At Z Car Garage we love dyno tuning vintage race cars that are being brought back to life in addition to event veterans. Stan T came up from Socal on referral from fellow racer Steve Link to get his Datsun 1200 back on the race track.   

The Datsun 1200

A few words on the 1200 for the uninitiated, as this small but feisty little Datsun surprised many. The car was Nissan chassis code B110, sold in Japan 1970-1972 and in North America in 1971-1973. Known in the states as a “1200” from its 1.2L engine size and referred to as “Datsun Sunny 1200” in Japan, The 1200 had a rich racing history with success both here and abroad with much of it prowess coming from a lightweight chassis and potent A12 powerplant.

Stan bought his Datsun about 10 years ago as a barn find, tired SCCA H Production racecar. The SCCA logbook that came with the car showed only two races ever entered. It was mostly stock, with a bolt-in Autopower roll cage. Stan tells us about his build and desire to build it with period parts wherever possible:

“Back in the day, one could literally build a Datsun 1200 racecar out of the pages of the Datsun Competition parts catalog. Everything from engines to gearboxes to LSD rear ends was available. Factory teams and independents flocked to the Datsun nameplate, using the available go-fast bits and pieces. My thought with this project was to build up a tribute car in the vein of the original SCCA C Sedan class cars from the 70s, using parts from the Datsun Competition catalog as much as possible. No later, larger engine. No bigger rear axle. Everything was to be as close to period as possible, everything was to be restored with an eye towards authenticity and durability. No Tilton or Wilwood braking systems…I re-fabricated the braking system using historical pictures as a reference.”

“I’ve searched for several years gathering bits here and there from around the world. It was a tedious process – racers naturally use up parts, parts which were not plentiful to start with, and the stockpiles of available pieces had grown smaller over the years. The F5C56A close ratio 5-speed transmission came from New Zealand. A quick shifter and some engine parts came from Japan. Reproduction tail lamp housing gaskets came from a fellow 1200 enthusiast in the Pacific Northwest.”

What about that cool two-piece rocker cover?

“The one-off alloy rocker cover was CNC milled by a genius 1200 owner who took pity on my plea for a two piece unit that would make valve clearance adjustments considerably easier in the pits and back at the shop.”

Race prep advice came from retired 1200 racers who provided a treasure trove of knowledge. The engine was built by master machinist John Edwards in Costa Mesa who, when he was an automotive shop teacher, persuaded Nissan to donate dozens of the A12 engines to the school district for training purposes. 

“This engine is an old SCCA warhorse that was run for years in the San Francisco region. The engine features a ported GX head and a slew of NLA Nismo bits along with trick “modern” pieces like ARP head studs & rod bolts and B-Projects rocker arm collars. It is being resurrected for vintage racing, using a bit more moderate state of tune for longevity and reliability. (if 12.8:1 compression can be called “moderate”)”

Below is a video showing Stan’s A12 motor on the R&D SimTester. It has a variable speed electric motor connected to the flywheel end of the crankshaft, spinning the motor. An oil line connected to the inlet side of the oil pump pressure feeds clean oil to the engine. The tester allows a ‘clean room’ run in of the freshly built engine to bed all the assemblies in, check for oil leaks, find weak/stripped bolts, ascertain clearances of rotating bits at various speeds etc. without generating heat and racket:

 

Stan adds the final steps of his build before dyno tuning:

“Final assembly and fabrication was done by Vinny Torres at Steve Link Racing in Anaheim. While the parts chase was going on, I stripped the body down to a bare shell and had it soda blasted back to bare metal, then repainted it the way it was when I bought it. During that phase, heavy rust was discovered in the cowl area which demanded attention, and after the heavy undercoating was stripped off, it was found out that the front clip of the car had been replaced at some point in an amateurish fashion, requiring a trip to the body shop alignment table to tug things back into some semblance of square.”

 

Dyno Tuning

With the car on the dyno Rob and Josh went to work checking things over in the engine bay. They set the timing correctly, worked on the A/F ratio and fixed a few items in the engine bay.    

  The car made fantastic power screaming to 8500rpm: 

 It was a win/win and Stan was more than pleased:

 “1^st dyno run (blue) showing how poorly the engine ran when I brought it in, then the last dyno run (red) showing the Helen Keller Miracle Worker version, where at the end of that run we all high-fived each other and shouted “Done!” Watching Rob & Josh work together was like watching a couple of master musicians in a recording studio bouncing musical ideas off of each other, with each building on the other’s talents until all of a sudden everything clicks, and a hit is born. They make it seem almost effortless until one steps back and realizes the personal database of tuning knowledge they have has been amassed through thousands and thousands of dyno runs and hundreds of days at the track all feeding back on each other. All the while I stood there awestruck, just happy not to get in the way and to learn a few things while watching the masters at work.”

 

 

Thank you Stan for bringing your 1200 to ZCG. We look forward to your next race!

      

Z Car Garage is expanding to support our vintage, late model and motorsport work. We are seeking an experienced and skilled automotive technician to join our team. This is not an average automotive job. We work 4-10hr days and offer competitive pay/benefits.

Requirements: Automotive experience, your own set of tools, willingness to learn, and be part of a team.

Nissan/Datsun experience is NOT a requirement, you just need to have passion.

Interested or know someone who might be a good fit? Please contact rob@zcargarage.com or call us at (408)452-0350.

 

  

 

VARA is hosting a vintage racing event at Autoclub Speedway January 18-20 in Fontana, CA.
There will be some exciting Vintage Nissan/Datsun groups running, a Japanese car show and autocross events for everyone to participate.
Our friend Mike Anderson will be racing his Rock Vest Datsun 2000 Roadster along with many Datsuns:

 

Let’s get more Datsuns out there, on the track and in the paddock!

Details HERE

 

 

 

https://www.vararacing.com/california-speed-fest

 

Z Car Garage is expanding to support our vintage, late model and motorsport work. We are seeking an experienced and skilled automotive technician to join our team.
This is not an average automotive job. The position is for a special candidate that wants to be part of a shop that is growing and always striving to set the bar a little higher. We offer competitive pay/benefits and the best working environment.
Requirements: Experienced with a good set of tools, willingness to learn, and be part of a team.

Interested or know someone who might be a good fit? Please contact rob@zcargarage.com or call us at (408)452-0350.

 

 

 
Glenn Chiou is an avid Datsun enthusiast having owned and raced several cars. You might remember his VIPS 240z vintage race car from the The Mitty and Rolex Monterey Motorsports Reunion events. He also races a Datsun 510 B-sedan and owns a Nissan R32 Skyline GT-R:

  

This 1972 Nissan 240Z-L however is “the list” car for Glenn that started his Datsun passion. Glenn has owned it for several years, enjoying it as a back-road burner on the street and rallye events.

 

Find out more about the story behind this right-hand-drive survivor over on Petrolicious and also watch this great video:

 

We’ve known Glenn for many years and we actually tuned his Fairlady back in 2012. The 3L stroker produced one of the highest dyno numbers we had seen!

 

Big Brakes for Glenn’s S30

The Z clearly had more than enough power, but braking was always something Glenn wanted to improve and once he heard about our latest Big-Brake Kit for small wheels he became a believer after test driving them. Rather than tell you how we feel about this product, let’s hear Glenn’s experience.

Throughout my years of Z car ownership, I have run a variety of brake setups. My Z cars have seen everything from restored OEM Sumitomos, Toyota 4×4’s, trick Wilwood setups, even frankenstein’d Baer calipers. There is no doubt that it has been one area that I have never been completely satisfied with. Over time, after many years and attempts to find the ‘perfect’ setup, I had given up and just settled for what I had.

The most important aspect to me when it comes to braking on a street driven car is feel. Yes, stopping power is extremely important, but also is not that difficult to achieve on an early Z car that is naturally light to begin with. Feel, however, is something that has always managed to escape me. On my vintage 240z race car, we use multiple master cylinders, swap them in and out, fiddle with our brake proportioning valves, fine tuning them to fit our driving style and preference. We are trying to find that “racer’s edge.” In all honesty, when it comes to a street car, I want nothing to do with all that.

 

Wheel sizing and style was also extremely important to me. I love old school wheels and the sizes they came in. I needed a brake caliper that would fit under my 15” Watanabe RS wheels without having to shave or drastically modify my setup. If it was not for being in love with these wheels, I would have opted for Z Car Garage’s larger big brake kit.

A few words about our latest big-brake kit solution. Our successful, larger ZCG BBK utilizes 328mm rotors and 4-piston calipers requiring a 16″ or 17″ wheel. This kit was made with our friends Tyler and Eric from Stoptech over ten years ago. Recently our customers asked us to make a BBK for smaller wheels so even a guy running 14″ vintage 5-slots slots could brake like a modern sports car. Typical big-brake kits use a 4-piston setup up front and a ZX in back; Proportioning is hard to get right, varying from car to car. We wanted a brake system that suited the car and totally bolted in, no M/C change, no proportioning valve, no booster change.

 

 

Working with Stoptech again, we developed this smaller BBK as a direct bolt-in solution for the 1970 to 1978 S30 Z cars. We’ve been with Stoptech since the beginning and love their products.  We aim to release this product to the masses once our local installs are completed.  Let’s get back to Glenn and hear his initial impressions of the big-brake kit:

Rob informed me he was working up a solution and he wanted me to be test the brake kit. Rob promised three things – they would brake amazing, they would fit under my 15” Watanabes, and they would feel as if they belonged on the car. Did I doubt it at first? Sure, a little. However, I also knew that the fit and finish of all products that came out of ZCG were top notch, and that Rob thoroughly tested all his products against his own standards. Which I’m sure everyone knows, are extremely high.

In preparation for the Monterey Historics last year, I had brought the Z race car to the shop for dyno time. Rob gave me the keys to his Butters Z and said “Go drive it.” Under 14″ wheels sat his brand new ZCG brake kit. I gladly accepted and took the car for a ride. 

 

 

WOW, what a difference. The feel, modulation, power, sharpness was amazing. Hands down the best brakes I had ever driven on a Z car, and these were on a car with stock suspension, tires and probably cruddy tires! I told Rob, “sign me up!”

Glenn wanted to run the brake kit on his Fairlady and we happily obliged. He had also been gearing up for a road rallye so the braking system would be throughly used. You can see his Z (top left) along with his buddy Erich C’s S30 (top right, also getting a ZCG BBK!):

 

Then came the day Rob called me up and said they were ready to rock and roll. Lucky for me, I was just about to head out on the 1000-mile Coastal Range Rally! The kit came with beautifully anodized front and rear calipers, hats, rotors, brakes lines, reversible brackets (for early and later Z offsets), and a factory ⅞” master cylinder. Read that again… Yes, a proportioning valve was left out from that list! The brakes were a straight bolt on and ZCG did all the math to get both the master cylinder size and piston sizes correct. We brought the car in for install and within a day the car was ready to rock.

 

 

Glenn’s 240z now had 4-wheel disc brakes ready to tackle the street and rallye:

  

And of course, the brakes fit beautifully under the 15″ Watts. Kane approved, and Glenn was stoked:

 

I could hardly wait to jump in the seat of the car and take it for a spin. The brakes were now on a car with suspension, tire, power, and a proper alignment. It was everything I had remembered from driving the Butters Z and MORE. The brakes performed flawlessly on the Coastal Range Rally, taking abuse from California’s most challenging roads:

 

Attention to detail goes a long way. This is exactly what these brakes delivered, and what continues to be delivered by ZCG.

LONG LIVE THE Z!

 

We are happy to report that Glenn is still braking late and still braking deep all while Enjoy The Ride! You can find him carving through the Santa Cruz Mountains:

 

Big thanks to Glenn for letting us work on your Fairlady! We also thank Eric and Tyler from Stoptech for supporting us and our precious Z cars!

 

More pictures in the gallery below!
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