Z Car Garage has been supporting the Nissan/Infiniti Z and G-series sports cars since 2004. At just about any time during the day at our shop you can spot a 350Z, 370Z or G37 undergoing routine maintenance or performance upgrades. Many of our late-model Z car clients are referrals and we are happy to oblige when scheduling allows. We met Frank M in 2020 when he had us perform clutch work on his 370Z. The install went super smooth, and Frank and Rob began their relationship.
“I first heard about The Z car garage through another Z car enthusiast, he had nothing but great things to say about the service he had received working with the crew there. I reached out the Rob to have my 370Z’s clutch replaced with the Z-Speed CMAK clutch kit. That was the first job you all did for me.”
A common issue on the 370Z is the internal slave failing due to heat. Thankfully Z Speed Performance makes a kit to convert the internal slave to external (CMAK Upgrade). We installed their Stage 1 Clutch kit on Frank’s Z:
On his next visit to ZCG, Frank had us perform an alignment after suspension work including Eibach Pro-kit lowering springs (KW-V3 coil-overs next) and Hotchkis front and rear sway bars and SPC rear adjustable camber arms. We also replaced the rear diff bushings with new Whiteline parts.
Frank is a handy guy and he’s done much of the work on his Z himself. For something that is beyond the scope of a simple weekend project he brings it to ZCG. In summer 2022, with 77k miles Frank installed an oil pressure gauge (VLS) and didn’t like the levels it was reading. There is a very common issue on the VQ37HR where oil gallery gaskets fail, resulting in low-oil pressure to front of the engine.
CPZ makes updated gallery gasket with really nice hardware. At the same time to help with oil cooling we installed the CPZ 25-row oil cooler with a thermostatically-controlled Setrab unit:
Wheels Make the Car
Mark has great taste in wheels, choosing a set of Work Racing CR2Pwith Michelin Pilot Sport 4s tires 265/35 and 305/30 rears:
We spent time with the 2023 Nissan Z back in June and Frank was kind enough to lend us his WORK wheels to test fit on the RZ34:
Frank purchased his 370Z bone stock, being the second owner and has added the following mods:
Drive train
Fast Intentions stainless steel CBE exhaust
Stop Tech front and rear vented drilled and slotted zinc coated rotors
Stop Tech carbon ceramic pads front and rear
Stillen CARB legal cold air intakes
VLS oil pressure gauge
Aesthetics
Custom retrofitted headlights by me honey comb projector lens. Blue demon eye. Black and gunmetal paint job plus new Morimoto clear lenses.
Evo-R carbon fang cover,carbon type three front lip, carbon upper bumper cover, pearl white base carbon top high wing and CF door handles
Fujimura rear lower diffuser
Enjoying The Ride
You can catch Frank carving up the Bay Area backroads like HWY 9 runs up to Skyline and Alice’s:
Frank is stoked with his Z car:
“The performance gains from the work Z Car Garage performed was great. The clutch feel is much improved and does not slip it also seems to shift smoother. The oil pressure is up 15 pounds at idle from the oil gallery gaskets and the car runs much cooler after the oil cooler install. I think the cooler temps help the car not heat soak on hot days while pushing it on back roads. The best thing about the Z car Garage is when I leave my car there for service, I never worry about it being there. I know the car is taken care of as if Rob owned it himself. I have nothing but good thing to say about you all. I do a lot of work on the car myself but Z Car Garage is the only shop I will use if I need the help.”
Thanks for your support Frank it was pleasure working with you and seeing enjoy your Z. See more photos in the gallery below, and contact us to schedule an appointment for dyno tuning, maintenance or upgrades on your 370Z or Infiniti sports car!
We had a great time enjoying the 2023 Nissan Z during Monterey Car Week. Thanks to Nissan, we got to enjoy driving the Z to several special events and dyno test it at our shop. Let’s get straight to the numbers!
This is the Performance model in Two-Tone Ikazuchi Yellow TriCoat / Super Black and 9-speed automatic. In stock form and 91 octane it put down 345hp/362tq to the wheels. The dyno plot below shows dyno results from the Yellow automatic Z and the Passion Red 6-speed manual Z we dyno tested in June. Super excited to tune the new Z and unlock more power!
Enjoy this video of the dyno runs, road testing and exhaust sounds.Volume up!
Note, this automatic model has a different exhaust system than the manual model.
Huge thanks to Nissan for lending us the Z to enjoy during Monterey Car Week. Here is our coverage if you missed it
Z Car Garage specializes in dyno tuning vintage cars. Our in-house dyno and expertise in carb tuning can help your engine reach its potential whether it is a street car or full race car. We love Datsun roadsters and recently dyno tuned Erik’s 1970 1600 with great results. Let’s take a look at how he got into Datsuns…
Roadster Beginnings
Affectionately named “Audrey”, Erik bought this 1970 Datsun Sports 1600 in 1995 and drove her every day while living in San Jose and Santa Monica, CA. He had lots of adventures in those days, including driving on Highway 1, Route 66, and even blowing a head gasket in the desert outside Needles, CA.
“In 1998 he got a job in Thailand and Audrey was put in storage. Stored outside for years, she suffered the indignity of being broken into and vandalized. (I’m still apologizing to her for that.)In 2000, I moved back to the USA, but had no garage for Audrey, so she remained outside, staying with friends and family. By 2003 she had finally moved inside, but a busy life and no shop space meant that she sat in the corner, patiently awaiting resurrection.”
“Fast forward to 2019: now having a great garage space and some free time, it was time to get Audrey back on the road. On the outside, she still wears most of what’s left of her original 52 year old paint, but inside and underneath it’s a different story: Her factory 96 horsepower has been doubled using the original engine, and her 4 speed transmission has been swapped for a 5 speed. The body was removed from the frame, all suspension, steering, and brakes were redone/upgraded, all electrical wiring replaced, every nut and bolt was either re-plated or replaced, and the interior restoration has begun, slowly changing from black to red.”
Erik and Z Car Garage
Erik heard about Z Car Garage through 311s.org, the definitive resource for all things Datsun Roadster. He purchased a G35 coupe and called Rob to talk about performance upgrades and the Infiniti was turned into a supercharged beast making 560whp.
“Since then, Rob has been super helpful while I’ve been restoring my 1970 Datsun 1600 from connecting me with the engine and transmission rebuilders, to helping with parts restoration, zinc plating, advice, and moral support. Once I had the car assembled and the new engine broken in, I knew I wanted to get it tuned on the ZCG dyno.”
Dyno Tuning
Erik’s roadster is a “1600” model, originally sporting 1.6L (R16) with dual-SU induction and 4-speed drivetrain. His restoration included stroking the original motor to a larger 2150cc displacement with twin-Mikuni induction and 5-speed (u20) transmission. You can learn more about Erik’s restoration efforts and the Rebello stroker R16 drivetrain all on 311s.org HERE.
Our initial dyno tuning session was with Phh40 Mikuni carbs. While it made great power Rob had always suggested running a larger Phh44 carbs to take advantage of the stout Rebello cam. Erik returned for another dyno session. With the carb switch, A/F ratio and timing optimized the roadster put down an impressive 157hp/151tq to the wheels with improved driveability throughout the entire rev range:
Erik was stoked with the tuning results:
“After finding some compatibility issues with my carburetors, Rob helped me build and install bigger carbs (the ones Rob had told me to use all along!). Came back for another tuning session and wow – what a difference. More power everywhere, better idle and driveability, and top end power is phenomenal. Many thanks to Rob and the whole Z Car Garage crew for taking my car from good to amazing!”
Enjoy this video of the roadster being dyno tuned and road tested, volume up!
Interested in what our other Datsun Roadster dyno sessions look like? Visit zcarblog.com
Enjoying The Ride
Datsuns Are Driven! In true roadster fashion, Erik has been Enjoying the Ride in his revived “Audrey”. We got the roadster prepped for a 600+ mile road trip to the Annual Datsun Roadster Meet at Mt. Shasta back in June. The car ran flawlessly:
Erik has been attending local car shows and rallys including VALT Car show in Berkeley, CA and Breakfast Club Rally.
We had fun tuning Erik’s roadster and getting it dialed in with the new drivetrain. Eventually it will be time for bodywork and paint, but he’s too busy having fun on the road! Thanks for letting us be a part of your Datsun journey Erik, you’ve done the roadster justice! If you have a vintage car (it doesn’t have to be a Datsun) feel free to contact the shop to schedule a dyno tuning session. More photos in the gallery below.
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.
“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:
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!
Nikon F6 | Nikkor 24-70mm f/2.8G | Cinestill 50D 50
Scanned with Noritsu HS-1800
Lab developed in | Dip and Dunk
Mamiya 645E | Mamiya 45mm f/2.8 N | Lomography Color 100 100
Scanned with Epson V750 | Epson V850 120
Lab developed in | Dip and Dunk
Our Z Car Garage Big Brakes have been winning over Z-car enthusiasts locally and globally. Jay recently purchased a set for his 1972 Datsun 240Z and performed the installation himself at home in South Carolina. Last year Jay also purchased a set of Panasport wheels from ZCG and he’s been enjoying the ride. Before we go into his Big-Brake experience let’s hear his Z-story…
“The car was from California and made its way to Gainesville FL and was put in storage. I had been looking for a good 240 and this one was taken by the owner to a shop owned by a friend of a friend. The guy wanted to get it running and sell it. That triggered a phone call to me while on a anniversary trip with my wife to Italy, we were living in St Augustine Florida at the time. My buddy sent me some pics and a quick video and he grabbed the car for me. It was all there and very little rust. I had not really considered a Blue one, much less one with white interior.”
Jay and 3 friends restored the car (minus paint and the head work) in his 2 car garage over 3 years. Jay has met so many people in the Z community and learned much about Z cars:
Beautiful engine bay with new engine:
Check out the before/after on the interior…great work Jay and friends!
Jay recalls how he found ZCG and eventually purchased a set of Panasports from us:
“I found the Z Car Garage videos on YouTube very early on which led me to your website. I went to Daytona to see Randy Jaffe’s #46 BRE 240z car run and left just before John rolled it. I met Rob at the Amelia Concours earlier this year and bought a set of Panasports from the shop. I also have become friends and an Insurance client of Jim Frederick in Lutz Florida who I believe has the finest collection of low VIN original Z’s in the World! Jim has also helped me with parts and advice on this build. I am hoping Larry Chen will make it down to film Jim’s collection.”
Z Car Garage Big-Brakes
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:
Big-Brake Kits Available For DIY Install!
Z Car Garage is proud to offer our Big-Brake Kit to Z-Car owners that want to perform the installation themselves. We can ship worldwide and each kit contains everything needed with a comprehensive (40-page) installation guide. Blog posts documenting all of our customers running the ZCG Big-Brakes can be found HERE. Enjoy these pictures of Jay’s beautiful S30 and his ZCG Big-Brake installation:
As mentioned, our ZCG Big-Brake kit ships with everything needed to install and retains the factory parking brake. Jay successfully installed the BBK on his Z along with a full suspension rebuild:
“The kit was packed and labeled extremely well, everything was included except for brake fluid. The manual Rob sent me was very good. If you are looking for a great bolt on brake solution for your S30 with no need to cut n paste parts to make it all work, look no further than Z Car Garage. Great quality and Great folks to deal with. I had a small hiccup and Rob jumped on the phone and had me fixed up. Very happy with my purchase!”
Jay used OEM bushings and parts for his suspension refresh and full exhaust system from Zstory:
Beyond ease of installation and quality components, our Big-Brakes perform by offering superb pedal feel…everyone that drives our demo Z confirms! 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. Jay was very happy as well with great feedback:
“The performance of the brakes is awesome. My car is essentially a stock L24 but I live in the Blue Ridge Mountains and we have a lot of great driving roads and frankly the stock brakes sort of didn’t inspire confidence. This allows me to drive the car a lot harder with no worries. Super happy with the fit, finish & performance of the brakes. Thanks to you guys for making parts that take these old cars to the next level.”
Enjoying the Ride
Jay has been braking deeper and with more confidence on those Blue Ridge mountain roads, we love that this Z gets driven! Enjoy the short video Jay sent us the Z in action:
You can see more pictures in the gallery and thanks for your support Jay! Stay tuned for more customer installations of our ZCG Big-Brakes! Check out our ZCG CV axles HERE. Long Live The Z!
Panasport wheels for your Z car
Treat your Z to a brand new set of Panasport wheels! Z Car Garage is an authorized Panasport dealer and have limited sets available for fitment on your S30 Z car. We special order this offset to enable fitment of a 225/50/16 tire on the 1970 to 1978 S30s.
Contact us: rob@zcargarage.com or call 408-452-0350 Limited availability (pallet pictured)
Wondering how a set of Panasports would look on your Z car? Please enjoy pictures below of ZCG customer cars in jus about every color imaginable with Panasport wheels:
