We have the pleasure of continually developing Dirk’s 1973 Datsun 240z to help achieve his vision of a Z car that is adept on the street and track. Improving the driving experience are our Z Car Garage Big-Brakes, Z Car Garage CV Axles, Silvia 6-speed transmission and a host of chassis and driveline upgrades.

 

Dirk shares his experience working with us:

“Collaborating closely with Rob and ZCG has elevated the optimization process. Rob will frequently talk me out of a bad idea, or into a good one (like the OS Giken LSD). Sometimes I talk him into a bad idea and it turns out to work really well, like the S15 gearbox. The most fun is when we brainstorm stuff together like turning the catch can setup into an improvised simple PCV system, eliminating all hints of oil fumes from the car while running.”

Datsun 510, 620 and Z car love

Since our last iteration, Dirk as been back to Z Car Garage for a few major projects. Let’s take a look at his Datsun story first. Dirk bought his first Datsun in 2014, a 1970 510, to learn how to work on cars himself. After learning more about the history of Datsun, and the significance of both the 510 and the 240Z in establishing Japanese cars in the American market, he knew he had to own a Z as well.

  

A year later, the right Z showed up on eBay in Texas, a 1973 in silver gray. After pouring over the photos and talking to the seller, Dirk bought the car sight unseen. The idea was to have a nice Z to enjoy and drive, while continuing to work on the (sometimes not) rolling restoration of his 510. The car was lovingly restored by a dad and his children and in mostly stock condition. Dirk also has Datsun 620 work truck complete with dual-Mikuni’s:

  After many more tweaks, different induction setups, spring rate changes, rebuilt stock brakes, and 24K miles of driving including a few track days, Dirk’s Z was inching closer and closer to his vision.

 Photos: Dito Milian/Gotbluemilk.com 

“After installing a Datsun Spirit STR-3 engine with a set of Nismo Mikuni PHH44 carburetors, the biggest weak spots left were the rest of the drivetrain (especially the stock 4-speed transmission, but the Subaru diff had also developed some bearing issues), the stock brakes, and of course the loose nut behind the wheel – but sadly that last component typically takes too much money and time to modify thoroughly.”

  

After comparing the Z to his Subaru BRZ on the track, it was clear the Z was better at everything except for shifting gears. Since his engine made a healthy amount of torque, but not enough to warrant a CD009 (350z) transmission, Dirk kept looking for alternatives. He also wanted something with slightly closer gear ratios to better suit the engine’s power band. An S15 Silvia 6-speed seemed like the perfect fit and we installed it back in 2019.

S15 6-speed transmission

  

The first S15 box had some weak synchros, so Dirk sourced another one that was installed with OE trans fluid, as well as a set of fresh OE motor and trans mounts to help with shifter feel and reduce vibrations in the car.

“The S15 transmission fit surprisingly well. ZCG built a custom crossmember to locate it, and the shifter lined up almost perfectly. No transmission tunnel mods were necessary. The modern shifter looked out of place, so ZCG built a custom unit that would look stock, and work with the Datsun competition shift knob. A small 6-speed shift pattern sticker modeled after the one used in the Silvia is the only clue there’s something different going on under this car. And of course the driving experience.”

Making the S15 shifter look factory, we are happy with the result and Dirk’s subtle shift pattern sticker:

   

The Datsun Comp shift knob complements the steering wheel:

 

Chassis and Driveline Upgrades

First, there was work to upgrade the steering geometry and suspension. With the car being lowered quite a bit, despite having 1″ RCAs installed, it had a ton of bump steer. Rob installed DP racing adjustable tie rods, removed the front springs, and completely eliminated the bump steer on the alignment rack while moving the suspension through its full range of motion.

New DP Racing tie-rods and in-house alignment:

 

We also refurbished Dirk’s steering rack with fresh parts from our stash:

 

With the Z back in the shop for bodywork we took the opportunity to make more suspension changes. New Koni Race shocks from T3 were installed, which were a much better match for the 300# and 350# spring rates than the Koni Sport shocks they replaced (as Dirk initially ordered the coil overs with lower spring rates, he never replaced the shocks after adjusting the spring rates, and the car always felt underdamped, particularly on the not-adjustable compression stroke):

 

ZCG Big-Brakes and CV Axles

    Dirk visited ZCG and drove “Mrs. Butters”, our 1970 Series 1 240z shop demo car and he was sold on our Z Car Garage Big-Brakes (for small wheels) and Z Car Garage CV Axles! Butters has a way of doing this to our customers 🙂 As fellow S30 owner/racer Glenn C mentioned in his review, on top of braking performance, pedal feel is extremely important and our Big-Brakes deliver. This is a direct result of working with Stoptech to create a totally bolt-in solution requiring no M/C change or additional proportioning valve/adjustments. All fitting behind a 15″ Watanabe or Panasport wheel and retaining factory emergency brake lever! A few details below:

Calipers: Stoptech ST42 4-piston front & rear race calipers (Alum 6061 mil-spec Type III anodized)

Rotors: 280mm x 20.6 with Alum 7075 hats

Pads: Stoptech 309 sport street pads

Blog posts documenting all of our customers running the ZCG Big-Brakes can be found HERE.

A few closer detail shots of the calipers, rotors and hardware:

   

We removed Dirk’s stock brakes and installed our ZCG Big-Brake kit.

 ZCG Big-brakes replacing stock setup up front:

   

At the rear, the factory drum brakes were replaced with our ZCG Big-Brakes. Factory handbrake functionality retained!

    Our Z Car Garage CV Axles help transmit power to the ground and ensure smoother operation compared to your standard half shafts. We have over 70 CV axle kits on customer cars and we are stoked with all of the positive feedback.

  

Also visible on Dirk’s Z are the excellent adjustable lower control arms from Techno Toy Tuning.

  

3 Liter L-Series Power

Unfortunately, the Datsun Spirit engine developed rod knock which was the impetus for a big drivetrain upgrade. Several other parts of the car where refined as well.

 

The L28 engine was pulled, sent to Rebello, and built into a 3L powerhouse. Dave bored out the 44PHH venturis to a custom 38.5mm, to hit the perfect compromise between peak power and drivability. We also installed a fresh water pump, alternator, new fan blade, OEM fan clutch and fresh air filters. The beautiful DP Racing oil pan remained. More photos in the gallery below:

 A custom stainless 2.5″ mandrel-bent exhaust mates with a new set of coated Pacesetter headers and Z Story Street muffler (in a search for a reduction in volume while keeping a nice note). Dirk discusses the clutch/flywheel combo below:

 

“The STR-3 already was able to slip the Exedy clutch and we were never fans of the Chromoly steel flywheel. A Jim Wolf Technologies clutch and flywheel combo was installed after first trying a newly developed Kameari single plate street clutch kit, which we both found too loud and racy for this street car. While the JWT pressure plate yielded a different pedal feel that took some getting used too, it was not too heavy and perfectly comfortable to drive in traffic. More importantly, it never slipped under any kind of abuse.”

The clutch hydraulics were replaced to work with new alumimum flywheel/JWT HD clutch combo:

  

We installed a ZCG-built 4.11 OS Giken limited-slip differential in the R180 along with a custom aluminum driveshaft:

   

Dyno Tuning

 

The previous L28 made 202hp/194tq at the wheels with Rob’s tuning. Now with the fresh 3L it baselined at 245hp/226tq with more area under the curve:

 

Rob tuned the car further on the chassis dyno, setting it up with a very lean idle at Dirk’s request (to minimize gasoline fumes at idle). With A/F optimized and Nismo Mikuni carbs massaged, Rob unlocked another 20hp yielding a stout 265hp/232tq to the wheels:

  

With gains of 62hp/37tq at the wheels over the L28, Dirk is very happy with the new 3L:

“While the Datsun Spirit engine had a very peppy mid-range and made more delicious induction noises, there’s no argument that the more powerful Rebello engine elevated the car to the next level of performance and fun. The entire setup worked incredibly well together, and we hit an impressive 265hp at the rear wheels, or 60hp more than the engine made in its previous iteration, putting it in the 100hp/liter ballpark at the crank. Not bad for a dinosaur engine on California pump gas!”

Enjoy the dyno video and L-series music!

 

Sorting

The little things are what we excel at and Dirk had a list for us to knock out. While at ZCG, we replaced the heavily sandblasted OE windshield, and did some rust remediation in the cowl area, as Dirk had started noticing water making it into the interior fan assembly after washing the car. More photos in the gallery below:

  

The heater and blower motor assembly was refurbished with new ducting seals and lubed linkage:

 

The headlight switch had also developed some issues where sometimes the lights would turn off completely when switching between low and high beam, and was replaced with a good used example from the ZCG parts stash.

“The headlights now worked reliably, the new engine didn’t consume any significant amount of oil, and the whole drivetrain worked together even better than before with the new clutch and flywheel combo.”

 

Unfortunately, 7 months and many miles later, Dirk was back after a minor nighttime crash that took out the left fender, front bumper and valance, and dented the hood. After bodywork and paint from our man William from William’s Auto Body, we installed a euro front bumper, used turn signal assembly, cleaned up electrical wiring from alternator through firewall and sorted his Speedhut GPS speedo box.

  

To improve safety, comfort, and avoid future crashes, Dirk upgraded his headlights to a new set of Holley Retrobrights, and GTR Carbide 2.0 turn signal bulbs front and rear from Headlight Revolution.

“The headlights are a world ahead of the old Maxxima LED units, which themselves outperformed the Sylvania Halogen sealed beams, while staying very under the radar, with their sealed beam-inspired looks. And the turn signals are now highly noticeable, even in the brightest daylight.”

 

Enjoying the Ride

Dirk’s been driving his Z-car pretty much every day since the latest upgrades, and it’s been working phenomenally well:

“The drivetrain + brakes make it as happy to accelerate as it is to stop, and with the quick, closely spaced shifts and eager engine, it’s fun to do a casual grocery run, and to drive quickly. With the electrical systems and all fumes well under control, it’s truly a car you can do anything with, and probably more reliable than my BMW.”

 

We loved to see Dirk driving his Z on rallies and fun runs this year. Most recently we joined fellow Japanese vintage car owners on the Tokyo Calling event hosted by Breakfast Club Rally:

 

Dirk also joined us for a New Year’s Day drive through our favorite Bay Area Backroads:

 

We enjoyed working with you Dirk and it was rewarding to help improve your Z.

“Some say good is the enemy of great, but that’s true if you think you’re done. I don’t see my Z car less as a “build” that’s done. I’m always developing it, just like continually developing a race car (e.g. my Lemons car, http://instagram.com/bittersc243) to stay competitive. In this case the competition is merely for making the Z into the most fun driving experience I can imagine, and the journey of continuous refinement and improvement is a big part of the fun for me.”

 

While Dirk works through a few interior projects (new carpets, stereo upgrade) on his own, we’re getting ready to further revise the front suspension/steering, and wider wheel + tire options. Enjoy more photo documentation of our work in the gallery below. Thanks for your support Dirk and LONG LIVE THE Z!

 

 

On Saturday, September 24 the Breakfast Club Rally is hosting Tokyo Calling 2, their second All-Japanese car rally in San Rafael, Ca.

To register and see more details, please visit their website HERE

 

We have run several rallies with Breakfast Club and it is a total blast, you can see my previous event reports HERE.

Stay tuned for caravan information from Z Car Garage.

Z you there!

 

 

 

Richard W brought his 1971 Datsun 240Z from Eureka, Ca to Z Car Garage for a full mechanical restoration back in 2020. Our Z Car Garage Big-Brakes, Z Car Garage CV Axles and Z Car Garage Heat Shield along with a new drivetrain and full suspension transformed this Series 1 S30.

 

With a few thousand miles on the build Richard visited ZCG earlier this year for routine maintenance. We changed the fluids, resolved a charging issue, checked the driveline and overall health of the Z.

 

While the Z was with us we performed extensive road testing with acceleration, freeway cruising, dyno runs and more all shown in the video below. Turn those speakers up and enjoy!

 

I could not resist taking more photos of the engine, interior and chassis on this gorgeous Sunshine Yellow Series 1. Enjoy some photos from his recent visit and of course zcarblog has the full report on our restoration of Richard’s Z.

 

Drivetrain

 

We got the original L24 with SUs running after sitting for years, but Richard wanted more power and Rob suggested a Rebello 3.1L engine. Supporting parts included an MSA 6-into-1 header, ZCG exhaust system, internally regulated 280ZX alternator, 280ZX gear reduction starter, KOYO race radiator (custom upper hose) and Z Car Garage Heat Shield. Here are a few pictures of the engine build/installation with many more in the gallery:

 

To handle the power from the 3.1L engine we replaced the stock transmission with a Nissan KA24 (FS5W71C) transmission. This was a common swap (before the CD009a came to market) performed by modifying a 280Z L-series bell housing. When we upgraded the transmission we also installed a JWT HD clutch with aluminum flywheel. Helping put the power down efficiently is an OS Giken LSD. The R180 houses a 4.11 R&P and the assembly is setup in-house (by Joshua Corwin).

 

Engine Bay Services

Richard’s Z received a total engine bay restoration. Please visit the gallery below for more pictures documenting the engine bay restoration work, it’s where our efforts shine! Final Before/After in the engine bay:

 

Suspension

Richard’s chassis was treated to a full suspension rebuild with new parts, bushings and a full coil-over (Koni struts with our spring rates) suspension from Techno Toy Tuning. T3 finishes the suspension in our signature color and we really appreciate Gabriel and his staff. They make some of the best suspension parts out there for Z cars.

 

Front Suspension refresh with T/C rod, crossmember and steering rack detail: Rear end with T3 lower control arms and ST Sway bar:

         

 

Interior

 

One of our favorite upgrades to the interior of an S30 is our ZCG sound deadening package. Usually found in our full-blown ZCG restorations, the result is a less tinny sound and almost Germanic-like “clunk” when you shut the doors.

  

The stock seats were replaced with Recaro Specialist in black leather, we love these seats for the S30:

  

Please check the gallery below for more detail shots, there are too many to list in this blog post!

Enjoying The Ride

 

It was great to see Richard again and meet his wife this time, recalling how he purchased the Z new in December of 1970! We love that this restoration is out on the road and being enjoyed. It’s also a great example of how no matter how far away you live from Z Car Garage we will help our clients any way we can. Long Live The Z!

“Richard got out of the Z and told me he had bought this Z 50 years ago that week, it’s been with him through alot of stuff and now his kids and grandkids will get to enjoy it. I looked him in the eye and said I’ll be here for their chapters, any time they need me. I’m attached to this Z now too.”

  

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Z Car Garage is proud to bring this 1972 Datsun 240Z OMS Pace Car back to life for our long-time client and friend Linda Williams. Only 50 of these Ontario Motor Speedway (OMS) “duplicates” were created and this is one of only two known survivors .

 

Join us as we revive this historically-significant Z from its slumber to make it a nice driver for Linda while retaining its survivor status. In addition to documenting ZCG’s work we will look at this Z’s history, our relationship with Linda and share her Enjoying the Ride.

  

History and Acquisition

 

Before we dive into the OMS Pace car story let’s take a look at Linda’s Z-car story. We first met Linda in 2008 when she reached out to Z Car Garage for work on her low-mileage 1978 Datsun 280Z:

 

“I had just bought my blue 1978 280Z and had taken it over to Steven’s Creek Nissan Parts Department to have a replacement key made. One of the guys came out and suggested I show it to “Rob” at Z Car Garage.  It was my lucky day as ZONC was having a meeting and a Dyno Day at Z Car Garage! Of course, I didn’t know who Rob was and he was busy but took a few minutes to look at my Z. That’s how I met Rob and began a great friendship and a wonderful working relationship. I also joined Z Owners of Northern California (ZONC) that day too!

Linda became a big part of the local Z car community and eventually became (currently) President of ZONC, one of the oldest Z car clubs in the nation. We have enjoyed helping her keep her Z cars on the road over the years, from Car Show prep to routine maintenance:

 

“Rob has taken very good care of my car and I have a lot of respect for him as a business person. He is honest, open and I don’t feel pressured to do anything on the car that isn’t necessary. In 2012, Rob called and asked if he could ‘borrow my car’ and of course I said ‘yes’, but can you please explain? He then told me he wanted to display it at the San Jose Auto Show in January 2013. I felt honored having it displayed with another restoration Z Car Garage had done, along with many other client Z’s.” 

 

The OMS Pace Car Duplicates

 

Nissan Motors created 50 “Pace Car Duplicates” to commemorate the Datsun 240Z being selected by the Ontario Motor Speedway to Pace the 1972 U.S.A.C. California 500 Championship (shown above). The cars were originally brought over from Japan by Mr. K and were all white with red interior. The blue livery was added here in the states with the “O” that represented the Ontario Motor Speedway. After the race, the cars were given to Datsun Dealerships in the Los Angeles area as a promotion and later sold to the public.

 

Fast forward to 2021 and Linda has located one of the Pace Cars: (shown above) The OMS Pace Car in a period photo from the previous owner in Glacier National Park, and on the day Linda purchased it:

“In August of 2020, a gentleman from Porterville, CA who was handling his father’s estate contacted me and asked if our car club (ZONC) would like to have a car (actually 3 cars) donated to us. I had to explain that we were a 501(c)7 and not a 501(c) 3 and would not be able to accept them, but I was personally very interested in the Z and that began the quest to acquire it.”

 

We told Linda this was a “must buy” as the car advertised had original paint/interior, 45k miles and above all it was 1 of those 50 “tribute” cars made by Nissan. Of those 50 cars, it is currently one of only two known survivors! You might be wondering what happened to the actual OMS Pace car? This is what makes Linda’s tribute Z special, beyond its rarity…as per Carl Beck and other noted Z-car historians, the original OMS Pace Car car was this Z shown below (L):

 

Above (R) is a photo of Mr. K presenting the keys to the Datsun 240Z Pace Car to Mr. John Cooper, President of Ontario Motor Speedway. This Z was used as the Official Pace Car for the ” California 500″ held on Sept. 3, 1972. It really is a small Datsun world and amazingly this exact car is in our shop at Z Car Garage…it is none other than the Joel Anderson #49 IMSA GTU 240Z !

 

After running as the official OMS Pace Car in 1972, it was purchased by Joel Anderson from the Datsun Competition Dept. for $1.00 and Joel picked it up at Sears Point from Bob Bondurant in 1979. Joel prepared the Z for IMSA GT-U competition sporting wide aero and his iconic black livery. Yes, #49 still has the checkered flag holder in the driver’s rear quarter panel from its OMS career. We are stoked to have both Tribute and original OMS Pace Cars at the shop!

Z Car Garage Revival

 

Linda had the OMS tribute towed to Z Car Garage and we sat down to discuss the future of the car. We both agreed to keep it as original as we could, while updating critical parts to bring it back to life and make it a safe, fun car to drive. Our goal was to have it ready for the 34th Annual Z Car Convention (ZCON) in August of 2021.

“My plans are to drive the car and enjoy it as a ‘survivor car’. It draws a lot of attention and I love sharing it with the car community, and telling her story to those that haven’t heard anything about the Tribute cars. I have the paperwork back to the original owner, many invoices that corroborate the mileage and original Warranty Book with the ‘credit card’ warranty card.”

Indeed, Linda has a treasure box of period photos/records all relevant to her OMS tribute Z:

    

Engine

 

The Z had not been running since 2006 so we went through the fuel and cooling systems, suspension, brakes and supporting parts to make it a fantastic driver. Starting with the engine bay, we performed general clean-up of the inner fender/firewall areas.

 

A fresh set of Z therapy SU carbs were installed along with an MSA 6 to 1 header and full ZCG exhaust system:

 

All coolant hoses were replaced and radiator refurbished:

 

Fuel tank refurbishment with new hoses and all new evap lines:

 

On the dyno, the stock L24 made 120hp/125tq at the wheels:

 

Enjoy this video of the dyno run and a walk-around of the Z after our revival:

 

Chassis

 

With respect to the low mileage of this chassis and provenance we performed a “sympathetic” refresh to make it road-worthy. The suspension was removed and replaced with new hardware and bushings throughout. New parts from Techno Toy Tuning included adjustable T/C rods and rear lower control arms. Before/after shots below with more in the gallery.

   New tie-rods, rack bushings, and engine mounts. KYB strut inserts, Eibach lowering springs trimmed Macpherson bumps stops for full travel and a ST sway bar set:

 We rebuilt and replaced all factory brake components including new calipers with Stoptech rotors, rear drums/shoes+wheel cylinders, new wheel bearings front and rear:

     

Fresh brake master cylinder and booster:

 

 

New drum brake components:

 

Details

 

Finishing touches for Linda’s Z included completing the OMS livery. We did not repaint the car because of its survivor status. A cut/buff was sufficient, and “O” decals were sourced/applied just before heading to ZCON. As it arrived (L) and after (R):

 

Interior

 

The original interior was refreshed with a nicer set of seats from fellow ZONC members Paul and Ann Devor:

 

All weatherstripping was replaced from hatch to doors.

 

Small details like a a new shifter gasket, heater core/ducting refurbishment and window regulator sorting make driving enjoyable:

 

Enjoying The Ride

 

Linda drives her Datsuns. We got the OMS Pace Car tribute in great mechanical shape and she has been driving it everywhere on local runs and gatherings. Most recently on April 10 she joined fellow Z owner Bryan for a local Bay Area drive and the odometer turned 47,000 miles!

 

In March she completed a 300-mile Breakfast Club Rally with us in Sonoma, CA. The OMS Pace Car ran like a champ, handling the twisty roads with zero mechanical issues:

 

In August 2021 we finished preparing the Z just in time for the 34th Annual Z Car Convention (ZCON) hosted by ZCCA in Colorado Springs. The OMS car was well-received at the show, Pete Brock approved!

   

At ZCON with the new Z and track laps!

 

Photographer  Larry Chen and Rob Fuller highlighted Linda’s Z in their walk-around from ZCON, enjoy:

 

 

Did we mention that this Z gets driven?!

 

The OMS Pace Car tribute joining us at the 2023 New Z Viewing Event:

 

Linda has been all smiles:

“When I bought the car, I did not drive it due to it not being operated for so many years. The last thing that I wanted to do is possibly damage it before I even got to drive it. When I delivered the car to Rob, he went through it and did everything he could to maintain the ‘Tribute Car’ provenance, yet give me a car that I could enjoy driving. She is kept garaged, but she’s driven and enjoyed. The car drives like a “Z” and I am so thrilled that Rob did his magic with her.”

 

Thank You!

 

Z Car Garage thanks Linda for her unwavering support. We love your passion Linda and how you wave the flag for Nissan/Datsun history. The OMS Pace Car tribute is in great hands for the next generation to appreciate. From Rob:

“We live for this. Finding these hidden gems that have been sitting and bringing them back to life because Datsuns are Driven.  Linda’s Z became a wonderful driver that puts a smile on my face not only when I’m behind the wheel but when I hop out and look  back at it. How small and magical is this Datsun world where we can have the actual pace car (1 of 3) and tribute (1 of 50) in the same shop and work on them both. Thanks to Linda for believing in ZCG”

More pictures in the gallery below and…LONG LIVE THE Z!

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Brad L is the original owner of this 2008 Nismo 350z #1188. He generally uses this Z for fun road trips and wanted a little more power so we installed a Stillen supercharger kit last year. Brad recently visited Z Car Garage for routine maintenance and we spent some time admiring the details Nissan added to this rare Z33. Enjoy the photos!

When the Nismo Z33 made its debut 15(!) years ago its aero package was considered downright shocking. We think it has aged well, from the aggressive front fascia and side skirts to that unmistakable SuperGT-inspired rear spoiler/diffuser.

Brembo brakes, and super-sexy NISMO forged wheels still make our mouths water:

The interior also reminds you that this is a special Z with red-accented seats, NISMO white and gray tach, and a serialized NISMO-etched aluminum plaque:

 

With roughly 1,600 units produced for 2007-2008 the Nismo 350Z is quite rare. We still love them. How rad would it be if Nissan offered a Nismo model of the new Z?