When Lehan brought his 1991 R32 GT-R to Z Car Garage it was barely moving under its own power…the clutch failed. We installed an OS Giken TS2CD clutch and flywheel along with an OS Giken T/O bearing.
The OS Giken clutch/flywheel combo weighed 32.8lbs compared to the old setup at 39.6lbs:
Clutch removal/installation:
We also replaced the rear main oil seal while we in there with an OEM seal. The R32 was treated to new clutch hydraulics including master and slave cylinders + hose. It is prudent to replace these units if they haven’t been done in the last 3-5 years.
With a new clutch and hydraulics sorted Lee was back on the road. He was really surprised that we could do a 2-day turn-around clutch replacement on on his 25-year old Japanese classic supercar. Enjoy the Ride Lee and thanks for your support!
Z Car Garage is proud to offer a CV axle conversion kit for your Datsun S30 and 510. For years we have used aftermarket CV axles that utilize an aluminum adapter prone to loosening up over time. Despite efforts to keep things tight (Loctite, hardware changes) we had to keep an eye on them. We developed a better solution that eliminates the need for aluminum adapters and remains 100% bolt-in like a factory half-shaft.
Designed and manufactured locally with KAD Models, the ZCG CV axle kit works in both R180 and R200 configurations.
These are the beefiest CV axles on the market. They have been tested on the track by our vintage racing customers and also in high hp* street cars (powershifting, clutch dumps, etc.). Each axle has a serial # for peace of mind:
The CV axle kit is available now from ZCG for 1595.00 + freight and they come with everything you need to install on your car. Contact us at 408-452-0350 or send Rob an e-mail rob@zcargarage.com to purchase. Installation is just like doing a half-shaft: there is even a marking that shows you where to line up bolts and special hardware:
The ZCG CV Axles in action
The video below demonstrates the “looseness” associated with aftermarket CV axles that use adapters compared to the ZCG axles without adapters. Several customer race/street cars running our CV axles are also shown. Enjoy!
S30 and 510s running the ZCG CV axles
Randy Jaffe’s #46 BRE Datsun 240z received the very first set of ZCG CV axles: Serial # S30-000240!
Race car driver and restoration specialist Jim Froula of Racecraft is running ZCG axles in several of his cars:
Set #246 – installed May 2018 on the “Harry Stewart #52” Datsun 510:
Set #247 – installed April 2018 on the 260z
Set #248 – will be installed on Adam Carolla’s “Greg Sorrentino #90” Datsun 510. We are pleased to report that Jim will also be installing a set on his “George Alderman #32” 300ZX! The ZCG CV axles are also perfect for high hp street cars. The following customer cars are all running our CV axles now:
Frank B’s fuel-injected, 6-speed stroker L-series:
Gary’s 430whp LS3-powered 280z:
Scott W’s EFI stroker L-series:
James S’ L28ET:
Finally, Gary’s “Behemoth” OS Giken TC24B1Z powered S30:
Technical Information:
The Z Car Garage axles were designed to help remove much of the backlash aka clunk seen in many older vehicles. Modern technology has given us the ability to create a set of axles to exacting standards. We started with a high quality set of CV joints that were found to be the most consistent in both major and minor spline diameters. We then began to design the axle itself to share the same tight tolerances. We are holding a +/- .01mm diametric tolerance on both the inner and outer spline diameters. This gives us the feeling of direct connection between differential and wheel. The axle shaft major diameter was increased to 28MM to give owners a bit of added comfort in knowing the main shafts are stout. Once the axles are splined they are then heat treated to obtain the desired harness. After heat treat the axles are then nickel plated to add corrosion resistance. The inner and outer flanges are made from 316 stainless steel and mate to the CV joints with tapered alignment surfaces to ensure concentricity is maintained throughout the axle thus reducing vibration. The inner flange attaches to the stock R series differential utilizing the Nissan factory hardware. The outer flange attaches to the driven stub with bolts specifically designed and manufactured for the Z Car Garage axle installation kit. These bolts are manufactured to grade 8. All ZCG axles are manufactured locally which helps us maintain the fitment and quality we require.
Materials
Axles : Hardened AISI/SAE 4340 Alloy Steel, 4340 is a nickel-chromium-molybdenum alloy steel
Drive flanges: 316 stainless steel, Type 316 steel is an austenitic chromium-nickel stainless steel
Outer Flange Bolts: Hardened 4140 Alloy Steel , AISI or SAE 4130 grade is a low-alloy steel containing chromium and molybdenum as strengthening agents
Each year the Historic Sportscar Racing association (HSR) organizes the largest and oldest event for Historic race cars on the East Coast. It’s called the Classic Motorsports Mitty and it took place at Road Atlanta, GA from April 27-29. We attended The Mitty to provide race support for Randy Jaffe’s #46 BRE Datsun 240z (driven by our hero John Morton) and Alex McDowell’s Datsun Bluebird Coupe and Hakosuka Skyline.
Nissan was the featured marque for the first time with John Morton serving as Grand Marshall so naturally every Datsun-fan was drawn to The Mitty. I took a Thursday night red-eye flight from San Jose with part of the ZCG crew and when we arrived at Road Atlanta our paddock was an absolute feast for the senses. Nestled primely across from the front-straight footbridge, we had an impressive display of West-Coast racers, from L to R: The BRE Datsun 240z, BRE 370z, Comedian Adam Carolla’s #44 Frank Monise Datsun 2000 Roadster and Bob Sharp 610, Alex’s Hakosuka Skyline and Bluebird Coupe, the Friselle GTU 240z, Dave Stone’s Frellsen B-sedan 510, Jim Froula’s (Racecraft) Datsun 260z, our friend Glenn Chiou’s VIPS/Loren St. Lawrence 240z and Bob Clucas’ IMSA GTU 240Z.
Take a Lap With John Morton
At 76 years of age John Morton is still formidable behind the wheel. Here he is piloting the #46 BRE 240z that we prepared around Road Atlanta; the very same track where he won the 1970 and 1971 National C-Production Championships!
Well, That’s Racing
The sweet smell of race fuel, frantic adjustments, checklists, and engines blaring to warm-up for the next session all reminded us how much we love racing! From the on-board video above, you can see the BRE 240z performed well with John Morton at the wheel but what it does not show viewers is the not-so-glamourous side of racing: part failures. The Z ran great in Thursday’s practice but when we arrived at the track Friday morning, Rob told us the engine failed during the first session. He needed all hands on deck. What followed absolutely humbled me; the ZCG crew went to work in a supreme effort to get the #46 BRE 240z alive again for Saturday/Sunday’s races.
John Morton Must Race
To get a first-hand perspective of the Z’s revival I asked ZCG Lead Technician, Josh Corwin, to give us the play-by-play of the heart transplant. Please read on to see a video chronicling the events!
1) How, when and why did the engine fail? It is still too early to know exactly what went wrong with the engine. A complete teardown will be performed to isolate the root cause. I can tell you that during Friday practice, John Morton was accelerating up Road Atlanta’s back straight coming up the hill before turn 10, in top gear at wide open throttle well over 100mph. That is when a major engine component let go resulting in multiple holes being punched through the engine block, affectively turning the engine into a boat anchor.
2) What was the plan to get John Morton back on the track? Get an engine, put it in the car, put John Morton in the car, and put the car on track. Simple enough, except finding an engine that could perform was the challenge.
As word spread through the paddock that John Morton needed an engine, the Datsun Community banded together, and offers of engines came swarming in. Multiple race engines and high performance street engines were all up for grabs. All were seriously built engines, but none of them felt right.
Rob’s ultimate plan to excavate a couple E.B. Parkinson motors, like dinosaur fossils, was crazy to say the least. But, going with his gut, the resurrection of a true vintage race engine was put in motion. Half of the crew went with Randy to his storage to look for a replacement motor, while other half, including myself, received the green light from Rob to began the task of removing the expired power plant in anticipation of the Datsun Relics arrival.
3) Technically, what was involved with swapping parts and prepping the 40-yr old parkinson motor?
The old engine came out quickly, as many hands made light work. It was then tucked away into the back of the trailer, to be disassembled at a later date, as we worked on getting the car ready for its new engine. Prepping the vehicle was pretty simple, but there were necessary steps and precautions that need to happen to make this a successful transplant. We only had one shot at this, so nothing was left to chance.
Below, (L): Gary Brizendine and BRE Engine Chief John Caldwell lend a hand and knowledge: Caldwell is confirming the jetting on the 50mm Mikuni carbs. (R) The original exhaust system from the 1970s is removed from #46. Morton had already blown apart the exhaust tips on the first session!
With any catastrophic engine failure, one of the concerns is metal bits getting stuck in the oil cooler and lines. So, first thing is to remove the oil cooler and hoses and flush them out. Any leftover engine material in the oiling system can destroy a fresh engine in minutes. Luckily, Road Atlanta’s used oil disposal shed also had 2 solvent tanks, which we used to back flush the cooler and clean the lines of any possible debris. While all the reusable pieces were getting cleaned internally, we moved on to cleaning the mess of shrapnel and engine oil that coated the engine bay. Just as we finished, the oil cooler system came back fresh and clean, and shortly after engines arrived. We could finally switch gears to the reassembly of the BRE 240Z.
The crew brought back two “long block” engines, meaning the cylinder head and engine block had already been assembled. At first look they were identical in every way and definitely appeared to have been sitting for 40 years. Looking closer, we found one of the engines did not have the timing chain installed which led us to use the one that was “more complete.” We put a wrench on the crank bolt and it rotated 720 degrees, smooth as butter. The next task was to take all the undesirable accessories from the old engine. The 40 year old water pump, alternator, flywheel, crank pulley, thermostat housing, oil filter adaptor, and valve cover were all tossed. We then tackled a quick clean up, removing years of dirt and grim that had built up while sitting.
Our friend and fellow Datsun enthusiast/racer Glenn Chiou recently acquired this R32 GT-R. Before we describe what brings this Skyline to Z Car Garage let’s hear how Glenn found the dream car of his youth:
“As a teenager growing up during the Fast and Furious days it was not hard to get caught up in the import car craze. Amongst the boy racer fantasies of owning RX7’s, Supra’s and R34 Skyline GTR’s, I developed a strong interest in the R32 GTR. The simple design, yet brute power intrigued me. It was always a car that was unobtanium to me. After hearing that I would be able to federal legalize one after 25-years I had to pursue one. Although the car was technically legal in the United States, the wonderful state of California hindered ownership. It was then I learned about International Vehicle Importers run by Skyline aficionado Sean Morris. On a whim, I headed down to IVI in Long Beach, California to take a peek at what they had to offer…”
“As with all my cars, I always look for a unique factory offering during the selection process. After further research I learned that there was a version homologated for racing – the NISMO edition. Nissan built a total of 560 NISMO BNR32 models for homologation purposes to compete in the FIA’s Group A racing class. A total of 60 of the 560 cars were destined for Group A racing in Japan and Australia. NISMO models included twin steel fan turbos (opposed to ceramic), an additional lip spoiler, front brake cooling ducts, side skirt aero splats, removed ABS, and a rear wiper delete. Being a racing junkie, I knew this was the car for me. I took delivery of the car #459 in November 2016 and could not have been more excited. The car provided a unique experience like none other. As an owner of both vintage and modern cars, I was amazed at the fact that this car was designed and built in the late 80’s!”
After a year of ownership Glenn was yearning for an even more enjoyable driving experience. He decided to take a period-correct approach of modification using high quality parts from the era when possible. Shown below are a full Trust Titanium exhaust, authentic NISMO steering wheel and the crown jewel of period-mods: 400R-spec NISMO LM-GT1 wheels! Sized 18×10 with stickier tires all around paired with Ohlin DFV’s coilovers:
Fast forward to November 2017. Glenn was prepping the Skyline for the R’s Day track event at Laguna Seca. With the 12/9 date fast approaching we discussed his GT-R and switching over to the Haltech Platinum Pro Plug-in for engine management. Glenn was excited and Godzilla visited Z Car Garage:
Whenever we install the Haltech Platunum Pro on a GT-R we switch from a mass air flow (MAF) to a manifold absolute pressure (MAP) based setup. The dyno graph shows how we were able to make more power and area under the curve while keeping the car safely tuned on 91 octane:
“To put the cherry on top, we had Z Car Garage work their magic with a Haltech ECU and tune. In short, the car WOKE up. The superb handling coupled with the drivable power made for a perfect track day car and canyon carver.”
Where better to test the R32’s newly found limits than on the race track? We had a blast driving with Glenn and friends at R’s Day in December. He was stoked:
“The car performed beautifully and stuck like it was on train tracks! The car was incredibly predictable and just all-around very enjoyable to drive fast. I look forward to more improvements to the car in the near future, as it will serve as my fun toy between vintage race days!”
Thanks for letting us tune your special R32 Glenn! If you haven’t experienced R’s Day here’s a neat video and coverage from Speedhunters.
UPDATE: Glenn’s Datsuns
Glenn is an avid Datsun enthusiast having owned and raced several cars. You might remember his VIPS 240z vintage race car from the Rolex Monterey Motorsports Reunion last year where he ran the Z alongside our hero John Morton. We also dyno-tuned the Z in preparation for race week. Look for #39 at various events this year!
Next up for restoration, Glenn has located IMSA GTU/Trans Am 260Z, chassis # 000024, formerly driven by Greg Sorrentino of Different Drummer Racing. We know Glenn will do it justice by the amazing work he performed bringing back the Loren St. Lawrence Z:
Glenn loves his vintage race cars and he recently added this B-sedan Datsun 510 to his stable! We should be dyno-tuning it soon. Look for it on the track at this year’s B-sedan races with SVRA:
Let’s not forget Glenn’s street car, his RHD 240z-L is well known in the Datsun community and the subject of a nice feature film on Petrolicious.
The Z has a powerful Rebello stroker motor with triple-mikuni’s and runs perfectly sized Watanabe wheels. On that wheel-related note, we are really excited to report that Glenn will be running our ZCG Big Brakes for small wheels behind those magnificent 15″ Wats! Look for a full report soon. You can catch Glenn putting it through its paces on the 2018 Coastal Range Rally hosted by the good folks at DrivingWhileAwesome.
One of the real joys this holiday season is the opportunity to say thank you and wish you the very best for the new year. From all of us at Z Car Garage we thank our friends, family and customers again for another exciting and productive year! Please note our holiday closure below:
*ZCG will be closed from 12/22 to New Year’s Day. We will re-open for business on 1/2/18*
Before we take a look back at highlights from 2017, check out our exciting plans for 2018 including motorsports events and several customer projects.
Catch us at Road Atlanta in Georgia for the 2018 Classic Motorsports Mitty April 27-29. We will be running pit crew again for John Morton piloting the #46 BRE 240z owned by Randy Jaffe. Nissan is the featured marque!
Just a few of the many customer projects coming along at the shop including full restorations:
Scott W’s 260z is slated for completion in Spring. This Z has a complete color change, ZCG Big-Brakes and a sweet 3.2L with Jenvey ITB fuel injection:
Tim N’s 1973 240z will also be getting new paint, a 3.2L with Jenvey ITBs and our ZCG Big Brake Kit:
Richard Y’s series 1 240z is fresh from paint:
Tuning of the OS Giken TC24B1Z, turn up your speakers and enjoy!
Several Z32 projects will be completed as well, look for full reports next year!
We are excited about our new Big-Brake kit for small (14″) wheels. Debuting at JCCS earlier this year (report soon) we have performed a few local installations into Z cars and 510s. Look for an official offering early next year for S30s, 510s and other Datsuns.
Changes at Z Car Garage
Stay tuned for announcements in 2018 including a new website and business changes!
Highlights from 2017
Enjoy these highlights from 2017 and Z you in the New Year!
