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The OS Giken DIFFerence: Eric’s 350z

Filed under: Featured Cars and Projects,Performance
by Alvin G @ 4:40 pm on July 8, 2017

 

Eric T hails from Benicia, CA and he is one of the key members of Inconceivable Racing along with our customers Matt M and Rasheed B. This is a group of enthusiasts that got into Z cars and are now obsessed with taking them to open track days and events like Shift Sector. What is really cool is that both Eric and his wife run their HR-powered 350z cars together at the track!

 

Here are the couple enjoy their Z cars at Laguna Seca. It is a small Z-car world and we have worked on Eric’s wife’s 350z Convertible because it was our man William’s!

 

Eric had been to several independent shops and wasn’t really happy.  Rasheed told him about ZCG and we met with Eric to help sort his Z.  After driving at Laguna Seca, he was frustrated with corner entry and exit speeds. This was a result of not putting power down effectively through the open differential on his Base-model Z. Our solution was to install the OS Giken limited-slip unit:

 

Here is the unit being installed with a 4.08 gear, all new bearings and seals.  We also added a NISMO Diff cover:

 

 
  
 

The diff all buttoned-up and installed on the car:

  
 

With the car up on the lift we noticed one of the bushings in rear subframe was leaking. The subframe was pulled and all bushings were replaced with with SPL solid bushings. The diff received Whiteline bushings:

    
 

The aftermarket exhaust system was rubbing on the rear chassis brace and had a rubber pad wedged in between as the solution from a previous shop. We fixed it:

 

The exhaust was also rubbing on the rear sway bar, where a heater hose complete with hose clamps was used as an isolator. We fixed this well:

 

Motordyne ART pipes were installed and the Z was retuned with UPREV:

 

On the dyno we found peak gains of 7hp/11tq for a final 303hp/265tq to the wheels. More importantly the gains can be seen throughout the rev range:

 

 

 

After we performed this work Eric attended a 2-day race event at ‘Seca for his birthday. He was super pumped with the Z and it performed well. He’s a ZCG believer. Enjoy the Ride, Eric!

 




EVENTS: 2017 Japanese Classic Car Show 9/23!

Filed under: Events,Featured Cars and Projects
by Alvin G @ 1:46 am on June 30, 2017

 

We are proud to be a sponsor of the 13th Annual 2017 Japanese Classic Car Show September 23! The JCCS is a J-Tin lover’s paradise and it keeps getting better every year. Take a look at the poster above and you might notice a familiar black Z car. This year our OS Giken TC24 powered 1971 Datsun 240z will be displayed as one of the featured show cars, from the press release:

 

“America’s Most Exotic 240z” does have a nice ring to it!  You can see the original article by Mike Garrett over at Speedhunters HERE.

Screen Shot 2016-02-09 at 5.10.15 PM
 

 

Z Car Garage will have its own booth at the show, so please stop by, check out the Z and say hello!

                    ***JCCS registration opens Saturday, July 1.***

 

Registration open tomorrow, July 1, so get those applications in and Z you at the show!

In case you missed it, our coverage of last year’s JCCS show is HERE and you can see a brief history of the TC24B1Z powered 240z below:

DSC02515
 

Over 30 years ago OS Giken created the first dual overhead cam (DOHC) 24-valve cylinder head for the Nissan L-series engine: The TC24-B1Z.

TC24-2015CS5-ENG Outside-01 (1)IMG_9029
 

Z Car Garage in partnership with OS Giken debuted the first North American (LHD) Datsun 240z to run the TC24-B1Z at the SEMA show in Las Vegas, CA:
ZCG at SEMA 2015

We want to share how this mythical cylinder head sounds, looks and drives.
Turn up your speakers and enjoy!

 

 

IMG_9034






Hello Zcarblog readers! In our next blog posts we aim to demonstrate the importance of a specialty shop for your Nissan/Infiniti/Datsun.

Let’s begin with Justin L’s 2013 370z. He had a Stillen supercharger installed at a local shop and while there are many competent shops that can get your car ready to go, the specialist exists for a reason: we have become proficient at specific installations because the are part of our daily routine.

 

The Stillen supercharger kit for the Z34 is an install we are intimately familiar with, and as a result we corrected several things on Justin’s car including engine codes and a fuse in the intercooler pump system that wasn’t allowing water to be pumped into the IC.  We also adjusted the clutch pedal and crossed the T’s and dotted the I’s as we do for many folks that bring their cars to ZCG.

Rob tuned the car using Ecutek software flashing with a MAP sensor instead of the MAF and Stillen-supplied CAN tunes.  Moving to speed density allows more control improved driveablity from idle to on boost. The results were impressive:

 

Justin’s Z came to us with 360hp/291tq and left with 396hp/321tq at the wheels. Gains of 36hp/30tq using slightly less boost as well with gains throughout the entire rev range. Justin is a happy camper and hopefully we’ve gained another customer for life. Long Live The Z!

 

 




RACING: Hakosuka Runs The Spring Classic!

Filed under: Events,Featured Cars and Projects
by Alvin G @ 12:32 am on June 12, 2017

 

We had fun participating in the inaugural Spring Classic event held on May 19-21 at Mazda Laguna Seca Raceway. The weekend was filled with vintage races celebrating cars from the 70s, 80s, 90s and the Datsun/Nissan presence was impressive!

Racing the Hakosuka

Our duty was race support for Driver/Owner Alex McDowell and his 1971 Nissan Skyline.  This Hakosuka was originally built and raced by Jim Froula who successfully raced it at the famous ROLEX Motorsports Reunion in 2014 and 2015:

IMG_4558 DSC01432
 

This was our first time running the Hako at a road course, and a first time for Alex at the helm. One of the goals of this event was to familiarize ourselves with this machine. Alex, however, is familiar with the Laguna Seca road course having run Spec Miata and his own R32 Skyline GT-R on several occasions:

 

The Hako had fueling issues early on but with some sorting we finished the final race on Sunday, an accomplishment we are proud of.

 

Here is a short video showing the sights and sounds of the Hako on the racetrack, turn the volume up and enjoy!

 

Datsuns Galore in Trans-Am 2.5 liter

My favorite part of the Spring Classic was its “mini” Rolex event-like feel.  All the excitement of wheel-to-wheel battles with your favorite vintage race cars…in a relaxed atmosphere without the huge crowds. One of the most anticipated and action-packed races was the 2.5 Trans Am Liter group including almost a dozen Datsun 510s!

 

 

Our friends Jim Froula, Dave Stone, Steve Link and Troy Ermish put on a show in their B-sedan Datsun 510s. Heated battles can be seen in the nice video below assembled by Steve and Mary Walker:

 

Troy in his Blue/Black (38) 510 won both Trans-Am 2.5 Liter races on Sunday, dueling with a 911 and eventually passing him for the win.

 
 

Troy is an amazing guy and phenomenal driver.  See video below:

 

Adding to the Datsun Domination were several Z cars running alongside us in the 1967-1972 Formula B group.  John Wilkins 240z and Less Cannaday’s 280zx:

 
 

Glenn Chiou and his beautifully prepped 240z.

 

Trans-Am Muscle

I love muscle cars. The Trans Am group is my personal favorite and the Spring Classic did not disappoint. Despite the laid-back atmosphere these heart-pounding machines still got adrenaline flowing and ears blazing.

 

The line-up from pit lane for Trans-Am…HEAVEN!

 

Epic Paddock Finds

Another highlight of vintage racing events at Laguna Seca is finding eye candy in the paddock. Top of my list had to be this street-converted 1979 BMW M1 Procar, restored by Canepa. Look at those wheels!

 

 

Air-cooled magnificence. 356, 993-4S and race:

 

Radical race cars from wayback:

 
 

Lastly, how can we forget our very own Ms. ButterZ that Rob commuted in, followed by Alex’s Kenmeri Skyline. This is how you arrive and drive at ‘Seca!

 

Thank you for all the friends that stopped by to say hello and Michelle Schall for the track photos. We hope the Spring Classic becomes a yearly staple to keep historic racing fans happy!

Please visit our photo gallery for more pictures!


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EVENTS: 2017 Solvang Datsun Roadster Show!

Filed under: Events
by Alvin G @ 1:23 am on May 4, 2017

 

The 2017 Solvang Datsun Roadster show took place on April 22. Now in its 30th year, this event continues a tradition of uniting owners from all parts of the world in a little town just outside of Santa Barbara. There is something for everyone here: shopping, food, wine-tasting, outdoor activities, and in the last weekend of April an epic gathering of Datsuns!

  
 

This year I was fortunate to bring my roadster and family to enjoy the weekend…

 
 

…and it was a fantastic show with perfect weather and close to 100 Datsuns on First Street in downtown Solvang:


Photo: Michael Anderson

On to the cars! Here are some highlights from the day…there were only a handful of 1967 2000 roadsters this year. Some of these cars are considered the “cream of the crop” with full restorations or OEM levels of detail like Mike Young’s SRL #266:

 

Winning best of show was this SR311 #0086, frame-off restored by Steve Pettersen:


This Right-Hand-Drive model had neat details like Enkei Compe-8 wheels, rear parcel shelf bracing and a km/h speedometer:

 
 

Roadsters were arranged by year and class, either stock or modified. The organizers did a phenomenal job of staging everyone!

 

Going the Distance

The Solvang Show draws roadster owners from all over the US, and world! We can always count on Jim and Susan to make the trek from Sonora, Mexico in their ’68 SRL with matching trailer.  Richard and Erika visited from the Netherlands and drove from Bellvue, Washington with their host, Ted Heaton. Catch their Roadster road-trip over on 311s.org.

   
 

Stock is Good

Solvang showcases everything from pristine to highly modified examples of roadsters. These two early 1600s were very sharp with requisite whitewall tires, chrome-ringed gauges and classy red interiors:

 

Sitting perfectly as a bookend to the low-windshield 1600s was Mike’s 67.5 SPL.  With a Solex carb’d R16 stroker, factory (high) roll bar, red interior and Watanabe wheels this car is very tasty:

 

 

Engine Swaps

Like the 510 and Z cars, the Datsun Roadster chassis accept many engine swaps and several caught my eye this year.  It is worth mentioning that this year’s show had the most SR20 swaps to date. I parked in a row of about 8!

 

I first saw this VG30-powered ’67 last year:

   
 

The S2000-powered ’69 SRL made a return appearance and it still blew my mind. Such a clean, OEM-level install:

   
 

Two SR20-swapped roadsters deserved some further inspection. John Daly’s ’67 sported a neatly integrated A/C unit on the NA S15 and a factory-like hardtop. What I thought were SSR MKii wheels were actually “Migu” units. Note split front bumpers:

      
 

Kevin Desirello’s ’69 had a simple, clean aesthetic. S14 SR20,  Z32 brakes, RS-8 wheels and clever “SR20” badging were all nice touches:


   

It is always good to see show favorites returning year after year with constant evolvement. Ted Heaton drove his Spriso Motorsports-built ’66 all the way from Washington.

 

The Plymouth Prowler Orange beauty has an S15 SR20DET with 6-speed and Ford rear end. Other nice details include wide RS-8 wheels and Mercedes G-Wagen headlights! Ted was very proud of his power-adding badges :

  
 

Trends?

If you think engine swaps are gaining popularity what other trends are developing? Hardtops are slowly showing up. With factory-like options from aftermarket companies you too can have a body-color (or any finish) hardtop for your roadster:
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