At Z Car Garage we specialize in performance modifications and tuning for the Nissan/Infiniti sports cars. Dyno tuning with UPREV or EcuTek software can maximize power gains from individual modifications like intake/exhaust upgrades. Josh M visited Z Car Garage for a dyno tuning session on his Nissan 350Z following an engine swap and we were happy to help him.  Let’s hear about his Z-car story…

Josh’s 350Z V.2

 

“I bought my car back in 2007 after graduating high school. I first heard about the shop shortly after I joined my350z.com back in 2008. After a few years and acquiring a full set of Motordyne bolt ons I finally called up the shop and met with Rob in 2013 to get it tuned. He wisely advised against it with how much oil I was consuming back then and suggested I come back with a fresh motor or rebuild (I’m thankful for his honesty and integrity).”

 

“Last year when that motor finally gave up around 200k it was time to swap all my mods to a new engine and call Rob for a dyno tuning session. My car made great power and surpassed my own expectations when it made 288whp and 274wtq on this swap from an ’04 G35. It’s always felt like a strong DE with a solid powerband and the dyno tune proved it. My main goal for the car is overall balance between drivability on the streets and performance on the track, and using our beautiful Santa Cruz mountain roads as testing grounds has helped me kind of find that happy spot.”

  

“As far as the exterior, a mix of KH3 super black and seibon carbon keeps it stealthy but also distinguished in the right light. I’m serious about the overall balance thing and reducing this 2 seater cars weight is a top priority, currently sitting at ~3100lbs and ideally want to be under 3k lbs.”

Dyno Tuning at Z Car Garage

 

A typical dyno session begins with a road test and full inspection before hitting the roller. We found a failed inlet hose and loose plenum bolts so we tightened everything up to ensure a successful dyno pass.

 

We dyno tuned the Z with UPREV and ARC license. Z Car Garage offers this ARC (Advanced Racing Controls) license add-on service to the existing UPREV Flash, allowing adjustable launch control, burnout mode, and flat-foot shifting for $150. This is for cars with manual transmission, VDC/cruise control. Call Rob for more details! Josh’s Z made 288hp/272tq to the wheels, a significant gain over baseline of 274hp/261tq:

 

Turn up the volume and enjoy this video of Josh’s 350Z on the dyno. Thanks for your support Josh and LONG LIVE THE Z!

Interested in dyno tuning your Nissan/Infiniti sports car? Contact Rob at the shop for more information and scheduling 408-452-0350 or e-mail Rob: robATzcargarage.com

 

Dan F is long time customer of Z Car Garage and we started working with him shortly after he acquired his Nissan 350z. Dan comes from a family of motorsports enthusiasts with his Dad (C6 Corvette) and brothers all enjoying track time together:

 

In 2012 we installed a Vortech Supercharger and for the next five years Dan regularly tracked this Z33. We fought with oil/water temperature and anything you can think of battling while at the track. Where there was an issue, a solution was devised so he could beat on this Z for 20-30minute sessions easily.

Better, Stronger and Faster

In 2017 with 53k miles on the odometer the factory engine failed in Turn 1 at Laguna Seca. We were at a crossroads: with all the developments we made so Dan’s Z could handle routine track duty should we push the envelope by adding even more power?

 

The answer, invariably was YES. At the heart of the new build was a Rebello VQ with HR top end and internals including forged pistons and rods, HR head gaskets and headbolts, race bearings, factory compression ratio, JWT C8 cams and JWT HD valve springs:

 

The major power added was a new Vortech Si wheel offering more hp per pound of boost. Supporting mods included DC sports carb legal headers, EV14 1000c injectors, GT MAF and upgraded fuel pump. Keeping things cool are new oil coolers and a revised ZCG cold-air intake:

   

The front-mount intercooler was upgraded to an ATP Garrett 900hp unit:

 

To monitor intercooler efficiency a gauge was installed in the factory cubicle displaying temperature before and after the IC:

 

A few more pics of Dan’s interior:

  

Dyno Tuning

 

With the engine bay all buttoned up Rob dyno tuned the Z using UPREV. The Z is now making 480hp/390tq at the wheels on a conservative track tune to keep heat low. The dyno plots show the previous 91 octane tune (368hp/333tq) and newest 91 octane tune (455hp/365tq):

 

More Track Mods

 

An off at Thunderhill gave Dan an opportunity re-engineered his aero pieces. He rebuilt the front splitter, added side blades, rear diffuser and front fender slats:

 “For the brake ducts I repurposed old Roush Nascar ducts in dry carbon with standard ducting. The front splitter with spats I made to attach to the Stillen piece. The spats are tied in up the fender to prevent turbulence with the tire as it’s running a 295 front with -3.6 degrees camber.”

 

“Rob has been part of the heart and soul of this car as he has helped me build it over the last 10 years. It has been a guinea pig at times to try new methods but he has been a great partner and sponsor through all of it. It’s very fast and very fun being quite easy to handle at the limit. It is maintained for track duty at ZCG.”

 

Here is a video of Dan autocrossing and running the Z at Laguna Seca, there is even a snip from Larry Chen’s Hoonigan Autofocus :):

 

Our shared excitement is seeing Dan making personal bests at the track.  Dan is fast and here are a few notable times and achivements at his favorite tracks, we are proud of him!

“I’m still looking for time to break 1:40 at Laguna Seca, currently at….140.7 and 123.7 at Thunder Hill West. I’ve consistently run in the top 10 of 100 with Santa Clara Corvette Club AX’s”

 

  

We have even seen Dan on the street at the local 2018 ZONC Annual Car Show and cruising twisty Bay Area roads near Alice’s restaurant:

 

Thanks for supporting Z Car Garage and letting us build your track car Dan. We look forward to seeing you enjoy track events. Long Live The Z!

More pictures in the gallery below!

 

 

 

 

At Z Car Garage we enjoy working with late-model Nissans as much as earlier Datsuns. Our customer Eric R brought his Infiniti G35 Coupe to us back in 2009 and ten years later we helped him find a 2008 Infiniti FX35.  The FX got many upgrades to make it exactly the way Eric envisioned and he’s been enjoying it with his family as well as backroads.

 

The first generation (S50) FX-series models have aged rather well and we dig their combination of styling, power and versatility. Eric recalls how he became an FX owner:

“I’ve always been a car enthusiast.  My mom owned a 72 240Z back in the day and in 2007 my wife and I purchased a G35 Coupe 6MT and after a disappointing experience with the local Infiniti dealer, took the car to Rob and ZCG.  Needless to say, the knowledge base and Rob’s unique brand of engagement with his customers was refreshing. It was one of the best customer service experiences I’ve had and ZCG took exceptional care of our G35.  After a couple years of ownership, we had to give up the G Coupe with the onset of…kids.

Fast forward nearly a dozen years and the kids a bit older, I started my search for a new car. It needed to be sporty but still functional as a daily driver. It needed to haul mail and still haul the kids and the bikes and the gear.  The FX covered nearly every one of my criteria in one package, but fell a little short in visual cues and base line performance.

Timing worked out as our customer Chris’2008 FX35 AWD (Sport & Tech pac) was up for sale:

“As I searched for potential candidates, I was thrilled to reconnect with Rob and ZCG.  He helped me focus my search efforts and game plan what I envisioned for the car.   After a year of searching my FX came up for sale.  As luck would have it, it was a car already under the care of ZCG and a number of mods on my want list performed. Rob confirmed the quality and condition of the FX as well as the character of the seller.  It was, as they say, meant to be.”

 

 

Eric’s first visit with his FX focused on power and chassis upgrades. The VQ35 was treated to a Motordyne plenum spacer, JWT POP Charger and Uprev street tune providing more power throughout the rev range.

 

Eric is all smiles with the upgrades and he’s been driving the FX everywhere:

 

We were able to do a small amount of testing with the new Cosworth plenum at the end of the day on friday and we were showing some nice gains.  Now we are back on the dyno and will be swapping the plenum around to a few cars to see how it performs with different modifications.

Cars to be tested today:

2003 350z: Stock engine, aftermarket cams,  APS Twin Turbo

2005 G35:  Built Engine and APS Twin Turbo

2003 G35:  Stock engine, JWT cams, APS Twin Turbo (ZCG G35)

2005 350z: Stock engine, Vortech supercharger

Testing later this week:

2005 G35: Stock engine, JWT Twin Turbo

All of these cars have other modifications (exhaust, cams, etc.) that will be gone over when I post the full Cosworth report here on ZCarBlog.com.  More good things are coming friends…. Happy Monday