed by the results.  Jessica’s G35 came to us as a completely stock car and provided us with a perfect blank canvas for testing.

All before and after dynos were performed on the Carboy Racing Dynojet in Houston, Texas. Before and after dynos were performed on the same day, with pulley install in between, with NO other modifications of any kind. Dyno graphs and max values are listed, temps and humidity are also listed. All photos were taken during this testing session.

Using a car with NO other performance modifications gives us a blank canvas and makes it abundantly clear that the gains we see are associated with the NST Pulley Kit.  Our test car did better in terms of horsepower, torque, and response, as indicated by the upward shift in both the HP and TQ curves.   Better horsepower and torque delivery is clearly visible in the low, mid, and high range of the power band.

Max horsepower went from 227 to 232, with a very nice shift in the mid range, posting consistent 10+ horsepower gains in the middle of the powerband.  Max torque was more impressive with an increase from 220 to 232, delivering these gains pretty consistently across the entire power band.

Conclusion?  NST Pulleys improve power, torque, and response across the entire power band. If you look at the area under the power and torque curves you will notice positive gains in the low, mid, and high range when the NST Pulley Kit is used. No other modification in the same price range can offer similar gains across the entire power band. This fact makes the NST Pulley Kit one of the best bang per buck performance modifications for the Infiniti G35 and Nissan 350Z.

​NST – NonStopTuning
www.NonStopTuning.com

Are lightweight pulleys hard to install? How long does the average install process take? How much should I expect my mechanic to charge me for installing my new pulleys?  Are belts expensive?  These are some of the most common questions we hear from our customers.  Check out the latest video on our YouTube channel for a great DIY guide and read on for more answers, below. 

FAQ: Are lightweight pulleys hard to install?
ANSWER: Most NST pulley kits can be installed in about an hour, check out our DIY video for a pretty good walk through and consult your owner's manual for torque specs and other info.

FAQ: I can't do my own installation, how much should I expect my mechanic to charge me?
ANSWER: Most mechanics should be able to install your pulleys in about an hour, most mechanics charge $70 to $100 per hour in labor fees.

FAQ: Are belts expensive?
ANSWER: Most belts range in price from $10 to $30 and can be purchased on the NST website or at your local auto parts stores. Quality belts should last 36,000 miles or more.

Why are NonStopTuning pulleys a popular choice for many of our customers?

Crank pulleys, attached to the outside of the crankshaft, are the source of power for a car’s accessories. The alternator, power steering, water pump, and air conditioner are all belt driven units, attached to the crank pulley, that use horsepower from an engine to provide their own services. Underdrive pulley systems increase an engine’s horsepower by reducing the power required to drive the external engine accessories. By replacing factory pulleys with carefully resized units, the accessories are slowed enough so that their performance does not suffer, but just enough so that more horsepower is sent to the wheels and put to the ground, where horsepower should be.

NST pulleys often increase engine output by 7 to 12 horsepower, with even better power levels yielded from turbo models than seen in naturally aspirated engines. This increase results in quarter-mile time and road course lap improvements, easily making this modification one of the best “bang for your buck” modifications for any car or truck.

Another great benefit in replacing factory pulleys with NST units is reduced weight. Factory units, also referred to as OEM, are generally constructed from steel or cast iron. NST pulleys are constructed of aircraft quality aluminum, making them extremely durable while at the same time much lighter than their steel/iron counterparts. This weight reduction (approximately 70%) results in less rotating mass on the engine’s crankshaft which drastically increases the engine’s ability to rev to speed faster.
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Better throttle response, better horsepower and torque delivery, and better fuel economy can all be had when using NST pulleys.

NST - NonStopTuning
​www.NonStopTuning

We get this question a lot, "I want an oil cooler kit, but they seem complicated. Are they hard to install?"  No, they are not very complicated, and you should be able to handle your own install if you have a little experience with wrenching on your car. 

We even decided to offer up a simple video to help you get started.  Follow along as our friend Brad, aka OKBRZ, walks you through the install process on his Subaru BRZ. 

Ready for your own Oil Cooler Kit?  We offer both standard sandwich plate oil cooler kits and remote oil cooler kits, at very reasonable prices, and ship them to any destination free of charge.  Below are just a few examples...
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Have questions?  Need a custom cooler in a different size?  Just email us and we'll do our best to help you with your project!

​NST - NonStopTuning
www.NonStopTuning.com

Q. Do lightweight aluminum crank pulleys lead to premature engine failure?
Most American V8 engines of the muscle car era (50s-60s) were externally balanced.  An external (harmonic/vibration) balancer was attached to the outside of the engine on the crank snout. The crank pulley in such engines was a separate piece attached to this balancer and the removal of this balancer was a bad idea. External balancers were most often used on large displacement V8 engines and the majority of today’s internet forums and social media discussions regarding harmonics stem from this principle.

Modern (1980s and up) Honda, Toyota, Nissan, or other Japanese engines are NOT equipped with external balancers. These engines are internally balanced and this process has improved even further since the 90s. So the topic of a BALANCER does not apply here.
The crank pulley found on many modern engines is often called a harmonic damper. The damper is a thin rubber band, approximately (1/8 inch) 2mm, built into the crank pulley. This rubber is used to absorb something called NVH, noise/vibration/harshness. Suffice it to say, this rubber is actually not very good at performing its intended purpose after as little as a few thousand miles. What happens to rubber after exposure to weather conditions such as humidity, rain, snow? It often becomes brittle, hard, and crunchy. Can something with such properties absorb vibrations? Not very well.
NST customers often report smoother running engines after installing NST pulleys, especially at idle. How is this possible if the rubber is such a vital piece? As it turns out, the rubber is not as important as it's cracked up to be.

On a well maintained engine with bolt-ons or low amounts of boost like what most owners probably run, a lightweight aluminum crank pulley will not have any life threatening consequences. The engineering reasons are that most modern engines have a short (increasingly strong) crankshaft operating under 8,000 RPM. The dangerous second harmonic that can cause damage occurs at an RPM that this sort of engine will never see, in the area around 10,000 RPM. Even the OEM damper is not tuned for attenuation above 10,000 RPM, so the argument is somewhat of a moot point.  The great majority of our customers do not fall into the latter category. 
​How many 500+ HP, 10,000+ RPM engines do we have on the street? Not many.

Q.  Does NST have cars/customers in professional motorsports using its products?
NST has campaigned several pro cars in the professional drift series, Fromula Drift. Our cars have also competed in D1 GP USA, Xtreme Drift Circuit, and the NOPI Drift series.
​A large number of Honda, Toyota, and Nissan tuners use underdrive crank pulleys in road racing series like NASA or SCCA. Road racing is often more punishing on an engine than other motorsports. The engine is subjected to run times lasting apx 30 minutes with the engine often in the upper ranges of its RPM limit. One race weekend is the equivalent of hundreds of quarter mile passes. These tuners would not use NST pulleys if they were not reliable. NST sponsored the first ever wheel to wheel Scion tC NASA Road Race car. The same car was very competitive in the Grand Am series and had factory backing from Toyota, Scion, and TRD. This car used pulleys from NST with great results since day one.
Furthermore, NST products are also used in autocross, time attack, hill climb, and drag racing series.

SUMMARY ON VIBRATIONS, HARMONICS, SAFETY
Older American V8 engines are externally balanced and require pulleys designed specifically for those applications, or damage to the engine could result. You will not find solid aluminum NST pulleys on our website for such engines.
Modern Honda, Toyota, Nissan, and other similar engines are NOT equipped with external balancers. These engines are internally balanced and this process has improved even further since the 1990s. So the topic of a BALANCER does not apply here.
High RPM engines, when modified well beyond the simple bolt-on stages, may have issues with solid aluminum pulleys. Such engines reach critical harmonics above 10,000 RPM, a range in which the dangerous wave of harmonics can come into play.  For such RACE engines, OEM dampers are also not sufficient.
The overwhelming majority of our customers’ engines do not fall into the above categories, and as a result, will actually benefit from the lightweight pulleys NST offers. These engines will not suffer damages in street and/or track use when NST products are installed properly.

​We're confident every “expert” preaching otherwise has little personal, practical, real world experience with the subject; as it applies in your case.

NST - NonStopTuning
​www.NonStopTuning.com